0 files changed, 0 insertions, 0 deletions
diff --git a/.dir-locals.el b/.dir-locals.el
new file mode 100644
index 0000000000..8f4b96445c
--- /dev/null
+++ b/.dir-locals.el
@@ -0,0 +1,39 @@
+;; Copyright (c) 2018 Urabe, Shyouhei.  All rights reserved.
+;;
+;; This file is a part of  the programming language Ruby.  Permission is hereby
+;; granted, to either  redistribute and/or modify this file,  provided that the
+;; conditions mentioned  in the  file COPYING  are met.   Consult the  file for
+;; details.
+
+((nil .
+     ((indent-tabs-mode . nil)
+      (require-final-newline . t)
+      (tab-width . 8)
+      (show-trailing-whitespace . t)
+      (whitespace-line-column . 80))) ;; See also [Misc #12277]
+
+ ;; (bat-mode . ((buffer-file-coding-system . utf-8-dos)))
+
+ (ruby-mode . ((ruby-indent-level . 2)))
+
+ (rdoc-mode . ((fill-column . 74)))
+
+ (yaml-mode . ((yaml-indent-offset . 2)))
+
+ (makefile-mode . ((indent-tabs-mode . t)))
+
+ (c-mode . ((c-file-style . "ruby")))
+
+ (c++-mode . ((c-file-style . "ruby")))
+
+ (change-log-mode .
+     ((buffer-file-coding-system . us-ascii)
+      (indent-tabs-mode . t)
+      (change-log-indent-text . 2)
+      (add-log-time-format . (lambda (&optional x y)
+        (let* ((time (or x (current-time)))
+	       (system-time-locale "C")
+	       (diff (+ (cadr time) 32400))
+	       (lo (% diff 65536))
+	       (hi (+ (car time) (/ diff 65536))))
+        (format-time-string "%a %b %e %H:%M:%S %Y" (list hi lo) t)))))))
diff --git a/.document b/.document
index fb27ba325d..753d6f9892 100644
--- a/.document
+++ b/.document
@@ -5,9 +5,36 @@
 
 # Process all the C source files
 *.c
+*.y
 
 # prelude
 prelude.rb
+rbconfig.rb
+
+array.rb
+ast.rb
+dir.rb
+gc.rb
+hash.rb
+io.rb
+kernel.rb
+marshal.rb
+numeric.rb
+nilclass.rb
+pack.rb
+pathname_builtin.rb
+ractor.rb
+string.rb
+symbol.rb
+timev.rb
+thread_sync.rb
+trace_point.rb
+warning.rb
+yjit.rb
+zjit.rb
+
+# Errno::*
+known_errors.inc
 
 # the lib/ directory (which has its own .document file)
 lib
@@ -15,12 +42,18 @@ lib
 # and some of the ext/ directory (which has its own .document file)
 ext
 
-# rdoc files
-ChangeLog
+# For `prism`, ruby code is in lib and c in the prism folder
+prism
 
-NEWS
+# rdoc files
+NEWS.md
 
 README.md
 README.ja.md
 
+COPYING
+COPYING.ja
+
+LEGAL
+
 doc
diff --git a/.editorconfig b/.editorconfig
index 67abf4b978..4633a7acae 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -2,15 +2,29 @@ root = true
 
 [*]
 end_of_line = lf
+indent_size = 4
+indent_style = space
 insert_final_newline = true
-trim_trailing_whitespace = true
 tab_width = 8
-indent_style = tab
-indent_size = 4
+trim_trailing_whitespace = true
 
-[**.bat]
+[*.bat]
 end_of_line = crlf
 
-[**.rb]
-indent_style = space
+[*.gemspec]
+indent_size = 2
+
+[*.rb]
+indent_size = 2
+
+[*.yml]
+indent_size = 2
+
+[{*[Mm]akefile*,*.mak,*.mk,depend}]
+indent_style = tab
+
+[enc/*]
+indent_size = 2
+
+[reg*.[ch]]
 indent_size = 2
diff --git a/.gdbinit b/.gdbinit
index 5864bb15ce..4457f6f12b 100644
--- a/.gdbinit
+++ b/.gdbinit
@@ -1,21 +1,7 @@
-define hook-run
-  set $color_type = 0
-  set $color_highlite = 0
-  set $color_end = 0
-end
-
 define ruby_gdb_init
-  if !$color_type
-    set $color_type = "\033[31m"
-  end
-  if !$color_highlite
-    set $color_highlite = "\033[36m"
-  end
-  if !$color_end
-    set $color_end = "\033[m"
-  end
-  if ruby_dummy_gdb_enums.special_consts
-  end
+  init-if-undefined $color_type = "\033[31m"
+  init-if-undefined $color_highlite = "\033[36m"
+  init-if-undefined $color_end = "\033[m"
 end
 
 # set prompt \033[36m(gdb)\033[m\040
@@ -63,7 +49,15 @@ define rp
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_OBJECT
     printf "%sT_OBJECT%s: ", $color_type, $color_end
-    print (struct RObject *)($arg0)
+    print ((struct RObject *)($arg0))->basic
+    if ($flags & ROBJECT_EMBED)
+      print/x *((VALUE*)((struct RObject*)($arg0))->as.ary) @ (RSHAPE_CAPACITY(rb_obj_shape_id($arg0)))
+    else
+      print (((struct RObject *)($arg0))->as.heap)
+      if (((struct RObject*)($arg0))->as.heap.numiv) > 0
+        print/x *(((struct RObject*)($arg0))->as.heap.ivptr) @ (((struct RObject*)($arg0))->as.heap.numiv)
+      end
+    end
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_CLASS
     printf "%sT_CLASS%s%s: ", $color_type, ($flags & RUBY_FL_SINGLETON) ? "*" : "", $color_end
@@ -89,14 +83,13 @@ define rp
     set $regsrc = ((struct RRegexp*)($arg0))->src
     set $rsflags = ((struct RBasic*)$regsrc)->flags
     printf "%sT_REGEXP%s: ", $color_type, $color_end
+    set $len = ((struct RString*)($arg0))->len
     set print address off
-    output (char *)(($rsflags & RUBY_FL_USER1) ? \
-	    ((struct RString*)$regsrc)->as.heap.ptr : \
-	    ((struct RString*)$regsrc)->as.ary)
+    output *(char *)(($rsflags & RUBY_FL_USER1) ? \
+            ((struct RString*)$regsrc)->as.heap.ptr : \
+            ((struct RString*)$regsrc)->as.embed.ary) @ $len
     set print address on
-    printf " len:%ld ", ($rsflags & RUBY_FL_USER1) ? \
-            ((struct RString*)$regsrc)->as.heap.len : \
-            (($rsflags & (RUBY_FL_USER2|RUBY_FL_USER3|RUBY_FL_USER4|RUBY_FL_USER5|RUBY_FL_USER6)) >> RUBY_FL_USHIFT+2)
+    printf " len:%ld ", $len
     if $flags & RUBY_FL_USER6
       printf "(none) "
     end
@@ -115,26 +108,26 @@ define rp
       printf "%sT_ARRAY%s: len=%ld ", $color_type, $color_end, $len
       printf "(embed) "
       if ($len == 0)
-	printf "{(empty)} "
+        printf "{(empty)} "
       else
-	output/x *((VALUE*)((struct RArray*)($arg0))->as.ary) @ $len
-	printf " "
+        print/x *((VALUE*)((struct RArray*)($arg0))->as.ary) @ $len
+        printf " "
       end
     else
       set $len = ((struct RArray*)($arg0))->as.heap.len
       printf "%sT_ARRAY%s: len=%ld ", $color_type, $color_end, $len
       if ($flags & RUBY_FL_USER2)
-	printf "(shared) shared="
-	output/x ((struct RArray*)($arg0))->as.heap.aux.shared
-	printf " "
+        printf "(shared) shared="
+        output/x ((struct RArray*)($arg0))->as.heap.aux.shared_root
+        printf " "
       else
-	printf "(ownership) capa=%ld ", ((struct RArray*)($arg0))->as.heap.aux.capa
+        printf "(ownership) capa=%ld ", ((struct RArray*)($arg0))->as.heap.aux.capa
       end
       if ($len == 0)
-	printf "{(empty)} "
+        printf "{(empty)} "
       else
-	output/x *((VALUE*)((struct RArray*)($arg0))->as.heap.ptr) @ $len
-	printf " "
+        print/x *((VALUE*)((struct RArray*)($arg0))->as.heap.ptr) @ $len
+        printf " "
       end
     end
     print (struct RArray *)($arg0)
@@ -145,34 +138,29 @@ define rp
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_HASH
     printf "%sT_HASH%s: ", $color_type, $color_end,
-    if ((struct RHash *)($arg0))->ntbl
-      printf "len=%ld ", ((struct RHash *)($arg0))->ntbl->num_entries
+    if (((struct RHash *)($arg0))->basic.flags & RHASH_ST_TABLE_FLAG)
+      set $st = (struct st_table *)((uintptr_t)($arg0) + sizeof(struct RHash))
+      printf "st len=%ld ", $st->num_entries
+      print $st
+    else
+      printf "li len=%ld bound=%ld ", \
+        ((((struct RHash *)($arg0))->basic.flags & RHASH_AR_TABLE_SIZE_MASK) >> RHASH_AR_TABLE_SIZE_SHIFT), \
+        ((((struct RHash *)($arg0))->basic.flags & RHASH_AR_TABLE_BOUND_MASK) >> RHASH_AR_TABLE_BOUND_SHIFT)
+	print (struct ar_table_struct *)((uintptr_t)($arg0) + sizeof(struct RHash))
     end
-    print (struct RHash *)($arg0)
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_STRUCT
-    printf "%sT_STRUCT%s: len=%ld ", $color_type, $color_end, \
-      (($flags & (RUBY_FL_USER1|RUBY_FL_USER2)) ? \
+    set $len = (($flags & (RUBY_FL_USER1|RUBY_FL_USER2)) ? \
        ($flags & (RUBY_FL_USER1|RUBY_FL_USER2)) >> (RUBY_FL_USHIFT+1) : \
        ((struct RStruct *)($arg0))->as.heap.len)
+    printf "%sT_STRUCT%s: len=%ld ", $color_type, $color_end, $len
     print (struct RStruct *)($arg0)
-    x/xw (($flags & (RUBY_FL_USER1|RUBY_FL_USER2)) ? \
-          ((struct RStruct *)($arg0))->as.ary : \
-          ((struct RStruct *)($arg0))->as.heap.ptr)
+    output/x *(($flags & (RUBY_FL_USER1|RUBY_FL_USER2)) ? \
+              ((struct RStruct *)($arg0))->as.ary : \
+              ((struct RStruct *)($arg0))->as.heap.ptr) @ $len
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_BIGNUM
-    printf "%sT_BIGNUM%s: sign=%d len=%ld ", $color_type, $color_end, \
-      (($flags & RUBY_FL_USER1) != 0), \
-      (($flags & RUBY_FL_USER2) ? \
-       ($flags & (RUBY_FL_USER5|RUBY_FL_USER4|RUBY_FL_USER3)) >> (RUBY_FL_USHIFT+3) : \
-       ((struct RBignum*)($arg0))->as.heap.len)
-    if $flags & RUBY_FL_USER2
-      printf "(embed) "
-    end
-    print (struct RBignum *)($arg0)
-    x/xw (($flags & RUBY_FL_USER2) ? \
-          ((struct RBignum*)($arg0))->as.ary : \
-          ((struct RBignum*)($arg0))->as.heap.digits)
+    rp_bignum $arg0
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_RATIONAL
     printf "%sT_RATIONAL%s: ", $color_type, $color_end
@@ -197,12 +185,14 @@ define rp
     print (struct RBasic *)($arg0)
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_DATA
-    if ((struct RTypedData *)($arg0))->typed_flag == 1
-      printf "%sT_DATA%s(%s): ", $color_type, $color_end, ((struct RTypedData *)($arg0))->type->wrap_struct_name
-      print (struct RTypedData *)($arg0)
+    set $data = (struct RTypedData *)($arg0)
+    set $type = (const rb_data_type_t *)($data->type & ~1)
+    printf "%sT_DATA%s(%s): ", $color_type, $color_end, $type->wrap_struct_name
+    print *$type
+    if ($data->type & 1)
+      print (void *)&$data->data
     else
-      printf "%sT_DATA%s: ", $color_type, $color_end
-      print (struct RData *)($arg0)
+      print $data
     end
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_MATCH
@@ -247,7 +237,7 @@ define rp
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_IMEMO
     printf "%sT_IMEMO%s(", $color_type, $color_end
-    output (enum imemo_type)(($flags>>RUBY_FL_USHIFT)&imemo_mask)
+    output (enum imemo_type)(($flags>>RUBY_FL_USHIFT)&RUBY_IMEMO_MASK)
     printf "): "
     rp_imemo $arg0
   else
@@ -261,6 +251,10 @@ define rp
     printf "%sT_ZOMBIE%s: ", $color_type, $color_end
     print (struct RData *)($arg0)
   else
+  if ($flags & RUBY_T_MASK) == RUBY_T_MOVED
+    printf "%sT_MOVED%s: ", $color_type, $color_end
+    print *(struct RMoved *)$arg0
+  else
     printf "%sunknown%s: ", $color_type, $color_end
     print (struct RBasic *)($arg0)
   end
@@ -296,6 +290,7 @@ define rp
   end
   end
   end
+  end
 end
 document rp
   Print a Ruby's VALUE.
@@ -327,6 +322,9 @@ define rp_id
   if $id == idLTLT
     printf "(:<<)\n"
   else
+  if $id == idGTGT
+    printf "(:>>)\n"
+  else
   if $id == idLE
     printf "(:<=)\n"
   else
@@ -354,6 +352,18 @@ define rp_id
   if $id == idASET
     printf "(:[]=)\n"
   else
+  if $id == idCOLON2
+    printf "(:'::')\n"
+  else
+  if $id == idANDOP
+    printf "(:&&)\n"
+  else
+  if $id == idOROP
+    printf "(:||)\n"
+  else
+  if $id == idANDDOT
+    printf "(:&.)\n"
+  else
     if $id <= tLAST_OP_ID
       printf "O"
     else
@@ -385,12 +395,13 @@ define rp_id
       end
     end
     printf "(%ld): ", $id
-    set $str = lookup_id_str($id)
-    if $str
-      rp_string $str
-    else
-      echo undef\n
-    end
+    print_id $id
+    echo \n
+  end
+  end
+  end
+  end
+  end
   end
   end
   end
@@ -413,16 +424,31 @@ document rp_id
   Print an ID.
 end
 
-define rp_string
+define output_string
   set $flags = ((struct RBasic*)($arg0))->flags
-  set print address off
-  output (char *)(($flags & RUBY_FL_USER1) ? \
-	    ((struct RString*)($arg0))->as.heap.ptr : \
-	    ((struct RString*)($arg0))->as.ary)
-  set print address on
-  printf " bytesize:%ld ", ($flags & RUBY_FL_USER1) ? \
-          ((struct RString*)($arg0))->as.heap.len : \
-          (($flags & (RUBY_FL_USER2|RUBY_FL_USER3|RUBY_FL_USER4|RUBY_FL_USER5|RUBY_FL_USER6)) >> RUBY_FL_USHIFT+2)
+  set $len = ((struct RString*)($arg0))->len
+  if $len > 0
+    output *(char *)(($flags & RUBY_FL_USER1) ? \
+            ((struct RString*)($arg0))->as.heap.ptr : \
+            ((struct RString*)($arg0))->as.embed.ary) @ $len
+  else
+    output ""
+  end
+end
+
+define print_string
+  set $flags = ((struct RBasic*)($arg0))->flags
+  set $len = ((struct RString*)($arg0))->len
+  if $len > 0
+    printf "%s", *(char *)(($flags & RUBY_FL_USER1) ? \
+            ((struct RString*)($arg0))->as.heap.ptr : \
+            ((struct RString*)($arg0))->as.embed.ary) @ $len
+  end
+end
+
+define rp_string
+  output_string $arg0
+  printf " bytesize:%ld ", $len
   if !($flags & RUBY_FL_USER1)
     printf "(embed) "
   else
@@ -453,22 +479,67 @@ document rp_string
   Print the content of a String.
 end
 
+define rp_bignum
+  set $flags = ((struct RBignum*)($arg0))->basic.flags
+  set $len = (($flags & RUBY_FL_USER2) ? \
+       ($flags & (RUBY_FL_USER5|RUBY_FL_USER4|RUBY_FL_USER3)) >> (RUBY_FL_USHIFT+3) : \
+       ((struct RBignum*)($arg0))->as.heap.len)
+  printf "%sT_BIGNUM%s: sign=%d len=%ld ", $color_type, $color_end, \
+         (($flags & RUBY_FL_USER1) != 0), $len
+  if $flags & RUBY_FL_USER2
+    printf "(embed) "
+  end
+  print (struct RBignum *)($arg0)
+  set $ptr = (($flags & RUBY_FL_USER2) ? \
+              ((struct RBignum*)($arg0))->as.ary : \
+              ((struct RBignum*)($arg0))->as.heap.digits)
+  set $len = $len-1
+  printf "0x%x", $ptr[$len]
+  while $len > 0
+    set $len = $len-1
+    set $val = $ptr[$len]
+    set $w = sizeof($ptr[0])
+    printf "_"
+    if $w > 8
+      printf "%.32x", $val
+    else
+    if $w > 4
+      printf "%.16x", $val
+    else
+    if $w > 2
+      printf "%.8x", $val
+    else
+    if $w > 1
+      printf "%.4x", $val
+    else
+      printf "%.2x", $val
+    end
+    end
+    end
+    end
+  end
+  printf "\n"
+end
+document rp_bignum
+  Print the content of a Bignum.
+end
+
 define rp_class
+  set $class_and_classext = (struct RClass_and_rb_classext_t *)($arg0)
   printf "(struct RClass *) %p", (void*)$arg0
-  if ((struct RClass *)($arg0))->ptr.origin_ != $arg0
-    printf " -> %p", ((struct RClass *)($arg0))->ptr.origin_
+  if $class_and_classext->classext->origin_ != (VALUE)$arg0
+    printf " -> %p", $class_and_classext->classext->origin_
   end
   printf "\n"
   rb_classname $arg0
-  print *(struct RClass *)($arg0)
-  print *((struct RClass *)($arg0))->ptr
+  print/x *$class_and_classext
 end
 document rp_class
   Print the content of a Class/Module.
 end
 
 define rp_imemo
-  set $flags = (((struct RBasic *)($arg0))->flags >> RUBY_FL_USHIFT) & imemo_mask
+  set $flags = (enum imemo_type)((((struct RBasic *)($arg0))->flags >> RUBY_FL_USHIFT) & RUBY_IMEMO_MASK)
   if $flags == imemo_cref
     printf "(rb_cref_t *) %p\n", (void*)$arg0
     print *(rb_cref_t *)$arg0
@@ -489,6 +560,14 @@ define rp_imemo
     printf "(struct MEMO *) %p\n", (void*)$arg0
     print *(struct MEMO *)$arg0
   else
+  if $flags == imemo_ment
+    printf "(rb_method_entry_t *) %p\n", (void*)$arg0
+    print *(rb_method_entry_t *)$arg0
+  else
+  if $flags == imemo_iseq
+    printf "(rb_iseq_t *) %p\n", (void*)$arg0
+    print *(rb_iseq_t *)$arg0
+  else
     printf "(struct RIMemo *) %p\n", (void*)$arg0
     print *(struct RIMemo *)$arg0
   end
@@ -496,6 +575,8 @@ define rp_imemo
   end
   end
   end
+  end
+  end
 end
 document rp_imemo
   Print the content of a memo
@@ -590,11 +671,6 @@ define nd_stts
 end
 
 
-define nd_entry
-  printf "%su3.entry%s: ", $color_highlite, $color_end
-  p ($arg0).u3.entry
-end
-
 define nd_vid
   printf "%su1.id%s: ", $color_highlite, $color_end
   p ($arg0).u1.id
@@ -610,12 +686,6 @@ define nd_cval
   rp ($arg0).u3.value
 end
 
-
-define nd_cnt
-  printf "%su3.cnt%s: ", $color_highlite, $color_end
-  p ($arg0).u3.cnt
-end
-
 define nd_tbl
   printf "%su1.tbl%s: ", $color_highlite, $color_end
   p ($arg0).u1.tbl
@@ -654,12 +724,6 @@ define nd_lit
   rp ($arg0).u1.value
 end
 
-
-define nd_frml
-  printf "%su1.node%s: ", $color_highlite, $color_end
-  rp ($arg0).u1.node
-end
-
 define nd_rest
   printf "%su2.argc%s: ", $color_highlite, $color_end
   p ($arg0).u2.argc
@@ -686,12 +750,6 @@ define nd_args
   rp ($arg0).u3.node
 end
 
-
-define nd_noex
-  printf "%su1.id%s: ", $color_highlite, $color_end
-  p ($arg0).u1.id
-end
-
 define nd_defn
   printf "%su3.node%s: ", $color_highlite, $color_end
   rp ($arg0).u3.node
@@ -709,17 +767,6 @@ define nd_new
 end
 
 
-define nd_cfnc
-  printf "%su1.cfunc%s: ", $color_highlite, $color_end
-  p ($arg0).u1.cfunc
-end
-
-define nd_argc
-  printf "%su2.argc%s: ", $color_highlite, $color_end
-  p ($arg0).u2.argc
-end
-
-
 define nd_cname
   printf "%su1.id%s: ", $color_highlite, $color_end
   p ($arg0).u1.id
@@ -781,7 +828,7 @@ end
 
 define nd_tree
   set $buf = (struct RString *)rb_str_buf_new(0)
-  call dump_node((VALUE)($buf), rb_str_new(0, 0), 0, ($arg0))
+  call dump_node((VALUE)($buf), rb_str_tmp_new(0), 0, ($arg0))
   printf "%s\n", $buf->as.heap.ptr
 end
 
@@ -798,22 +845,22 @@ define rb_numtable_entry
     set $rb_numtable_p = $rb_numtable_tbl->as.packed.bins
     while $rb_numtable_p && $rb_numtable_p < $rb_numtable_tbl->as.packed.bins+$rb_numtable_tbl->num_entries
       if $rb_numtable_p.k == $rb_numtable_id
-	set $rb_numtable_key = $rb_numtable_p.k
-	set $rb_numtable_rec = $rb_numtable_p.v
-	set $rb_numtable_p = 0
+        set $rb_numtable_key = $rb_numtable_p.k
+        set $rb_numtable_rec = $rb_numtable_p.v
+        set $rb_numtable_p = 0
       else
-	set $rb_numtable_p = $rb_numtable_p + 1
+        set $rb_numtable_p = $rb_numtable_p + 1
       end
     end
   else
     set $rb_numtable_p = $rb_numtable_tbl->as.big.bins[st_numhash($rb_numtable_id) % $rb_numtable_tbl->num_bins]
     while $rb_numtable_p
       if $rb_numtable_p->key == $rb_numtable_id
-	set $rb_numtable_key = $rb_numtable_p->key
-	set $rb_numtable_rec = $rb_numtable_p->record
-	set $rb_numtable_p = 0
+        set $rb_numtable_key = $rb_numtable_p->key
+        set $rb_numtable_rec = $rb_numtable_p->record
+        set $rb_numtable_p = 0
       else
-	set $rb_numtable_p = $rb_numtable_p->next
+        set $rb_numtable_p = $rb_numtable_p->next
       end
     end
   end
@@ -851,11 +898,10 @@ document rb_method_entry
 end
 
 define rb_classname
-  # up to 128bit int
-  set $rb_classname_permanent = "0123456789ABCDEF"
-  set $rb_classname = classname($arg0, $rb_classname_permanent)
-  if $rb_classname != RUBY_Qnil
-    rp $rb_classname
+  set $rb_classname = ((struct RClass_and_rb_classext_t*)$arg0)->classext->classpath
+  if $rb_classname != RUBY_Qfalse
+    print_string $rb_classname
+    printf "\n"
   else
     echo anonymous class/module\n
   end
@@ -892,7 +938,7 @@ define iseq
       set $operand_size = ((INSN*)($arg0))->operand_size
       set $operands = ((INSN*)($arg0))->operands
       while $i < $operand_size
-	rp $operands[$i++]
+        rp $operands[$i++]
       end
     end
   end
@@ -902,7 +948,7 @@ define iseq
 end
 
 define rb_ps
-  rb_ps_vm ruby_current_vm
+  rb_ps_vm ruby_current_vm_ptr
 end
 document rb_ps
 Dump all threads and their callstacks
@@ -910,38 +956,310 @@ end
 
 define rb_ps_vm
   print $ps_vm = (rb_vm_t*)$arg0
-  set $ps_threads = (st_table*)$ps_vm->living_threads
-  if $ps_threads->entries_packed
-    set $ps_threads_i = 0
-    while $ps_threads_i < $ps_threads->num_entries
-      set $ps_threads_key = (st_data_t)$ps_threads->as.packed.entries[$ps_threads_i].key
-      set $ps_threads_val = (st_data_t)$ps_threads->as.packed.entries[$ps_threads_i].val
-      rb_ps_thread $ps_threads_key $ps_threads_val
-      set $ps_threads_i = $ps_threads_i + 1
-    end
-  else
-    set $ps_threads_ptr = (st_table_entry*)$ps_threads->head
-    while $ps_threads_ptr
-      set $ps_threads_key = (st_data_t)$ps_threads_ptr->key
-      set $ps_threads_val = (st_data_t)$ps_threads_ptr->record
-      rb_ps_thread $ps_threads_key $ps_threads_val
-      set $ps_threads_ptr = (st_table_entry*)$ps_threads_ptr->fore
+  set $ps_thread_ln      = $ps_vm->ractor.main_ractor.threads.set.n.next
+  set $ps_thread_ln_last = $ps_vm->ractor.main_ractor.threads.set.n.prev
+  while 1
+    set $ps_thread_th = (rb_thread_t *)$ps_thread_ln
+    set $ps_thread = (VALUE)($ps_thread_th->self)
+    rb_ps_thread $ps_thread
+    if $ps_thread_ln == $ps_thread_ln_last
+      loop_break
     end
+    set $ps_thread_ln = $ps_thread_ln->next
   end
 end
 document rb_ps_vm
 Dump all threads in a (rb_vm_t*) and their callstacks
 end
 
-define rb_ps_thread
-  set $ps_thread = (struct RTypedData*)$arg0
-  set $ps_thread_id = $arg1
-  print $ps_thread_th = (rb_thread_t*)$ps_thread->data
+define print_lineno
+  set $cfp = $arg0
+  set $iseq = rb_get_cfp_iseq($cfp)
+  set $pos = $cfp->pc - $iseq->body->iseq_encoded
+  if $pos != 0
+    set $pos = $pos - 1
+  end
+
+  set $index = 0
+  set $size = $iseq->body->insns_info.size
+  set $table = $iseq->body->insns_info.body
+  set $positions = $iseq->body->insns_info.positions
+  #printf "size: %d\n", $size
+  if $size == 0
+  else
+  if $size == 1
+    printf "%d", $table[0].line_no
+  else
+    if $positions
+      # get_insn_info_linear_search
+      set $index = 1
+      while $index < $size
+        #printf "table[%d]: position: %d, line: %d, pos: %d\n", $i, $positions[$i], $table[$i].line_no, $pos
+        if $positions[$index] > $pos
+          loop_break
+        end
+        set $index = $index + 1
+        if $positions[$index] == $pos
+          loop_break
+        end
+      end
+    else
+      # get_insn_info_succinct_bitvector
+      set $sd = $iseq->body->insns_info.succ_index_table
+      set $immediate_table_size = sizeof($sd->imm_part) / sizeof(uint64_t) * 9
+      if $pos < $immediate_table_size
+        set $i = $pos / 9
+        set $j = $pos % 9
+        set $index = ((int)($sd->imm_part[$i] >> ($j * 7))) & 0x7f
+      else
+        set $block_index = ($pos - $immediate_table_size) / 512
+        set $block = &$sd->succ_part[$block_index]
+        set $block_bit_index = ($pos - $immediate_table_size) % 512
+        set $small_block_index = $block_bit_index / 64
+        set $small_block_popcount = $small_block_index == 0 ? 0 : (((int)($block->small_block_ranks >> (($small_block_index - 1) * 9))) & 0x1ff)
+        set $x = $block->bits[$small_block_index] << (63 - $block_bit_index % 64)
+        set $x = ($x & 0x5555555555555555) + ($x >> 1 & 0x5555555555555555)
+        set $x = ($x & 0x3333333333333333) + ($x >> 2 & 0x3333333333333333)
+        set $x = ($x & 0x0707070707070707) + ($x >> 4 & 0x0707070707070707)
+        set $x = ($x & 0x001f001f001f001f) + ($x >> 8 & 0x001f001f001f001f)
+        set $x = ($x & 0x0000003f0000003f) + ($x >>16 & 0x0000003f0000003f)
+        set $popcnt = ($x & 0x7f) + ($x >>32 & 0x7f)
+        set $index = $block->rank + $small_block_popcount + $popcnt
+      end
+    end
+    printf "%d", $table[$index-1].line_no
+  end
+  end
+end
+
+define check_method_entry
+  set $imemo = (struct RBasic *)$arg0
+  if $imemo != RUBY_Qfalse
+    set $type = ($imemo->flags >> 12) & 0x07
+    if $type == imemo_ment
+      set $me = (rb_callable_method_entry_t *)$imemo
+    else
+    if $type == imemo_svar
+      set $imemo = ((struct vm_svar *)$imemo)->cref_or_me
+      check_method_entry $imemo
+    end
+    end
+  end
+end
+
+define print_id
+  set $id = $arg0
+  # rb_id_to_serial
+  if $id > tLAST_OP_ID
+    set $serial = (rb_id_serial_t)($id >> RUBY_ID_SCOPE_SHIFT)
+  else
+    set $serial = (rb_id_serial_t)$id
+  end
+  if $serial && $serial < ruby_global_symbols.next_id
+    set $idx = $serial / ID_ENTRY_UNIT
+    set $ids = (struct RArray *)ruby_global_symbols.ids
+    set $flags = $ids->basic.flags
+    if ($flags & RUBY_FL_USER1)
+      set $idsptr = $ids->as.ary
+      set $idslen = (($flags & (RUBY_FL_USER3|RUBY_FL_USER4)) >> (RUBY_FL_USHIFT+3))
+    else
+      set $idsptr = $ids->as.heap.ptr
+      set $idslen = $ids->as.heap.len
+    end
+    if $idx < $idslen
+      set $t = 0
+      set $ary = (struct RArray *)$idsptr[$idx]
+      if $ary != RUBY_Qnil
+        set $flags = $ary->basic.flags
+        if ($flags & RUBY_FL_USER1)
+          set $aryptr = $ary->as.ary
+          set $arylen = (($flags & (RUBY_FL_USER3|RUBY_FL_USER4)) >> (RUBY_FL_USHIFT+3))
+        else
+          set $aryptr = $ary->as.heap.ptr
+          set $arylen = $ary->as.heap.len
+        end
+        set $result = $aryptr[($serial % ID_ENTRY_UNIT) + $t]
+        if $result != RUBY_Qnil
+          print_string $result
+        else
+          echo undef
+        end
+      end
+    end
+  end
 end
 
-# Details: https://bugs.ruby-lang.org/projects/ruby-trunk/wiki/MachineInstructionsTraceWithGDB
+define print_pathobj
+  set $flags = ((struct RBasic*)($arg0))->flags
+  if ($flags & RUBY_T_MASK) == RUBY_T_STRING
+    print_string $arg0
+  end
+  if ($flags & RUBY_T_MASK) == RUBY_T_ARRAY
+    if $flags & RUBY_FL_USER1
+      set $str = ((struct RArray*)($arg0))->as.ary[0]
+    else
+      set $str = ((struct RArray*)($arg0))->as.heap.ptr[0]
+    end
+    print_string $str
+  end
+end
+
+define rb_ps_thread
+  set $ps_thread = (struct RTypedData*)$arg0
+  set $ps_thread_th = (rb_thread_t*)$ps_thread->data
+  printf "* #<Thread:%p rb_thread_t:%p native_thread:%p>\n", \
+    $ps_thread, $ps_thread_th, $ps_thread_th->nt
+  set $cfp = $ps_thread_th->ec->cfp
+  set $cfpend = (rb_control_frame_t *)($ps_thread_th->ec->vm_stack + $ps_thread_th->ec->vm_stack_size)-1
+  while $cfp < $cfpend
+    if $cfp->_iseq
+      set $iseq = rb_get_cfp_iseq($cfp)
+      if !((VALUE)$iseq & RUBY_IMMEDIATE_MASK) && (((imemo_ifunc << RUBY_FL_USHIFT) | RUBY_T_IMEMO)==$iseq->flags & ((RUBY_IMEMO_MASK << RUBY_FL_USHIFT) | RUBY_T_MASK))
+        printf "%d:ifunc ", $cfpend-$cfp
+        set print symbol-filename on
+        output/a $iseq.body
+        set print symbol-filename off
+        printf "\n"
+      else
+      if $cfp->pc
+        set $location = $iseq->body->location
+        printf "%d:", $cfpend-$cfp
+        print_pathobj $location.pathobj
+        printf ":"
+        print_lineno $cfp
+        printf ":in `"
+        print_string $location.label
+        printf "'\n"
+      else
+        printf "%d: ???.rb:???:in `???'\n", $cfpend-$cfp
+      end
+      end
+    else
+      # if VM_FRAME_TYPE($cfp->flag) == VM_FRAME_MAGIC_CFUNC
+      set $ep = $cfp->ep
+      if ($ep[0] & 0xffff0001) == 0x55550001
+        #define VM_ENV_FLAG_LOCAL 0x02
+        #define VM_ENV_PREV_EP(ep)   GC_GUARDED_PTR_REF(ep[VM_ENV_DATA_INDEX_SPECVAL])
+        set $me = 0
+        set $env_specval = $ep[-1]
+        set $env_me_cref = $ep[-2]
+        while ($env_specval & 0x02) != 0
+          check_method_entry $env_me_cref
+          if $me != 0
+            loop_break
+          end
+          set $ep = $ep[0]
+          set $env_specval = $ep[-1]
+          set $env_me_cref = $ep[-2]
+        end
+        if $me == 0
+          check_method_entry $env_me_cref
+        end
+        printf "%d:", $cfpend-$cfp
+        set print symbol-filename on
+        output/a $me->def->body.cfunc.func
+        set print symbol-filename off
+        set $mid = $me->def->original_id
+        printf ":in `"
+        print_id $mid
+        printf "'\n"
+      else
+        printf "%d:unknown_frame:???:in `???'\n", $cfpend-$cfp
+      end
+    end
+    set $cfp = $cfp + 1
+  end
+end
+
+define rb_count_objects
+  set $objspace = ruby_current_vm_ptr->objspace
+  set $counts_00 = 0
+  set $counts_01 = 0
+  set $counts_02 = 0
+  set $counts_03 = 0
+  set $counts_04 = 0
+  set $counts_05 = 0
+  set $counts_06 = 0
+  set $counts_07 = 0
+  set $counts_08 = 0
+  set $counts_09 = 0
+  set $counts_0a = 0
+  set $counts_0b = 0
+  set $counts_0c = 0
+  set $counts_0d = 0
+  set $counts_0e = 0
+  set $counts_0f = 0
+  set $counts_10 = 0
+  set $counts_11 = 0
+  set $counts_12 = 0
+  set $counts_13 = 0
+  set $counts_14 = 0
+  set $counts_15 = 0
+  set $counts_16 = 0
+  set $counts_17 = 0
+  set $counts_18 = 0
+  set $counts_19 = 0
+  set $counts_1a = 0
+  set $counts_1b = 0
+  set $counts_1c = 0
+  set $counts_1d = 0
+  set $counts_1e = 0
+  set $counts_1f = 0
+  set $total = 0
+  set $i = 0
+  while $i < $objspace->heap_pages.allocated_pages
+    printf "\rcounting... %d/%d", $i, $objspace->heap_pages.allocated_pages
+    set $page = $objspace->heap_pages.sorted[$i]
+    set $p = $page->start
+    set $pend = $p + $page->total_slots
+    while $p < $pend
+      set $flags = $p->as.basic.flags & 0x1f
+      eval "set $counts_%02x = $counts_%02x + 1", $flags, $flags
+      set $p = $p + 1
+    end
+    set $total = $total + $page->total_slots
+    set $i = $i + 1
+  end
+  printf "\rTOTAL: %d, FREE: %d\n", $total, $counts_00
+  printf "T_OBJECT: %d\n", $counts_01
+  printf "T_CLASS: %d\n", $counts_02
+  printf "T_MODULE: %d\n", $counts_03
+  printf "T_FLOAT: %d\n", $counts_04
+  printf "T_STRING: %d\n", $counts_05
+  printf "T_REGEXP: %d\n", $counts_06
+  printf "T_ARRAY: %d\n", $counts_07
+  printf "T_HASH: %d\n", $counts_08
+  printf "T_STRUCT: %d\n", $counts_09
+  printf "T_BIGNUM: %d\n", $counts_0a
+  printf "T_FILE: %d\n", $counts_0b
+  printf "T_DATA: %d\n", $counts_0c
+  printf "T_MATCH: %d\n", $counts_0d
+  printf "T_COMPLEX: %d\n", $counts_0e
+  printf "T_RATIONAL: %d\n", $counts_0f
+  #printf "UNKNOWN_10: %d\n", $counts_10
+  printf "T_NIL: %d\n", $counts_11
+  printf "T_TRUE: %d\n", $counts_12
+  printf "T_FALSE: %d\n", $counts_13
+  printf "T_SYMBOL: %d\n", $counts_14
+  printf "T_FIXNUM: %d\n", $counts_15
+  printf "T_UNDEF: %d\n", $counts_16
+  #printf "UNKNOWN_17: %d\n", $counts_17
+  #printf "UNKNOWN_18: %d\n", $counts_18
+  #printf "UNKNOWN_19: %d\n", $counts_19
+  printf "T_IMEMO: %d\n", $counts_1a
+  printf "T_NODE: %d\n", $counts_1b
+  printf "T_ICLASS: %d\n", $counts_1c
+  printf "T_ZOMBIE: %d\n", $counts_1d
+  #printf "UNKNOWN_1E: %d\n", $counts_1e
+  printf "T_MASK: %d\n", $counts_1f
+end
+document rb_count_objects
+  Counts all objects grouped by type.
+end
+
+# Details: https://github.com/ruby/ruby/wiki/Machine-Instructions-Trace-with-GDB
 define trace_machine_instructions
-  set logging on
+  set logging enabled
   set height 0
   set width 0
   display/i $pc
@@ -955,3 +1273,60 @@ define SDR
   call rb_vmdebug_stack_dump_raw_current()
 end
 
+define rbi
+  if ((LINK_ELEMENT*)$arg0)->type == ISEQ_ELEMENT_LABEL
+    p *(LABEL*)$arg0
+  else
+  if ((LINK_ELEMENT*)$arg0)->type == ISEQ_ELEMENT_INSN
+    p *(INSN*)$arg0
+  else
+  if ((LINK_ELEMENT*)$arg0)->type == ISEQ_ELEMENT_ADJUST
+    p *(ADJUST*)$arg0
+  else
+    print *$arg0
+  end
+  end
+  end
+end
+
+define dump_node
+  set $str = rb_parser_dump_tree($arg0, 0)
+  set $flags = ((struct RBasic*)($str))->flags
+  printf "%s", (char *)(($flags & RUBY_FL_USER1) ? \
+                        ((struct RString*)$str)->as.heap.ptr : \
+                        ((struct RString*)$str)->as.embed.ary)
+end
+
+define print_flags
+  printf "RUBY_FL_WB_PROTECTED: %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_WB_PROTECTED ? "1" : "0"
+  printf "RUBY_FL_PROMOTED    : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_PROMOTED ? "1" : "0"
+  printf "RUBY_FL_FINALIZE    : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_FINALIZE ? "1" : "0"
+  printf "RUBY_FL_SHAREABLE   : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_SHAREABLE ? "1" : "0"
+  printf "RUBY_FL_EXIVAR      : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_EXIVAR ? "1" : "0"
+  printf "RUBY_FL_FREEZE      : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_FREEZE ? "1" : "0"
+
+  printf "RUBY_FL_USER0       : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER0 ? "1" : "0"
+  printf "RUBY_FL_USER1       : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER1 ? "1" : "0"
+  printf "RUBY_FL_USER2       : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER2 ? "1" : "0"
+  printf "RUBY_FL_USER3       : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER3 ? "1" : "0"
+  printf "RUBY_FL_USER4       : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER4 ? "1" : "0"
+  printf "RUBY_FL_USER5       : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER5 ? "1" : "0"
+  printf "RUBY_FL_USER6       : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER6 ? "1" : "0"
+  printf "RUBY_FL_USER7       : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER7 ? "1" : "0"
+  printf "RUBY_FL_USER8       : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER8 ? "1" : "0"
+  printf "RUBY_FL_USER9       : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER9 ? "1" : "0"
+  printf "RUBY_FL_USER10      : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER10 ? "1" : "0"
+  printf "RUBY_FL_USER11      : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER11 ? "1" : "0"
+  printf "RUBY_FL_USER12      : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER12 ? "1" : "0"
+  printf "RUBY_FL_USER13      : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER13 ? "1" : "0"
+  printf "RUBY_FL_USER14      : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER14 ? "1" : "0"
+  printf "RUBY_FL_USER15      : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER15 ? "1" : "0"
+  printf "RUBY_FL_USER16      : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER16 ? "1" : "0"
+  printf "RUBY_FL_USER17      : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER17 ? "1" : "0"
+  printf "RUBY_FL_USER18      : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_USER18 ? "1" : "0"
+end
+
+source -s misc/gdb.py
+
+# Moved from beginning, since it fails on older gdbs
+set startup-with-shell off
diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
new file mode 100644
index 0000000000..d752612085
--- /dev/null
+++ b/.git-blame-ignore-revs
@@ -0,0 +1,54 @@
+# This is a file used by GitHub to ignore the following commits on `git blame`.
+#
+# You can also do the same thing in your local repository with:
+# $ git config --local blame.ignoreRevsFile .git-blame-ignore-revs
+
+# Expand tabs
+5b21e94bebed90180d8ff63dad03b8b948361089
+c5e9af9c9d890578182a21e7b71b50334cd5579e
+e63a2115f64433b21cb5dd67c5bf8b30f87ef293
+712ac99e4d0384a941c80a9f48f62943ba7d97c0
+d1474affa8e105bece209cc9d594bb0a989859e1
+2da92388b948821269b18d6b178a680f17e41750
+5062c0c621d887367af8a054e5e5d83d7ec57dd3
+
+# Indentation
+0e4bad888e605d424b9222ae0ca43f85c1634e5e
+61aa46c41648c6d1e9b0daa1a292de551fde78df
+
+# Enable Style/StringLiterals cop for RubyGems/Bundler
+d7ffd3fea402239b16833cc434404a7af82d44f3
+
+# [ruby/digest] Revert tab-expansion in external files
+48b09aae7ec5632209229dcc294dd0d75a93a17f
+8a65cf3b61c60e4cb886f59a73ff6db44364bfa9
+39dc9f9093901d40d2998653948d5da38b18ee2c
+
+# [ruby/io-nonblock] Revert tab expansion
+f28287d34c03f472ffe90ea262bdde9affd4b965
+0d842fecb4f75ab3b1d4097ebdb8e88f51558041
+4ba2c66761d6a293abdfba409241d31063cefd62
+
+# Make benchmark indentation consistent
+fc4acf8cae82e5196186d3278d831f2438479d91
+
+# Make prism_compile.c indentation consistent
+40b2c8e5e7e6e5f83cee9276dc9c1922a69292d6
+d2c5867357ed88eccc28c2b3bd4a46e206e7ff85
+
+# Miss-and-revived commits
+a0f7de814ae5c299d6ce99bed5fb308a05d50ba0
+d4e24021d39e1f80f0055b55d91f8d5f22e15084
+7a56c316418980b8a41fcbdc94067b2bda2ad112
+e90282be7ba1bc8e3119f6e1a2c80356ceb3f80a
+26a9e0b4e31f7b5a9cbd755e0a15823a8fa51bae
+2f53985da9ee593fe524d408256835667938c7d7
+bf01f6ae89a95d8f5572e050facfe311c8c28aaf
+7480cd8d37fd71a41ce12b759090051c7e14fb5a
+
+# Win32: EOL code of batch files
+23f9a0d655c4d405bb2397a147a1523436205486
+b839989fd22fef85e2af19de1bc83aa72a5b22bd
+
+# ZJIT cargo-insta snapshot raw string literals
+b78e0a6ddf7df8a7568ea71284f593423c739551
diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000000..f98c091e3f
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,14 @@
+*.gemspec diff=ruby
+*.rb diff=ruby
+*.inc.rs linguist-generated=true
+bin svn-properties=svn:ignore=ruby
+bin/* diff=ruby
+tool/update-deps diff=ruby
+tool/make-snapshot diff=ruby
+tool/format-release diff=ruby
+tool/leaked-globals diff=ruby
+
+# To strip CR from the batch files, set the `diff.dos.textconv` filter
+# like as `git config diff.dos.textconv $'sed \'s/\r$//\''`.
+*.bat diff=dos
+*.cmd diff=dos
diff --git a/.github/SECURITY.md b/.github/SECURITY.md
new file mode 100644
index 0000000000..56baa29942
--- /dev/null
+++ b/.github/SECURITY.md
@@ -0,0 +1,9 @@
+# Security Policy
+
+## Supported Versions
+
+See <https://www.ruby-lang.org/en/downloads/branches/>.
+
+## Reporting a Vulnerability
+
+See <https://www.ruby-lang.org/en/security/>.
diff --git a/.github/actions/capiext/action.yml b/.github/actions/capiext/action.yml
new file mode 100644
index 0000000000..ed69c8ac5e
--- /dev/null
+++ b/.github/actions/capiext/action.yml
@@ -0,0 +1,86 @@
+name: rubyspec C-API extensions
+
+inputs:
+  builddir:
+    required: false
+    default: '.'
+  make:
+    required: false
+    default: 'make -s'
+
+outputs:
+  key:
+    value: >-
+      ${{
+      !steps.restore.outputs.cache-hit &&
+      github.ref == 'refs/heads/master' &&
+      steps.config.outputs.key
+      }}
+
+runs:
+  using: composite
+
+  steps:
+    - id: config
+      shell: bash
+      run: |
+        eval $(grep -e '^arch *=' -e '^ruby_version *=' -e '^DLEXT *=' Makefile |
+            sed 's/ *= */=/')
+        case "${ruby_version}" in
+        *+*) key=capiexts-${arch}-${ruby_version}-${{ hashFiles('src/spec/ruby/optional/capi/ext/*.[ch]') }};;
+        *)   key=;;
+        esac
+        echo version=$ruby_version >> $GITHUB_OUTPUT
+        echo key="$key" >> $GITHUB_OUTPUT
+        echo DLEXT=$DLEXT >> $GITHUB_OUTPUT
+      working-directory: ${{ inputs.builddir }}
+
+    - name: Restore previous CAPI extensions
+      uses: actions/cache/restore@0400d5f644dc74513175e3cd8d07132dd4860809 # v4.2.4
+      id: cache
+      with:
+        path: ${{ inputs.builddir }}/spec/ruby/optional/capi/ext/
+        key: ${{ steps.config.outputs.key }}
+      if: ${{ steps.config.outputs.key }}
+
+    - name: Run test-spec with previous CAPI extension binaries
+      id: check
+      shell: bash
+      run: | # zizmor: ignore[template-injection]
+        touch spec/ruby/optional/capi/ext/*.$DLEXT
+        [ ! -f spec/ruby/optional/capi/ext/\*.$DLEXT ]
+        ${{ inputs.make }} SPECOPTS=optional/capi test-spec
+      env:
+        DLEXT: ${{ steps.config.outputs.DLEXT }}
+      working-directory: ${{ inputs.builddir }}
+      if: ${{ steps.cache.outputs.cache-hit }}
+
+    - name: Strip CAPI extensions
+      id: strip
+      shell: bash
+      run: |
+        rm -f spec/ruby/optional/capi/ext/*.c
+        [ "$DLEXT" = bundle ] || # separated to .dSYM directories
+        strip spec/ruby/optional/capi/ext/*.$DLEXT
+      env:
+        DLEXT: ${{ steps.config.outputs.DLEXT }}
+      working-directory: ${{ inputs.builddir }}
+      if: >-
+        ${{true
+        && ! steps.cache.outputs.cache-hit
+        && github.ref_name == 'master'
+        }}
+
+    - name: Save CAPI extensions
+      uses: actions/cache/save@0400d5f644dc74513175e3cd8d07132dd4860809 # v4.2.4
+      with:
+        path: ${{ inputs.builddir }}/spec/ruby/optional/capi/ext/
+        key: ${{ steps.config.outputs.key }}
+      if: ${{ steps.strip.outcome == 'success' }}
+
+    - shell: bash
+      run: |
+        echo "::error::Change from ${prev} detected; bump up ABI version"
+      env:
+        prev: ${{ steps.config.outputs.version }}
+      if: ${{ always() && steps.check.outcome == 'failure' }}
diff --git a/.github/actions/compilers/action.yml b/.github/actions/compilers/action.yml
new file mode 100644
index 0000000000..c700bbfe9e
--- /dev/null
+++ b/.github/actions/compilers/action.yml
@@ -0,0 +1,164 @@
+name: Compiles ruby in a container
+description: >-
+  Makes ruby using a dedicated container
+
+inputs:
+  tag:
+    required: false
+    default: clang-20
+    description: >-
+      container image tag to use in this run.
+
+  with_gcc:
+    required: false
+    description: >-
+      override compiler path & flags.
+
+  CFLAGS:
+    required: false
+    description: >-
+      C compiler flags to override.
+
+  CXXFLAGS:
+    required: false
+    description: >-
+      C++ compiler flags to override.
+
+  optflags:
+    required: false
+    # -O1 is faster than -O3 in our tests... Majority of time are consumed trying
+    # to optimize binaries.  Also GitHub Actions run on relatively modern CPUs
+    # compared to, say, GCC 4 or Clang 3.  We don't specify `-march=native`
+    # because compilers tend not understand what the CPU is.
+    default: '-O1'
+    description: >-
+      Compiler flags for optimisations.
+
+  cppflags:
+    required: false
+    description: >-
+      Additional preprocessor flags.
+
+  append_configure:
+    required: false
+    default: >-
+      --without-valgrind
+      --without-jemalloc
+      --without-gmp
+    description: >-
+      flags to append to configure.
+
+  enable_shared:
+    required: false
+    default: true
+    description: >-
+      Whether to build libruby.so.
+
+  check:
+    required: false
+    default: ''
+    description: >-
+      Whether to run `make check`
+
+  test_all:
+    required: false
+    default: ''
+    description: >-
+      Whether to run `make test-all` with options for test-all.
+
+  test_spec:
+    required: false
+    default: ''
+    description: >-
+      Whether to run `make test-spec` with options for mspec.
+
+  static_exts:
+    required: false
+    description: >-
+      whitespace separated list of extensions that need be linked statically.
+
+runs:
+  using: composite
+  steps:
+    - shell: bash
+      run: docker pull --quiet "ghcr.io/ruby/ruby-ci-image:${INPUT_TAG}"
+      env:
+        INPUT_TAG: ${{ inputs.tag }}
+
+    - name: Enable Launchable conditionally
+      id: enable-launchable
+      run: echo "enable-launchable=true" >> $GITHUB_OUTPUT
+      shell: bash
+      if: >-
+        ${{
+        github.repository == 'ruby/ruby' ||
+        (github.repository != 'ruby/ruby' && env.LAUNCHABLE_TOKEN)
+        }}
+
+    - name: compile
+      shell: bash
+      run: >-
+        docker run
+        --rm
+        --user=root
+        --volume "${GITHUB_WORKSPACE}:/github/workspace:ro"
+        --workdir=/github/workspace
+        --entrypoint=/github/workspace/.github/actions/compilers/entrypoint.sh
+        --env CI
+        --env GITHUB_ACTION
+        --env INPUT_WITH_GCC
+        --env INPUT_CFLAGS
+        --env INPUT_CXXFLAGS
+        --env INPUT_OPTFLAGS
+        --env INPUT_CPPFLAGS
+        --env INPUT_APPEND_CONFIGURE
+        --env INPUT_CHECK
+        --env INPUT_TEST_ALL
+        --env INPUT_TEST_SPEC
+        --env INPUT_ENABLE_SHARED
+        --env INPUT_STATIC_EXTS
+        --env LAUNCHABLE_ORGANIZATION
+        --env LAUNCHABLE_WORKSPACE
+        --env LAUNCHABLE_ENABLED
+        --env GITHUB_PR_HEAD_SHA
+        --env GITHUB_PULL_REQUEST_URL
+        --env GITHUB_REF
+        --env GITHUB_ACTIONS
+        --env GITHUB_RUN_ID
+        --env GITHUB_REPOSITORY
+        --env GITHUB_WORKFLOW
+        --env GITHUB_RUN_NUMBER
+        --env GITHUB_EVENT_NAME
+        --env GITHUB_SHA
+        --env GITHUB_HEAD_REF
+        --env GITHUB_SERVER_URL
+        "ghcr.io/ruby/ruby-ci-image:${INPUT_TAG}"
+      env:
+        INPUT_TAG: ${{ inputs.tag }}
+        INPUT_WITH_GCC: ${{ inputs.with_gcc || inputs.tag }}
+        INPUT_CFLAGS: ${{ inputs.CFLAGS }}
+        INPUT_CXXFLAGS: ${{ inputs.CXXFLAGS }}
+        INPUT_OPTFLAGS: ${{ inputs.OPTFLAGS }}
+        INPUT_CPPFLAGS: ${{ inputs.cppflags }}
+        INPUT_APPEND_CONFIGURE: ${{ inputs.append_configure }}
+        INPUT_CHECK: ${{ inputs.check }}
+        INPUT_TEST_ALL: ${{ inputs.test_all }}
+        INPUT_TEST_SPEC: ${{ inputs.test_spec }}
+        INPUT_ENABLE_SHARED: ${{ inputs.enable_shared }}
+        INPUT_STATIC_EXTS: ${{ inputs.static_exts }}
+        LAUNCHABLE_ORGANIZATION: ${{ github.repository_owner }}
+        LAUNCHABLE_WORKSPACE: ${{ github.event.repository.name }}
+        LAUNCHABLE_ENABLED: ${{ steps.enable-launchable.outputs.enable-launchable || false }}
+        GITHUB_PR_HEAD_SHA: ${{ github.event.pull_request.head.sha || github.sha }}
+        GITHUB_PULL_REQUEST_URL: ${{ github.event.pull_request.html_url }}
+        GITHUB_REF: ${{ github.ref }}
+
+    # Clean up non-default docker images to save disk space.
+    # The default image (clang-20) is reused across multiple steps
+    # within the same job, so we keep it to avoid redundant pulls.
+    - name: clean up docker image
+      shell: bash
+      run: docker rmi "ghcr.io/ruby/ruby-ci-image:${INPUT_TAG}" || true
+      if: ${{ always() && inputs.tag != 'clang-20' }}
+      env:
+        INPUT_TAG: ${{ inputs.tag }}
diff --git a/.github/actions/compilers/entrypoint.sh b/.github/actions/compilers/entrypoint.sh
new file mode 100755
index 0000000000..b554151091
--- /dev/null
+++ b/.github/actions/compilers/entrypoint.sh
@@ -0,0 +1,90 @@
+#! /bin/bash
+
+# Copyright (c) 2024 Ruby developers.  All rights reserved.
+#
+# This file is  a part of the programming language  Ruby.  Permission is hereby
+# granted, to  either redistribute and/or  modify this file, provided  that the
+# conditions  mentioned in  the file  COPYING are  met.  Consult  the file  for
+# details.
+
+grouped()
+{
+    echo "::group::${@}"
+    "${@}"
+    echo "::endgroup::"
+}
+
+set -e
+set -u
+set -o pipefail
+
+srcdir="/github/workspace/src"
+builddir="$(mktemp -dt)"
+
+export GITHUB_WORKFLOW='Compilations'
+export CONFIGURE_TTY='never'
+export RUBY_DEBUG='ci rgengc'
+export RUBY_TESTOPTS='-q --color=always --tty=no'
+export RUBY_DEBUG_COUNTER_DISABLE='1'
+export GNUMAKEFLAGS="-j$((1 + $(nproc)))"
+
+case "x${INPUT_ENABLE_SHARED}" in
+x | xno | xfalse )
+    enable_shared='--disable-shared'
+    ;;
+*)
+    enable_shared='--enable-shared'
+    ;;
+esac
+
+pushd ${builddir}
+
+grouped git config --global --add safe.directory ${srcdir}
+
+grouped ${srcdir}/configure        \
+    -C                             \
+    --with-gcc="${INPUT_WITH_GCC}" \
+    --enable-debug-env             \
+    --disable-install-doc          \
+    --with-ext=-test-/cxxanyargs,+ \
+    --without-git                  \
+    ${enable_shared}               \
+    ${INPUT_APPEND_CONFIGURE}      \
+    CFLAGS="${INPUT_CFLAGS}"       \
+    CXXFLAGS="${INPUT_CXXFLAGS}"   \
+    optflags="${INPUT_OPTFLAGS}"   \
+    cppflags="${INPUT_CPPFLAGS}"   \
+    debugflags='-ggdb3' # -g0 disables backtraces when SEGV.  Do not set that.
+
+popd
+
+if [[ -n "${INPUT_STATIC_EXTS}" ]]; then
+    echo "::group::ext/Setup"
+    set -x
+    mkdir ${builddir}/ext
+    (
+        for ext in ${INPUT_STATIC_EXTS}; do
+            echo "${ext}"
+        done
+    ) >> ${builddir}/ext/Setup
+    set +x
+    echo "::endgroup::"
+fi
+
+if [ -n "$INPUT_TEST_ALL" ]; then
+  tests=" -- $INPUT_TEST_ALL"
+else
+  tests=" -- ruby -ext-"
+fi
+
+pushd ${builddir}
+
+grouped make showflags
+grouped make all
+# grouped make install
+
+# Run only `make test` by default. Run other tests if specified.
+grouped make test
+if [[ -n "$INPUT_CHECK" ]]; then grouped make test-tool; fi
+if [[ -n "$INPUT_CHECK" || -n "$INPUT_TEST_ALL" ]]; then grouped make test-all TESTS="$tests"; fi
+if [[ -n "$INPUT_CHECK" || -n "$INPUT_TEST_SPEC" ]]; then grouped env CHECK_LEAKS=true make test-spec MSPECOPT="$INPUT_TEST_SPEC"; fi
diff --git a/.github/actions/launchable/setup/action.yml b/.github/actions/launchable/setup/action.yml
new file mode 100644
index 0000000000..305878492c
--- /dev/null
+++ b/.github/actions/launchable/setup/action.yml
@@ -0,0 +1,337 @@
+name: Set up Launchable
+description: >-
+  Install the required dependencies and execute the necessary Launchable commands for test recording
+
+inputs:
+  os:
+    required: true
+    description: The operating system that CI runs on. This value is used in Launchable flavor.
+
+  test-opts:
+    default: none
+    required: false
+    description: >-
+      Test options that determine how tests are run.
+      This value is used in the Launchable flavor.
+
+  launchable-token:
+    required: false
+    description: >-
+      Launchable token is needed if you want to run Launchable on your forked repository.
+      See https://github.com/ruby/ruby/wiki/CI-Servers#launchable-ci for details.
+
+  builddir:
+    required: false
+    default: ${{ github.workspace }}
+    description: >-
+      Directory to create Launchable report file.
+
+  srcdir:
+    required: false
+    default: ${{ github.workspace }}
+    description: >-
+      Directory to (re-)checkout source codes. Launchable retrieves the commit information
+      from the directory.
+
+  test-task:
+    required: false
+    default: ${{ matrix.test_task }}
+    description: >-
+      Specifies a single test task to be executed.
+      This value is used in the Launchable flavor.
+      Either 'test-task' or 'multi-test-tasks' must be configured.
+
+  test-tasks:
+    required: false
+    default: '[]'
+    description: >-
+      Specifies an array of multiple test tasks to be executed.
+      For example: '["test", "test-all"]'.
+      If you want to run a single test task, use the 'test-task' input instead.
+
+  is-yjit:
+    required: false
+    default: 'false'
+    description: >-
+      Whether this workflow is executed on YJIT.
+
+  is-zjit:
+    required: false
+    default: 'false'
+    description: >-
+      Whether this workflow is executed on ZJIT.
+
+outputs:
+  stdout_report_path:
+    value: ${{ steps.global.outputs.stdout_report_path }}
+    description: >-
+      Report file path for standard output.
+
+  stderr_report_path:
+    value: ${{ steps.global.outputs.stderr_report_path }}
+    description: >-
+      Report file path for standard error.
+
+runs:
+  using: composite
+
+  steps:
+    - name: Enable Launchable conditionally
+      id: enable-launchable
+      run: echo "enable-launchable=true" >> $GITHUB_OUTPUT
+      shell: bash
+      if: >-
+        ${{
+        (github.repository == 'ruby/ruby'
+          || (github.repository != 'ruby/ruby'
+          && env.LAUNCHABLE_TOKEN))
+        && (inputs.test-task == 'check'
+          || inputs.test-task == 'test-all'
+          || inputs.test-task == 'test'
+          || contains(fromJSON(inputs.test-tasks), 'test-all')
+          || contains(fromJSON(inputs.test-tasks), 'test'))
+        }}
+
+    # Launchable CLI requires Python and Java.
+    # https://www.launchableinc.com/docs/resources/cli-reference/
+    - name: Set up Python
+      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
+      with:
+        python-version: "3.x"
+      if: >-
+        ${{ steps.enable-launchable.outputs.enable-launchable
+        && !endsWith(inputs.os, 'ppc64le') && !endsWith(inputs.os, 's390x') }}
+
+    - name: Set up Java
+      uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4.8.0
+      with:
+        distribution: 'temurin'
+        java-version: '17'
+      if: >-
+        ${{ steps.enable-launchable.outputs.enable-launchable
+        && !endsWith(inputs.os, 'ppc64le') && !endsWith(inputs.os, 's390x') }}
+
+    - name: Set up Java ppc64le
+      uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4.8.0
+      with:
+        distribution: 'semeru'
+        architecture: 'ppc64le'
+        java-version: '17'
+      if: >-
+        ${{ steps.enable-launchable.outputs.enable-launchable
+        && endsWith(inputs.os, 'ppc64le') }}
+
+    - name: Set up Java s390x
+      uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4.8.0
+      with:
+        distribution: 'semeru'
+        architecture: 's390x'
+        java-version: '17'
+      if: >-
+        ${{ steps.enable-launchable.outputs.enable-launchable
+        && endsWith(inputs.os, 's390x') }}
+
+    - name: Set global vars
+      id: global
+      shell: bash
+      run: |
+        test_all_enabled="${{ inputs.test-task == 'check' ||  inputs.test-task == 'test-all' || contains(fromJSON(inputs.test-tasks), 'test-all') }}"
+        btest_enabled="${{ inputs.test-task == 'check' ||  inputs.test-task == 'test' || contains(fromJSON(inputs.test-tasks), 'test') }}"
+        test_spec_enabled="${{ inputs.test-task == 'check' ||  inputs.test-task == 'test-spec' || contains(fromJSON(inputs.test-tasks), 'test-spec') }}"
+        echo test_all_enabled="${test_all_enabled}" >> $GITHUB_OUTPUT
+        echo btest_enabled="${btest_enabled}" >> $GITHUB_OUTPUT
+        echo test_spec_enabled="${test_spec_enabled}" >> $GITHUB_OUTPUT
+        echo test_all_report_file='launchable_test_all_report.json' >> $GITHUB_OUTPUT
+        echo btest_report_file='launchable_btest_report.json' >> $GITHUB_OUTPUT
+        echo test_spec_report_dir='launchable_test_spec_report' >> $GITHUB_OUTPUT
+        echo stdout_report_path="launchable_stdout.log" >> $GITHUB_OUTPUT
+        echo stderr_report_path="launchable_stderr.log" >> $GITHUB_OUTPUT
+      if: steps.enable-launchable.outputs.enable-launchable
+
+    - name: Set environment variables for Launchable
+      shell: bash
+      run: | # zizmor: ignore[github-env]
+        : # GITHUB_PULL_REQUEST_URL are used for commenting test reports in Launchable Github App.
+        : # https://github.com/launchableinc/cli/blob/v1.80.1/launchable/utils/link.py#L42
+        echo "GITHUB_PULL_REQUEST_URL=${INPUT_PR_HTML_URL}" >> $GITHUB_ENV
+        : # The following envs are necessary in Launchable tokenless authentication.
+        : # https://github.com/launchableinc/cli/blob/v1.80.1/launchable/utils/authentication.py#L20
+        echo "LAUNCHABLE_ORGANIZATION=${INPUT_REPOSITORY_OWNER}" >> $GITHUB_ENV
+        echo "LAUNCHABLE_WORKSPACE=${INPUT_REPOSITORY_NAME}" >> $GITHUB_ENV
+        : # https://github.com/launchableinc/cli/blob/v1.80.1/launchable/utils/authentication.py#L71
+        echo "GITHUB_PR_HEAD_SHA=${INPUT_PR_HEAD_SHA}" >> $GITHUB_ENV
+        echo "LAUNCHABLE_TOKEN=${INPUT_LAUNCHABLE_TOKEN}" >> $GITHUB_ENV
+        : # To prevent a slowdown in CI, disable request retries when the Launchable server is unstable.
+        echo "LAUNCHABLE_SKIP_TIMEOUT_RETRY=1" >> $GITHUB_ENV
+        echo "LAUNCHABLE_COMMIT_TIMEOUT=1" >> $GITHUB_ENV
+      env:
+        INPUT_PR_HTML_URL: ${{ github.event.pull_request.html_url }}
+        INPUT_REPOSITORY_OWNER: ${{ github.repository_owner }}
+        INPUT_REPOSITORY_NAME: ${{ github.event.repository.name }}
+        INPUT_PR_HEAD_SHA: ${{ github.event.pull_request.head.sha || github.sha }}
+        INPUT_LAUNCHABLE_TOKEN: ${{ inputs.launchable-token }}
+      if: steps.enable-launchable.outputs.enable-launchable
+
+    - name: Set up path
+      shell: bash
+      working-directory: ${{ inputs.srcdir }}
+      # Since updated PATH variable will be available in only subsequent actions, we need to add the path beforehand.
+      # https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#adding-a-system-path
+      run: echo "$(python -msite --user-base)/bin" >> $GITHUB_PATH # zizmor: ignore[github-env]
+      if: >-
+        ${{
+        steps.enable-launchable.outputs.enable-launchable
+        && (startsWith(inputs.os, 'macos')
+          || endsWith(inputs.os, 'ppc64le')
+          || endsWith(inputs.os, 's390x'))
+        }}
+
+    - name: Set up Launchable
+      id: setup-launchable
+      shell: bash
+      working-directory: ${{ inputs.srcdir }}
+      run: | # zizmor: ignore[github-env]
+        set -x
+        pip install --user launchable
+        : # The build name cannot include a slash, so we replace the string here.
+        github_ref="${INPUT_GITHUB_REF}"
+        github_ref="${github_ref//\//_}"
+        : # With the --name option, we need to configure a unique identifier for this build.
+        : # To avoid setting the same build name as the CI which runs on other branches, we use the branch name here.
+        build_name="${github_ref}_${GITHUB_PR_HEAD_SHA}"
+        test_opts="${INPUT_TEST_OPTS}"
+        test_opts="${test_opts// /}"
+        test_opts="${test_opts//=/:}"
+        test_all_test_suite='test-all'
+        btest_test_suite='btest'
+        test_spec_test_suite='test-spec'
+        if [ "${INPUT_IS_YJIT}" = "true" ]; then
+          test_all_test_suite="yjit-${test_all_test_suite}"
+          btest_test_suite="yjit-${btest_test_suite}"
+          test_spec_test_suite="yjit-${test_spec_test_suite}"
+        fi
+        if [ "${INPUT_IS_ZJIT}" = "true" ]; then
+          test_all_test_suite="zjit-${test_all_test_suite}"
+          btest_test_suite="zjit-${btest_test_suite}"
+          test_spec_test_suite="zjit-${test_spec_test_suite}"
+        fi
+        # launchable_setup target var -- refers ${target} prefixed variables
+        launchable_setup() {
+          local target=$1 session
+          eval [ "\${${target}_enabled}" = "true" ] || return
+          eval local suite=\${${target}_test_suite}
+          session=$(launchable record session \
+            --build "${build_name}" \
+            --observation \
+            --flavor os="${INPUT_OS}" \
+            --flavor test_task="${INPUT_TEST_TASK}" \
+            --flavor test_opts="${test_opts}" \
+            --flavor workflow="${INPUT_WORKFLOW}" \
+            --test-suite ${suite} \
+            )
+          echo "${target}_session=${session}" >> $GITHUB_OUTPUT
+        }
+
+        launchable record build --name "${build_name}"
+        if launchable_setup test_all; then
+          echo "TESTS=${TESTS:+$TESTS }--launchable-test-reports=${test_all_report_file}" >> $GITHUB_ENV
+        fi
+        if launchable_setup btest; then
+          echo "BTESTS=${BTESTS:+$BTESTS }--launchable-test-reports=${btest_report_file}" >> $GITHUB_ENV
+        fi
+        if launchable_setup test_spec; then
+          echo "SPECOPTS=${SPECOPTS:$SPECOPTS }--launchable-test-reports=${test_spec_report_dir}" >> $GITHUB_ENV
+          echo test_spec_enabled=true >> $GITHUB_OUTPUT
+        fi
+
+        echo launchable_setup_dir=$(pwd) >> $GITHUB_OUTPUT
+      if: steps.enable-launchable.outputs.enable-launchable
+      env:
+        INPUT_GITHUB_REF: ${{ github.ref }}
+        INPUT_TEST_OPTS: ${{ inputs.test-opts }}
+        INPUT_IS_YJIT: ${{ inputs.is-yjit }}
+        INPUT_IS_ZJIT: ${{ inputs.is-zjit }}
+        INPUT_OS: ${{ inputs.os }}
+        INPUT_TEST_TASK: ${{ inputs.test-task }}
+        INPUT_WORKFLOW: ${{ github.workflow }}
+        test_all_enabled: ${{ steps.global.outputs.test_all_enabled }}
+        btest_enabled: ${{ steps.global.outputs.btest_enabled }}
+        test_spec_enabled: ${{ steps.global.outputs.test_spec_enabled }}
+        test_all_report_file: ${{ steps.global.outputs.test_all_report_file }}
+        btest_report_file: ${{ steps.global.outputs.btest_report_file }}
+        test_spec_report_dir: ${{ steps.global.outputs.test_spec_report_dir }}
+
+    - name: make test-spec report directory in build directory
+      shell: bash
+      working-directory: ${{ inputs.builddir }}
+      run: mkdir "${test_spec_report_dir}"
+      if: ${{ steps.setup-launchable.outputs.test_spec_enabled == 'true' }}
+      env:
+        test_spec_report_dir: ${{ steps.global.outputs.test_spec_report_dir }}
+
+    - name: Clean up test results in Launchable
+      uses: gacts/run-and-post-run@81b6ce503cde93862cec047c54652e45c5dca991 # v1.4.3
+      with:
+        shell: bash
+        working-directory: ${{ inputs.builddir }}
+        post: |
+          rm -f "${test_all_report_file}"
+          rm -f "${btest_report_file}"
+          rm -fr "${test_spec_report_dir}"
+          rm -f launchable_stdout.log
+          rm -f launchable_stderr.log
+      if: always() && steps.setup-launchable.outcome == 'success'
+      env:
+        test_all_report_file: ${{ steps.global.outputs.test_all_report_file }}
+        btest_report_file: ${{ steps.global.outputs.btest_report_file }}
+        test_spec_report_dir: ${{ steps.global.outputs.test_spec_report_dir }}
+
+    - name: Record test results in Launchable
+      uses: gacts/run-and-post-run@81b6ce503cde93862cec047c54652e45c5dca991 # v1.4.3
+      with:
+        shell: bash
+        working-directory: ${{ inputs.builddir }}
+        post: |
+          if [[ "${test_all_enabled}" = "true" ]]; then \
+            launchable record attachment \
+              --session "${test_all_session}" \
+              "${stdout_report_path}" \
+              "${stderr_report_path}"; \
+            launchable record tests \
+              --session "${test_all_session}" \
+              raw "${test_all_report_file}" || true; \
+          fi
+
+          if [[ "${btest_enabled}" = "true" ]]; then \
+            launchable record attachment \
+              --session "${btest_session}" \
+              "${stdout_report_path}" \
+              "${stderr_report_path}"; \
+            launchable record tests \
+              --session "${btest_session}" \
+              raw "${btest_report_file}" || true; \
+          fi
+
+          if [[ "${test_spec_enabled}" = "true" ]]; then \
+            launchable record attachment \
+              --session "${test_spec_session}" \
+              "${stdout_report_path}" \
+              "${stderr_report_path}"; \
+            launchable record tests \
+              --session "${test_spec_session}" \
+              raw ${test_spec_report_dir}/* || true; \
+          fi
+      if: ${{ always() && steps.setup-launchable.outcome == 'success' }}
+      env:
+        test_all_report_file: ${{ steps.global.outputs.test_all_report_file }}
+        btest_report_file: ${{ steps.global.outputs.btest_report_file }}
+        test_spec_report_dir: ${{ steps.global.outputs.test_spec_report_dir }}
+        test_all_enabled: ${{ steps.global.outputs.test_all_enabled }}
+        btest_enabled: ${{ steps.global.outputs.btest_enabled }}
+        test_spec_enabled: ${{ steps.global.outputs.test_spec_enabled }}
+        test_all_session: ${{ steps.setup-launchable.outputs.test_all_session }}
+        btest_session: ${{ steps.setup-launchable.outputs.btest_session }}
+        test_spec_session: ${{ steps.setup-launchable.outputs.test_spec_session }}
+        stdout_report_path: ${{ steps.global.outputs.stdout_report_path }}
+        stderr_report_path: ${{ steps.global.outputs.stderr_report_path }}
+        LAUNCHABLE_SETUP_DIR: ${{ steps.setup-launchable.outputs.launchable_setup_dir }}
diff --git a/.github/actions/make-snapshot/action.yml b/.github/actions/make-snapshot/action.yml
new file mode 100644
index 0000000000..4552f0e067
--- /dev/null
+++ b/.github/actions/make-snapshot/action.yml
@@ -0,0 +1,77 @@
+name: 'make-snapshot'
+description: 'Make snapshot tarballs'
+inputs:
+  archname:
+    description: 'archname passed to tool/make-snapshot (e.g. snapshot-master)'
+    required: true
+  version:
+    description: 'Target Version'
+    required: false
+  shallow-since:
+    description: 'git fetch --shallow-since'
+    required: true
+    default: '2018-12-25 00:00:00'
+  fetch-branch:
+    description: 'fetch branch'
+    required: false
+  srcdir:
+    description: 'srcdir for tool/make-snapshot. Empty = clone ruby/ruby into ./ruby.'
+    required: false
+    default: ''
+  upload-artifact:
+    description: 'Upload Packages and Info as workflow artifacts. Pass "false" when callers run in a matrix that would collide on artifact names.'
+    required: false
+    default: 'true'
+
+runs:
+  using: "composite"
+  steps:
+    - name: Install libraries
+      run: |
+        set -x
+        sudo apt-get update -q || :
+        sudo apt-get install --no-install-recommends -q -y build-essential git bison autoconf ruby p7zip-full curl
+      shell: bash
+    - name: Checkout ruby/ruby for tool/make-snapshot
+      if: inputs.srcdir == ''
+      run: git clone --single-branch --depth=1 https://github.com/ruby/ruby ruby
+      shell: bash
+    - name: Fetch branches and notes (clone mode)
+      if: inputs.srcdir == ''
+      env:
+        SHALLOW_SINCE: ${{ inputs.shallow-since }}
+        FETCH_BRANCH: ${{ inputs.fetch-branch }}
+      run: |
+        set -x
+        cd ruby
+        git fetch --shallow-since="$SHALLOW_SINCE"
+        [ -n "$FETCH_BRANCH" ] && git fetch origin "+$FETCH_BRANCH:$FETCH_BRANCH"
+        git fetch origin '+refs/notes/commits:refs/notes/commits'
+        git fetch origin '+refs/notes/log-fix:refs/notes/log-fix'
+      shell: bash
+    - name: Fetch notes (local srcdir mode)
+      if: inputs.srcdir != ''
+      working-directory: ${{ inputs.srcdir }}
+      run: |
+        git fetch origin '+refs/notes/commits:refs/notes/commits' || :
+        git fetch origin '+refs/notes/log-fix:refs/notes/log-fix' || :
+      shell: bash
+    - name: Make snapshot
+      env:
+        ARCHNAME: ${{ inputs.archname }}
+        SRCDIR: ${{ inputs.srcdir }}
+        VERSION: ${{ inputs.version }}
+      run: |
+        [ -z "$SRCDIR" ] && SRCDIR=ruby
+        ruby "$SRCDIR/tool/make-snapshot" "-archname=$ARCHNAME" -srcdir="$SRCDIR" -packages=gzip,xz,zip pkg $VERSION
+      shell: bash
+    - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+      with:
+        name: Packages
+        path: pkg
+      if: ${{ inputs.upload-artifact == 'true' }}
+    - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+      with:
+        name: Info
+        path: pkg/info
+      if: ${{ inputs.upload-artifact == 'true' }}
diff --git a/.github/actions/setup/baseruby/action.yml b/.github/actions/setup/baseruby/action.yml
new file mode 100644
index 0000000000..76fe068897
--- /dev/null
+++ b/.github/actions/setup/baseruby/action.yml
@@ -0,0 +1,73 @@
+name: Setup directories etc.
+description: >-
+  Build baseruby for cross-compiling
+
+inputs:
+  srcdir:
+    required: true
+    default: ${{ github.workspace }}
+    description: >-
+      Directory of source codes.
+
+  builddir:
+    required: false
+    default: ${{ github.workspace }}/baseruby
+    description: >-
+      Where baseruby will be built.
+
+  installdir:
+    required: false
+    default: install
+    description: >-
+      The path where the baseruby will be installed to.
+      This is relative from the workspace.
+
+outputs:
+  ruby:
+    value: ${{ steps.build.outputs.installdir }}/bin/ruby
+    description: >-
+      The path of the executable baseruby.
+  dump_ast:
+    value: ${{ steps.build.outputs.installdir }}/bin/dump_ast
+    description: >-
+      The path of the executable dump_ast.
+
+runs:
+  using: composite
+
+  steps:
+    - name: Build baseruby
+      shell: bash
+      id: build
+      run: |
+        case "$installdir" in /*) ;; *) installdir="$PWD/$installdir";; esac
+        mkdir "$builddir"
+        ln -sr "$srcdir" "$builddir/.src"
+        pushd "$builddir"
+        .src/configure "--prefix=${installdir}" --disable-install-doc
+        CONFIGURE_ARGS=--with-out-ext=-test- make install
+        install dump_ast "${installdir}/bin"
+        {
+          echo "${installdir}/bin/dump_ast"
+          echo "${installdir}/.installed.list"
+          echo "${installdir}/"
+        } >> .installed.list
+        cp .installed.list "${installdir}/"
+        make distclean
+        rm .src
+        popd
+        rmdir "$builddir"
+        {
+          echo "installdir=${installdir}"
+        } | tee -a "$GITHUB_OUTPUT"
+      env:
+        srcdir: ${{ inputs.srcdir }}
+        builddir: ${{ inputs.builddir }}
+        installdir: ${{ inputs.installdir }}
+
+    - name: clean
+      uses: gacts/run-and-post-run@598d7a875d5620e0457490555b5e18e46082aa47 # v1.4.4
+      with:
+        working-directory: ${{ inputs.srcdir }}
+        post: |
+          ruby tool/rbuninstall.rb "${{ steps.build.outputs.installdir }}/.installed.list" > /dev/null
diff --git a/.github/actions/setup/directories/action.yml b/.github/actions/setup/directories/action.yml
new file mode 100644
index 0000000000..589049a4b8
--- /dev/null
+++ b/.github/actions/setup/directories/action.yml
@@ -0,0 +1,205 @@
+name: Setup directories etc.
+description: >-
+  Set up the source code and build directories (plus some
+  environmental tweaks)
+
+inputs:
+  srcdir:
+    required: false
+    default: ${{ github.workspace }}
+    description: >-
+      Directory to (re-)checkout source codes.  This will be created
+      if absent.  If there is no `configure` file that is also
+      generated inside.
+
+  builddir:
+    required: false
+    default: ${{ github.workspace }}
+    description: >-
+      Where binaries and other generated contents go.  This will be
+      created if absent.
+
+  make-command:
+    required: false
+    type: string
+    default: 'make'
+    description: >-
+      The command of `make`.
+
+  makeup:
+    required: false
+    type: boolean
+    # Note that `default: false` evaluates to a string constant
+    # `'false'`, which is a truthy value :sigh:
+    # https://github.com/actions/runner/issues/2238
+    default: ''
+    description: >-
+      If set to true, additionally runs `make up`.
+
+  checkout:
+    required: false
+    type: boolean
+    default: true
+    description: >-
+      If set to '' (false), skip running actions/checkout. This is useful when
+      you don't want to overwrite a GitHub token that is already set up.
+
+  dummy-files:
+    required: false
+    type: boolean
+    default: ''
+    description: >-
+      If set to true, creates dummy files in build dir.
+
+  fetch-depth:
+    required: false
+    default: '1'
+    description: The depth of commit history fetched from the remote repository
+
+  clean:
+    required: false
+    type: boolean
+    default: ''
+    description: >-
+      If set to true, clean build directory.
+
+outputs: {} # nothing?
+
+runs:
+  using: composite
+
+  steps:
+    # Note that `shell: bash` works on both Windows and Linux, but not
+    # `shell: sh`.  This is because GitHub hosted Windows runners have
+    # their bash manually installed.
+    - shell: bash
+      run: |
+        mkdir -p "${INPUT_SRCDIR}"
+        mkdir -p "${INPUT_BUILDDIR}"
+      env:
+        INPUT_SRCDIR: ${{ inputs.srcdir }}
+        INPUT_BUILDDIR: ${{ inputs.builddir }}
+
+    # Did you know that actions/checkout works without git(1)?  We are
+    # checking that here.
+    - id: which
+      shell: bash
+      run: |
+        echo "git=`command -v git`" >> "$GITHUB_OUTPUT"
+        echo "sudo=`sudo true && command -v sudo`" >> "$GITHUB_OUTPUT"
+        echo "autoreconf=`command -v autoreconf`" >> "$GITHUB_OUTPUT"
+
+    - if: steps.which.outputs.git
+      shell: bash
+      run: |
+        git config --global core.autocrlf false
+        git config --global core.eol lf
+        git config --global advice.detachedHead 0
+        git config --global init.defaultBranch garbage
+
+    - if: inputs.checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      with:
+        path: ${{ inputs.srcdir }}
+        fetch-depth: ${{ inputs.fetch-depth }}
+        persist-credentials: false
+
+    - uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+      with:
+        path: ${{ inputs.srcdir }}/.downloaded-cache
+        key: ${{ runner.os }}-${{ runner.arch }}-downloaded-cache
+
+    - if: steps.which.outputs.autoreconf
+      shell: bash
+      working-directory: ${{ inputs.srcdir }}
+      run: ./autogen.sh --install
+
+    # This is for MinGW.
+    - if: runner.os == 'Windows'
+      shell: bash
+      run: echo "GNUMAKEFLAGS=-j$((2 * NUMBER_OF_PROCESSORS))" >> $GITHUB_ENV # zizmor: ignore[github-env]
+
+    - if: runner.os == 'Linux'
+      shell: bash
+      run: echo "GNUMAKEFLAGS=-sj$((1 + $(nproc)))" >> "$GITHUB_ENV" # zizmor: ignore[github-env]
+
+    # macOS' GNU make is so old that they doesn't understand `GNUMAKEFLAGS`.
+    - if: runner.os == 'macOS'
+      shell: bash
+      run: echo "MAKEFLAGS=-j$((1 + $(sysctl -n hw.activecpu)))" >> "$GITHUB_ENV" # zizmor: ignore[github-env]
+
+    - if: inputs.makeup
+      shell: bash
+      working-directory: ${{ inputs.srcdir }}
+      run: |
+        touch config.status .rbconfig.time
+        for mk in Makefile GNUmakefile; do
+          sed -f tool/prereq.status template/$mk.in > $mk
+        done
+        make up
+
+    # Cleanup, runs even on failure
+    - if: always() && inputs.makeup
+      shell: bash
+      working-directory: ${{ inputs.srcdir }}
+      run: |
+        rm -f config.status .rbconfig.time \
+          Makefile GNUmakefile uncommon.mk enc.mk noarch-fake.rb
+        rm -f prism/.time prism/util/.time
+
+    - if: steps.which.outputs.sudo
+      shell: bash
+      run: |
+        sudo chmod -R go-w /usr/share
+        chmod -v go-w $HOME $HOME/.config || :
+        declare -a dirs # -A is not supported by old bash, e.g. macos
+        SAVE_IFS="$IFS" IFS=:; set $PATH
+        for d do
+          while [ -d "$d" ]; do
+            case "$IFS${dirs[*]}$IFS" in *"$IFS$d$IFS"*) ;; *) dirs+=("$d");; esac
+            d="${d%/*}"
+          done
+        done
+        IFS="$SAVE_IFS"
+        sudo chmod -v go-w "${dirs[@]}" || :
+
+    - if: inputs.dummy-files == 'true'
+      shell: bash
+      id: dummy-files
+      working-directory: ${{ inputs.builddir }}
+      run: |
+        : Create dummy files in build dir
+        set {{a..z},{A..Z},{0..9},foo,bar,test,zzz}.rb
+        for file; do \
+          echo > $file "raise 'do not load $file'"; \
+        done
+        # drop {a..z}.rb if case-insensitive filesystem
+        grep -F A.rb a.rb > /dev/null && set "${@:27}"
+        echo clean="cd ${INPUT_BUILDDIR} && rm $*" >> $GITHUB_OUTPUT
+      env:
+        INPUT_BUILDDIR: ${{ inputs.builddir }}
+
+    - if: inputs.clean == 'true'
+      shell: bash
+      id: clean
+      run: |
+        echo distclean="cd ${INPUT_BUILDDIR} && ${INPUT_MAKE_COMMAND} distclean" >> $GITHUB_OUTPUT
+        echo remained-files="find ${INPUT_BUILDDIR} -ls" >> $GITHUB_OUTPUT
+        [ "${INPUT_BUILDDIR}" = "${INPUT_SRCDIR}" ] ||
+        echo final="rmdir ${INPUT_BUILDDIR}" >> $GITHUB_OUTPUT
+      env:
+        INPUT_BUILDDIR: ${{ inputs.builddir }}
+        INPUT_SRCDIR: ${{ inputs.srcdir }}
+        INPUT_MAKE_COMMAND: ${{ inputs.make-command }}
+
+    - name: clean
+      uses: gacts/run-and-post-run@598d7a875d5620e0457490555b5e18e46082aa47 # v1.4.4
+      with:
+        working-directory:
+        post: |
+          ${{ steps.dummy-files.outputs.clean }}
+          ${{ steps.clean.outputs.distclean }}
+          ${{ steps.clean.outputs.remained-files }}
+          ${{ steps.clean.outputs.final }}
+      # rmdir randomly fails due to launchable files
+      continue-on-error: true
diff --git a/.github/actions/setup/macos/action.yml b/.github/actions/setup/macos/action.yml
new file mode 100644
index 0000000000..9cd37a9b12
--- /dev/null
+++ b/.github/actions/setup/macos/action.yml
@@ -0,0 +1,29 @@
+name: Setup macOS environment
+description: >-
+  Installs necessary packages via Homebrew.
+
+inputs: {} # nothing?
+
+outputs: {} # nothing?
+
+runs:
+  using: composite
+
+  steps:
+    - name: brew
+      shell: bash
+      run: |
+        brew install --quiet jemalloc gmp libffi openssl@3 zlib autoconf automake libtool
+
+    - name: Set ENV
+      shell: bash
+      run: | # zizmor: ignore[github-env]
+        dir_config() {
+          local args=() lib var="$1"; shift
+          for lib in "$@"; do
+            args+=("--with-${lib%@*}-dir=$(brew --prefix $lib)")
+          done
+          echo "$var=${args[*]}" >> $GITHUB_ENV
+        }
+        dir_config ruby_configure_args gmp
+        dir_config CONFIGURE_ARGS openssl@3
diff --git a/.github/actions/setup/ubuntu/action.yml b/.github/actions/setup/ubuntu/action.yml
new file mode 100644
index 0000000000..5209ccc03f
--- /dev/null
+++ b/.github/actions/setup/ubuntu/action.yml
@@ -0,0 +1,72 @@
+name: Setup ubuntu environment
+description: >-
+  At the beginning there was no way but to copy & paste `apt-get`
+  everywhere.  But now that we have composite actions, it seems better
+  merge them into one.
+
+inputs:
+  arch:
+    required: false
+    default: ''
+    description: >-
+      Architecture.  Because we run this on a GitHub-hosted runner
+      acceptable value for this input is very limited.
+
+outputs:
+  arch:
+    value: ${{ steps.uname.outputs.uname }}
+    description: >-
+      Actual architecture.  This could be different from the one
+      passed to the `inputs.arch`.  For instance giving `i386` to this
+      action yields `i686`.
+
+runs:
+  using: composite
+
+  steps:
+    - id: uname
+      name: uname
+      shell: bash
+      env:
+        arch: ${{ inputs.arch }}
+      run: |
+        setarch="${arch:+setarch $arch --}"
+        # normalize `uname`
+        if uname=$(${setarch} uname -m 2> /dev/null); then
+          # `setarch` works, `$arch` is a valid architecture name.
+          echo "setarch=${setarch}" >> "$GITHUB_OUTPUT"
+        else
+          # if `setarch` failed, take the given `arch` as-is.
+          uname="${arch}"
+          setarch=""
+        fi
+        echo "uname=$uname" >> "$GITHUB_OUTPUT"
+        echo "dpkg=${uname/686/386}" >> "$GITHUB_OUTPUT"
+
+    - name: set SETARCH
+      shell: bash
+      run: echo "SETARCH=${setarch}" >> "$GITHUB_ENV" # zizmor: ignore[github-env]
+      env:
+        setarch: ${{ steps.uname.outputs.setarch }} # validated
+
+    - name: dpkg setup
+      shell: bash
+      run: sudo dpkg --add-architecture "${dpkg}"
+      # `dpkg` is valid, also `uname`.
+      if: ${{ inputs.arch }}
+      env:
+        dpkg: ${{ steps.uname.outputs.dpkg }}
+
+    - name: apt-get
+      shell: bash
+      env:
+        arch: ${{ inputs.arch && format(':{0}', steps.uname.outputs.dpkg) || '' }}
+      run: |
+        set -x
+        sudo apt-get update -qq || :
+        sudo apt-get install --no-install-recommends -qq -y -o=Dpkg::Use-Pty=0 \
+        ${arch:+cross}build-essential${arch/:/-} \
+        libssl-dev${arch} libyaml-dev${arch} libreadline6-dev${arch} \
+        zlib1g-dev${arch} libncurses5-dev${arch} libffi-dev${arch} \
+        autoconf ruby
+        sudo apt-get install -qq -y pkg-config${arch} || :
diff --git a/.github/actions/slack/action.yml b/.github/actions/slack/action.yml
new file mode 100644
index 0000000000..6f89bef11a
--- /dev/null
+++ b/.github/actions/slack/action.yml
@@ -0,0 +1,51 @@
+name: Post a message to slack
+description: >-
+  We have our ruby/action-slack webhook.  However its arguments are
+  bit verbose to be listed in every workflow files.  Better merge them
+  into one.
+
+inputs:
+  SLACK_WEBHOOK_URL:
+    required: true
+    description: >-
+      The URL to post the payload.  This is an input because it tends
+      to be stored in a secrets vault and a composite action cannot
+      look into one.
+
+  label:
+    required: false
+    description: >-
+      Human-readable description of the run, something like "DEBUG=1".
+      This need not be unique among runs.
+
+  event_name:
+    required: false
+    default: 'push'
+    description: >-
+      Target event to trigger notification. Notify only push by default.
+
+  extra_channel_id:
+    required: false
+    description: >-
+      Slack channel ID to notify besides #alerts and #alerts-emoji.
+
+outputs: {} # Nothing?
+
+runs:
+  using: composite
+
+  steps:
+    - uses: ruby/action-slack@d260b61aa817726d5bedd22dd6cc305787fa4cdd # v4.0.0
+      with:
+        payload: |
+          {
+            "ci": "GitHub Actions",
+            "env": "${{ github.workflow }}${{ inputs.label && format(' / {0}', inputs.label) }}",
+            "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
+            "commit": "${{ github.sha }}",
+            "branch": "${{ github.ref_name }}"
+            ${{ inputs.extra_channel_id && format(', "extra_channel_id": "{0}"', inputs.extra_channel_id) }}
+          }
+      env:
+        SLACK_WEBHOOK_URL: ${{ inputs.SLACK_WEBHOOK_URL }}
+      if: ${{ github.event_name == inputs.event_name && startsWith(github.repository, 'ruby/') }}
diff --git a/.github/auto_request_review.yml b/.github/auto_request_review.yml
new file mode 100644
index 0000000000..9e20cb7459
--- /dev/null
+++ b/.github/auto_request_review.yml
@@ -0,0 +1,21 @@
+files:
+  'yjit*': [team:jit]
+  'yjit/**/*': [team:jit]
+  'yjit/src/cruby_bindings.inc.rs': []
+  'bootstraptest/test_yjit*': [team:jit]
+  'test/ruby/test_yjit*': [team:jit]
+  'zjit*': [team:jit]
+  'zjit/**/*': [team:jit]
+  'zjit/src/cruby_bindings.inc.rs': []
+  'test/ruby/test_zjit*': [team:jit]
+  'defs/jit.mk': [team:jit]
+  'tool/zjit_bisect.rb': [team:jit]
+  'doc/jit/*': [team:jit]
+  # Skip files updated by dependabot. It's noisy in notifications, and they're auto-merged anyway.
+  'yjit/Cargo.lock': []
+  'zjit/Cargo.lock': []
+  '.github/workflows/yjit-*.yml': []
+  '.github/workflows/zjit-*.yml': []
+options:
+  ignore_draft: true
+  last_files_match_only: true
diff --git a/.github/codeql/codeql-config.yml b/.github/codeql/codeql-config.yml
new file mode 100644
index 0000000000..f5d33545c1
--- /dev/null
+++ b/.github/codeql/codeql-config.yml
@@ -0,0 +1,22 @@
+paths-ignore:
+  - benchmark
+  - sample
+  - spec/ruby/command_line/fixtures
+  - spec/ruby/core/enumerable/shared/inject.rb
+  - spec/ruby/core/exception/fixtures
+  - spec/ruby/core/proc/parameters_spec.rb
+  - spec/ruby/core/proc/ruby2_keywords_spec.rb
+  - spec/ruby/core/range/reverse_each_spec.rb
+  - spec/ruby/language/fixtures
+  - spec/ruby/language/lambda_spec.rb
+  - spec/ruby/language/method_spec.rb
+  - spec/ruby/language/string_spec.rb
+  - test/error_highlight/test_error_highlight.rb
+  - test/prism/result/named_capture_test.rb
+  - test/ruby/test_call.rb
+  - test/ruby/test_signal.rb
+  - test/ruby/test_super.rb
+  - test/ruby/test_syntax.rb
+  - test/ruby/test_unicode_escape.rb
+  - test/rubygems/specifications/foo-0.0.1-x86-mswin32.gemspec
+  - trace_point.rb
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000000..57da742e5c
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,29 @@
+version: 2
+updates:
+  - package-ecosystem: 'github-actions'
+    directories:
+      - '/'
+      - '/.github/actions/slack'
+      - '/.github/actions/setup/directories'
+    schedule:
+      interval: 'daily'
+    groups:
+      github-actions:
+        patterns:
+          - "*"
+  - package-ecosystem: 'cargo'
+    directories:
+      - '/yjit'
+      - '/zjit'
+    exclude-paths:
+      - 'gc/mmtk/**'
+    schedule:
+      interval: 'monthly'
+    groups:
+      jit:
+        patterns:
+          - "*"
+  - package-ecosystem: 'vcpkg'
+    directory: '/'
+    schedule:
+      interval: 'daily'
diff --git a/.github/labeler.yml b/.github/labeler.yml
new file mode 100644
index 0000000000..f39fcec386
--- /dev/null
+++ b/.github/labeler.yml
@@ -0,0 +1,7 @@
+Documentation:
+- changed-files:
+  - all-globs-to-all-files: doc/**
+
+Backport:
+- base-branch: 'ruby_3_\d'
+- base-branch: 'ruby_4_\d'
diff --git a/.github/workflows/annocheck.yml b/.github/workflows/annocheck.yml
new file mode 100644
index 0000000000..1d23c38fcd
--- /dev/null
+++ b/.github/workflows/annocheck.yml
@@ -0,0 +1,111 @@
+name: Annocheck
+
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  compile:
+    name: test-annocheck
+
+    runs-on: ubuntu-latest
+
+    container:
+      image: ghcr.io/ruby/ruby-ci-image:gcc-11
+      options: --user root
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    env:
+      CONFIGURE_TTY: never
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+      RUBY_DEBUG: ci rgengc
+      RUBY_TESTOPTS: >-
+        -q
+        --color=always
+        --tty=no
+      # FIXME: Drop skipping options
+      # https://bugs.ruby-lang.org/issues/18061
+      # https://sourceware.org/annobin/annobin.html/Test-pie.html
+      TEST_ANNOCHECK_OPTS: '--skip-pie --skip-gaps'
+
+    steps:
+      - run: id
+        working-directory:
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout-cone-mode: false
+          sparse-checkout: /.github
+          persist-credentials: false
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: '3.1'
+          bundler: none
+
+      # Minimal flags to pass the check.
+      # -g0 disables backtraces when SEGV.  Do not set that.
+      - name: Run configure
+        run: >
+          ../src/configure -C
+          --enable-debug-env
+          --disable-install-doc
+          --with-ext=-test-/cxxanyargs,+
+          --without-valgrind
+          --without-jemalloc
+          --without-gmp
+          --with-gcc="gcc-11 -fcf-protection -Wa,--generate-missing-build-notes=yes"
+          --enable-shared
+          debugflags=-ggdb3
+          optflags=-O2
+          LDFLAGS=-Wl,-z,now
+
+      - run: make showflags
+
+      - run: make
+
+      - run: make test-annocheck
+
+      - uses: ./.github/actions/slack
+        with:
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+defaults:
+  run:
+    working-directory: build
diff --git a/.github/workflows/auto_request_review.yml b/.github/workflows/auto_request_review.yml
new file mode 100644
index 0000000000..1be2b11b86
--- /dev/null
+++ b/.github/workflows/auto_request_review.yml
@@ -0,0 +1,20 @@
+name: Auto Request Review
+on:
+  pull_request_target:
+    types: [opened, ready_for_review, reopened]
+    branches: [master]
+
+permissions:
+  contents: read
+
+jobs:
+  auto-request-review:
+    name: Auto Request Review
+    runs-on: ubuntu-latest
+    if: ${{ github.repository == 'ruby/ruby' && github.base_ref == 'master' }}
+    steps:
+      - name: Request review based on files changes and/or groups the author belongs to
+        uses: necojackarc/auto-request-review@5d3060495e58e9cb41f51de50e808d3135d5374e # master
+        with:
+          # scope: public_repo
+          token: ${{ secrets.MATZBOT_AUTO_REQUEST_REVIEW_TOKEN }}
diff --git a/.github/workflows/auto_review_pr.yml b/.github/workflows/auto_review_pr.yml
new file mode 100644
index 0000000000..24859ad0b0
--- /dev/null
+++ b/.github/workflows/auto_review_pr.yml
@@ -0,0 +1,41 @@
+name: Auto Review PR
+on:
+  pull_request_target:
+    types: [opened, ready_for_review, reopened]
+    branches: [master]
+  workflow_dispatch:
+    inputs:
+      pr_number:
+        description: 'PR number to review'
+        required: true
+        type: number
+
+permissions:
+  contents: read
+
+jobs:
+  auto-review-pr:
+    name: Auto Review PR
+    runs-on: ubuntu-latest
+    if: ${{ github.repository == 'ruby/ruby' && (github.base_ref == 'master' || github.event_name == 'workflow_dispatch') }}
+
+    permissions:
+      pull-requests: write
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: '3.4'
+          bundler: none
+
+      - name: Auto Review PR
+        run: ruby tool/auto_review_pr.rb "$GITHUB_PR_NUMBER"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_PR_NUMBER: ${{ github.event.pull_request.number || github.event.inputs.pr_number }}
diff --git a/.github/workflows/baseruby.yml b/.github/workflows/baseruby.yml
new file mode 100644
index 0000000000..1acfbe19ac
--- /dev/null
+++ b/.github/workflows/baseruby.yml
@@ -0,0 +1,76 @@
+name: BASERUBY Check
+
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  baseruby:
+    name: BASERUBY
+
+    runs-on: ubuntu-22.04
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    strategy:
+      matrix:
+        ruby:
+          - ruby-3.1
+          - ruby-3.2
+          - ruby-3.3
+
+    steps:
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler: none
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - uses: ./.github/actions/setup/ubuntu
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          makeup: true
+
+      - run: ./configure --disable-install-doc
+
+      - run: make all
+
+      - run: make test
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ${{ matrix.ruby }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
diff --git a/.github/workflows/bundled_gems.yml b/.github/workflows/bundled_gems.yml
new file mode 100644
index 0000000000..d890ed2495
--- /dev/null
+++ b/.github/workflows/bundled_gems.yml
@@ -0,0 +1,186 @@
+name: bundled_gems
+
+env:
+  UPDATE_ENABLED: true
+
+on:
+  push:
+    branches: ['master']
+    paths:
+      - '.github/workflows/bundled_gems.yml'
+      - 'gems/bundled_gems'
+  pull_request:
+    branches: ['master']
+    paths:
+      - '.github/workflows/bundled_gems.yml'
+      - 'gems/bundled_gems'
+  merge_group:
+  schedule:
+    - cron: '45 6 * * *'
+  workflow_dispatch:
+
+permissions: # added using https://github.com/step-security/secure-workflows
+  contents: read
+
+jobs:
+  update:
+    permissions:
+      contents: write # for Git to git push
+
+    if: ${{ github.event_name != 'schedule' || github.repository == 'ruby/ruby' }}
+
+    name: update ${{ github.workflow }}
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2 # zizmor: ignore[artipacked]
+        with:
+          token: ${{ (github.repository == 'ruby/ruby' && !startsWith(github.event_name, 'pull')) && secrets.MATZBOT_AUTO_UPDATE_TOKEN || secrets.GITHUB_TOKEN }}
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: 4.0
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          # Skip overwriting MATZBOT_AUTO_UPDATE_TOKEN
+          checkout: '' # false (ref: https://github.com/actions/runner/issues/2238)
+
+      - name: Set ENV
+        run: |
+          echo "TODAY=$(date +%F)" >> $GITHUB_ENV
+
+      - name: Download previous gems list
+        run: |
+          mkdir -p .downloaded-cache
+          for data in bundled_gems.json default_gems.json; do
+            ln -s .downloaded-cache/$data .
+            curl --retry 5 --retry-connrefused --retry-delay 2 --retry-max-time 60 -O -R -z ./$data https://stdgems.org/$data
+          done
+
+      - name: Update bundled gems list
+        id: bundled_gems
+        run: |
+          ruby -i~ tool/update-bundled_gems.rb gems/bundled_gems >> $GITHUB_OUTPUT
+        if: ${{ env.UPDATE_ENABLED == 'true' }}
+
+      - name: Maintain updated gems list in NEWS
+        run: |
+          ruby tool/update-NEWS-gemlist.rb bundled
+          ruby tool/update-NEWS-github-release.rb --update
+        if: ${{ env.UPDATE_ENABLED == 'true' }}
+
+      - name: Check diffs
+        id: diff
+        run: |
+          news= gems=
+          git diff --color --no-ext-diff --ignore-submodules --exit-code -- NEWS.md ||
+          news=true
+          git diff --color --no-ext-diff --ignore-submodules --exit-code -- gems/bundled_gems ||
+          gems=true
+          git add -- NEWS.md gems/bundled_gems
+          echo news=$news >> $GITHUB_OUTPUT
+          echo gems=$gems >> $GITHUB_OUTPUT
+          echo update=${news:-$gems} >> $GITHUB_OUTPUT
+
+      - name: Commit
+        id: commit
+        run: |
+          git pull --ff-only origin ${GITHUB_REF#refs/heads/}
+          message="Update bundled gems list"
+          if [ -z "${gems}" ]; then
+            git commit --message="[DOC] ${message} at ${GITHUB_SHA:0:30}"
+          else
+            git commit --message="${message} as of ${TODAY}"
+          fi
+        env:
+          TODAY: ${{ steps.bundled_gems.outputs.latest_date || env.TODAY }}
+          EMAIL: svn-admin@ruby-lang.org
+          GIT_AUTHOR_NAME: git
+          GIT_COMMITTER_NAME: git
+          gems: ${{ steps.diff.outputs.gems }}
+        if: ${{ steps.diff.outputs.update }}
+
+      - name: Development revision of bundled gems
+        run: |
+          #!ruby
+          file = "gems/bundled_gems"
+
+          SECONDS_IN_DAY = 86400
+          today = Time.new("#{ENV['TODAY']}Z")
+          if !(december = today.month == 12)
+            days = 30
+          elsif (days = 26 - today.day).positive?
+            days += 4
+          else
+            puts "::info:: just after released"
+            exit
+          end
+
+          since = "#{today.year-1}-12-26"
+          ref = ENV['GITHUB_REF']
+          puts "::group::\e[94mfetching \e[1m#{file}\e[22m since \e[1m#{since}\e[22m from \e[1m#{ref}\e[m"
+          system(*%W[git fetch --shallow-since=#{since} --no-tags origin #{ref}], exception: true)
+          puts "::endgroup::"
+
+          puts "\e[94mchecking development version bundled gems older than \e[1m#{days}\e[22m days\e[m"
+          limit = today.to_i - days * SECONDS_IN_DAY
+          old = 0
+          IO.popen(%W"git blame --line-porcelain -- #{file}") do |blame|
+            while head = blame.gets("\n\t") and s = blame.gets
+              next unless (gem = s.split(/\s+|#.*/)).size > 3
+              time = head[/^committer-time \K\d+/].to_i
+              next if (d = limit - time) <= 0
+              d /= SECONDS_IN_DAY
+              line = head[/\A\h+ \d+ \K\d+/].to_i
+              level = if d < days; 'warning'; else old += 1; 'error'; end
+              d += days
+              puts "::#{level} file=#{file},line=#{line},title=Older than #{d} days::#{gem[0]} #{gem[3]}"
+            end
+          end
+          abort "::error title=Too long-standing gems::The release comes soon." if december and old.nonzero?
+        shell: ruby {0}
+        env:
+          file: ${{ steps.logs.outputs.file }}
+          days: ${{ steps.logs.outputs.days }}
+
+      - name: Install libraries
+        uses: ./.github/actions/setup/ubuntu
+        if: ${{ steps.diff.outputs.gems }}
+
+      - name: Build
+        run: |
+          ./autogen.sh
+          ./configure -C --disable-install-doc
+          make
+        if: ${{ steps.diff.outputs.gems }}
+
+      - name: Prepare bundled gems
+        run: |
+          make -s prepare-gems
+        if: ${{ steps.diff.outputs.gems }}
+
+      - name: Test bundled gems
+        run: |
+          make -s test-bundled-gems
+        timeout-minutes: 30
+        env:
+          RUBY_TESTOPTS: '-q --tty=no'
+          TEST_BUNDLED_GEMS_ALLOW_FAILURES: ''
+        if: ${{ steps.diff.outputs.gems }}
+
+      - name: Push
+        run: |
+          git push origin ${GITHUB_REF#refs/heads/}
+        if: >-
+          ${{
+          github.repository == 'ruby/ruby' &&
+          !startsWith(github.event_name, 'pull') &&
+          steps.commit.outcome == 'success'
+          }}
+
+      - uses: ./.github/actions/slack
+        with:
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
diff --git a/.github/workflows/check_dependencies.yml b/.github/workflows/check_dependencies.yml
new file mode 100644
index 0000000000..ad399b264f
--- /dev/null
+++ b/.github/workflows/check_dependencies.yml
@@ -0,0 +1,61 @@
+name: Check Dependencies
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  update-deps:
+    name: Dependency checks
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+      fail-fast: true
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - uses: ./.github/actions/setup/ubuntu
+        if: ${{ contains(matrix.os, 'ubuntu') }}
+
+      - uses: ./.github/actions/setup/macos
+        if: ${{ contains(matrix.os, 'macos') }}
+
+      - uses: ./.github/actions/setup/directories
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: '3.1'
+          bundler: none
+
+      - name: Run configure
+        run: ./configure -C --disable-install-doc --disable-rubygems --with-gcc 'optflags=-O0' 'debugflags=-save-temps=obj -g'
+
+      - run: make fix-depends
+
+      - run: git diff --color --no-ext-diff --ignore-submodules --exit-code
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ${{ matrix.os }} / Dependencies need to update
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
diff --git a/.github/workflows/check_misc.yml b/.github/workflows/check_misc.yml
new file mode 100644
index 0000000000..f194d00779
--- /dev/null
+++ b/.github/workflows/check_misc.yml
@@ -0,0 +1,151 @@
+name: Misc
+on: [push, pull_request, merge_group]
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  checks:
+    name: Miscellaneous checks
+
+    permissions:
+      contents: write # for Git to git push
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          token: ${{ (github.repository == 'ruby/ruby' && !startsWith(github.event_name, 'pull')) && secrets.MATZBOT_AUTO_UPDATE_TOKEN || secrets.GITHUB_TOKEN }}
+          persist-credentials: false
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: head
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          makeup: true
+          # Skip overwriting MATZBOT_AUTO_UPDATE_TOKEN
+          checkout: '' # false (ref: https://github.com/actions/runner/issues/2238)
+
+      - name: Re-generate Makefiles
+        run: |
+          # config.status needs to run as a shell script
+          { echo ':&&exit'; cat tool/prereq.status; } > config.status
+          : # same as actions/setup/directories/action.yml
+          for mk in Makefile GNUmakefile; do
+            sed -f tool/prereq.status template/$mk.in > $mk
+          done
+
+      - name: Check for code styles
+        run: |
+          set -x
+          ruby tool/auto-style.rb "$GITHUB_OLD_SHA" "$GITHUB_NEW_SHA"
+        env:
+          GITHUB_OLD_SHA: ${{ github.event.pull_request.base.sha }}
+          GITHUB_NEW_SHA: ${{ github.event.pull_request.merge_commit_sha }}
+        # Skip 'push' events because post_push.yml fixes them on push
+        if: ${{ github.repository == 'ruby/ruby' && startsWith(github.event_name, 'pull') }}
+
+      - name: Check if date in man pages is up-to-date
+        run: |
+          git fetch origin --depth=1 "${GITHUB_OLD_SHA}"
+          git diff --exit-code --name-only "${GITHUB_OLD_SHA}" HEAD -- man ||
+          make V=1 GIT=git BASERUBY=ruby update-man-date
+          git diff --color --no-ext-diff --ignore-submodules --exit-code -- man
+        env:
+          GITHUB_OLD_SHA: ${{ github.event.pull_request.base.sha }}
+        if: ${{ startsWith(github.event_name, 'pull') }}
+
+      - name: Check for bash specific substitution in configure.ac
+        run: |
+          git grep -n '\${[A-Za-z_0-9]*/' -- configure.ac && exit 1 || :
+
+      - name: Check for header macros
+        run: |
+          fail=
+          for header in ruby/*.h; do
+            git grep -l -F -e $header -e HAVE_`echo $header | tr a-z./ A-Z__` -- . > /dev/null && continue
+            fail=1
+            echo $header
+          done
+          exit $fail
+        working-directory: include
+
+      - id: now
+        run: |
+          date +"mon=%-m"%n"day=%-d" >> $GITHUB_OUTPUT
+        env:
+          TZ: Asia/Tokyo
+
+      - id: deprecation
+        run: |
+          eval $(sed -n 's/^#define RUBY_API_VERSION_\(MAJOR\|MINOR\) /\1=/p' include/ruby/version.h)
+          if git --no-pager grep --color -o 'rb_warn_deprecated_to_remove_at('$MAJOR'\.'$MINOR',.*' -- '*.c' >&2; then
+              false
+          else
+              true
+          fi
+        continue-on-error: ${{ steps.now.outputs.mon < 12 }}
+
+      - name: Check if to generate documents
+        id: rdoc
+        run: |
+          set -- $(sed 's/#.*//;/^rdoc /!d' gems/bundled_gems)
+          { echo version=$2; echo ref=$4; } >> $GITHUB_OUTPUT
+
+      - name: Checkout rdoc
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          repository: ruby/rdoc
+          ref: ${{ steps.rdoc.outputs.ref }}
+          path: .bundle/gems/rdoc-${{ steps.rdoc.outputs.version }}
+          persist-credentials: false
+        if: ${{ steps.rdoc.outputs.ref != '' }}
+
+      - name: Generate rdoc scripts
+        run: |
+          set -x
+          gempath=$(ruby -e 'print Gem.user_dir, "/bin"')
+          PATH=$gempath:$PATH
+          gem install --user bundler
+          bundle config --local path vendor/bundle
+          bundle install --jobs 4
+          bundle exec rake generate
+        working-directory: .bundle/gems/rdoc-${{ steps.rdoc.outputs.version }}
+        if: ${{ steps.rdoc.outputs.ref != '' }}
+
+      - name: Core docs coverage
+        run: |
+          make XRUBY=ruby RDOC_DEPENDS= RBCONFIG=update-rbconfig rdoc-coverage
+
+      - name: Generate docs
+        id: docs
+        run: |
+          make XRUBY=ruby RDOC_DEPENDS= RBCONFIG=update-rbconfig HTMLOUT=html html
+          echo htmlout=ruby-html-${GITHUB_SHA:0:10} >> $GITHUB_OUTPUT
+        # Generate only when document commit/PR
+        if: >-
+          ${{false
+          || contains(github.event.head_commit.message, '[ruby/rdoc]')
+          || contains(github.event.head_commit.message, '[DOC]')
+          || contains(github.event.pull_request.title, '[DOC]')
+          || contains(github.event.pull_request.labels.*.name, 'Documentation')
+          }}
+
+      - name: Upload docs
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          path: html
+          name: ${{ steps.docs.outputs.htmlout }}
+        if: ${{ steps.docs.outcome == 'success' }}
+
+      - uses: ./.github/actions/slack
+        with:
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
diff --git a/.github/workflows/check_sast.yml b/.github/workflows/check_sast.yml
new file mode 100644
index 0000000000..6fd1be6542
--- /dev/null
+++ b/.github/workflows/check_sast.yml
@@ -0,0 +1,133 @@
+name: 'Check SAST tool'
+
+on:
+  push:
+    branches: ['master']
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  schedule:
+    - cron: '0 12 * * *'
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions: # added using https://github.com/step-security/secure-workflows
+  contents: read
+
+jobs:
+  zizmor:
+    name: zizmor
+
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      security-events: write
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Run zizmor
+        uses: zizmorcore/zizmor-action@5f14fd08f7cf1cb1609c1e344975f152c7ee938d # v0.5.6
+        continue-on-error: true
+
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read # for github/codeql-action/init to get workflow details
+      contents: read # for actions/checkout to fetch code
+      security-events: write # for github/codeql-action/upload-sarif to send a status report
+    # CodeQL fails to run pull requests from dependabot due to missing write access to upload results.
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - language: cpp
+          - language: ruby
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@7211b7c8077ea37d8641b6271f6a365a22a5fbfa # v4.36.0
+        with:
+          languages: ${{ matrix.language }}
+          build-mode: none
+          config-file: .github/codeql/codeql-config.yml
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@7211b7c8077ea37d8641b6271f6a365a22a5fbfa # v4.36.0
+        with:
+          category: '/language:${{ matrix.language }}'
+          upload: False
+          output: sarif-results
+
+      - name: filter-sarif
+        uses: advanced-security/filter-sarif@2da736ff05ef065cb2894ac6892e47b5eac2c3c0 # v1.1
+        with:
+          patterns: |
+            +**/*.rb
+            -lib/uri/mailto.rb:rb/overly-large-range
+            -lib/uri/rfc3986_parser.rb:rb/overly-large-range
+            -lib/bundler/vendor/uri/lib/uri/mailto.rb:rb/overly-large-range
+            -lib/bundler/vendor/uri/lib/uri/rfc3986_parser.rb:rb/overly-large-range
+            -spec/ruby/core/regexp/timeout_spec.rb:rb/redos
+            -test/ruby/test_io.rb:rb/non-constant-kernel-open
+            -test/open-uri/test_open-uri.rb:rb/non-constant-kernel-open
+            -test/open-uri/test_ssl.rb:rb/non-constant-kernel-open
+            -spec/ruby/core/io/binread_spec.rb:rb/non-constant-kernel-open
+            -spec/ruby/core/io/readlines_spec.rb:rb/non-constant-kernel-open
+            -spec/ruby/core/io/foreach_spec.rb:rb/non-constant-kernel-open
+            -spec/ruby/core/io/write_spec.rb:rb/non-constant-kernel-open
+            -spec/ruby/core/io/read_spec.rb:rb/non-constant-kernel-open
+            -spec/ruby/core/kernel/open_spec.rb:rb/non-constant-kernel-open
+          input: sarif-results/${{ matrix.language }}.sarif
+          output: sarif-results/${{ matrix.language }}.sarif
+        if: ${{ matrix.language == 'ruby' }}
+        continue-on-error: true
+
+      - name: filter-sarif
+        uses: advanced-security/filter-sarif@2da736ff05ef065cb2894ac6892e47b5eac2c3c0 # v1.1
+        with:
+          patterns: |
+            +**/*.c
+            +**/*.h
+          input: sarif-results/${{ matrix.language }}.sarif
+          output: sarif-results/${{ matrix.language }}.sarif
+        if: ${{ matrix.language == 'cpp' }}
+        continue-on-error: true
+
+      - name: Upload SARIF
+        uses: github/codeql-action/upload-sarif@7211b7c8077ea37d8641b6271f6a365a22a5fbfa # v4.36.0
+        with:
+          sarif_file: sarif-results/${{ matrix.language }}.sarif
+        continue-on-error: true
diff --git a/.github/workflows/compilers.yml b/.github/workflows/compilers.yml
new file mode 100644
index 0000000000..147470f38a
--- /dev/null
+++ b/.github/workflows/compilers.yml
@@ -0,0 +1,333 @@
+# Some tests depending on this name 'Compilations' via $GITHUB_WORKFLOW. Make sure to update such tests when renaming this workflow.
+name: Compilations
+
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+# Each job is split so that they roughly take 30min to run through.
+jobs:
+  compile-if:
+    name: 'omnibus compilations, trigger'
+    runs-on: ubuntu-latest
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+    steps:
+      - run: true
+        working-directory:
+
+  compile1:
+    name: 'omnibus compilations, #1'
+    runs-on: ubuntu-latest
+    needs: compile-if
+    if: ${{ needs.compile-if.result == 'success' }}
+    timeout-minutes: 60
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
+      # Set fetch-depth: 10 so that Launchable can receive commits information.
+      - { uses: './.github/actions/setup/directories', with: { srcdir: 'src', builddir: 'build', makeup: true, fetch-depth: 10 } }
+      - name: 'clang 22 LTO'
+        uses: './.github/actions/compilers'
+        with:
+          tag: clang-22
+          with_gcc: 'clang-22 -flto=auto'
+          optflags: '-O2'
+          enable_shared: false
+        timeout-minutes: 30
+      - { uses: './.github/actions/compilers', name: '-O0', with: { optflags: '-O0 -march=x86-64 -mtune=generic' }, timeout-minutes: 5 }
+      # - { uses: './.github/actions/compilers', name: '-O3', with: { optflags: '-O3 -march=x86-64 -mtune=generic', check: true } }
+
+  compile2:
+    name: 'omnibus compilations, #2'
+    runs-on: ubuntu-latest
+    needs: compile-if
+    if: ${{ needs.compile-if.result == 'success' }}
+    timeout-minutes: 60
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
+      - { uses: './.github/actions/setup/directories', with: { srcdir: 'src', builddir: 'build', makeup: true, fetch-depth: 10 } }
+      - name: 'GCC 15 LTO'
+        uses: './.github/actions/compilers'
+        with:
+          tag: gcc-15
+          with_gcc: 'gcc-15 -flto=auto -ffat-lto-objects -Werror=lto-type-mismatch'
+          optflags: '-O2'
+          enable_shared: false
+        timeout-minutes: 10
+      - { uses: './.github/actions/compilers', name: 'ext/Setup', with: { static_exts: 'etc json/* */escape' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GCC 15', with: { tag: 'gcc-15' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GCC 14', with: { tag: 'gcc-14' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GCC 13', with: { tag: 'gcc-13' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GCC 12', with: { tag: 'gcc-12' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GCC 11', with: { tag: 'gcc-11' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GCC 10', with: { tag: 'gcc-10' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GCC 9',  with: { tag: 'gcc-9'  }, timeout-minutes: 5 }
+
+  compile3:
+    name: 'omnibus compilations, #3'
+    runs-on: ubuntu-latest
+    needs: compile-if
+    if: ${{ needs.compile-if.result == 'success' }}
+    timeout-minutes: 60
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
+      - { uses: './.github/actions/setup/directories', with: { srcdir: 'src', builddir: 'build', makeup: true, fetch-depth: 10 } }
+      - { uses: './.github/actions/compilers', name: 'clang 20', with: { tag: 'clang-20' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 19', with: { tag: 'clang-19' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 18', with: { tag: 'clang-18' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 17', with: { tag: 'clang-17' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 16', with: { tag: 'clang-16' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 15', with: { tag: 'clang-15' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 14', with: { tag: 'clang-14' }, timeout-minutes: 5 }
+
+  compile4:
+    name: 'omnibus compilations, #4'
+    runs-on: ubuntu-latest
+    needs: compile-if
+    if: ${{ needs.compile-if.result == 'success' }}
+    timeout-minutes: 60
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
+      - { uses: './.github/actions/setup/directories', with: { srcdir: 'src', builddir: 'build', makeup: true, fetch-depth: 10 } }
+      - { uses: './.github/actions/compilers', name: 'clang 13', with: { tag: 'clang-13' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 12', with: { tag: 'clang-12' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 11', with: { tag: 'clang-11' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 10', with: { tag: 'clang-10' }, timeout-minutes: 5 }
+        # llvm-objcopy<=9 doesn't have --wildcard. It compiles, but leaves Rust symbols in libyjit.o and fail `make test-leaked-globals`.
+      - { uses: './.github/actions/compilers', name: 'clang 9',  with: { tag: 'clang-9',   append_configure: '--disable-yjit --disable-zjit' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 8',  with: { tag: 'clang-8',   append_configure: '--disable-yjit --disable-zjit' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 7',  with: { tag: 'clang-7',   append_configure: '--disable-yjit --disable-zjit' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 6',  with: { tag: 'clang-6.0', append_configure: '--disable-yjit --disable-zjit' }, timeout-minutes: 5 }
+
+  compile5:
+    name: 'omnibus compilations, #5'
+    runs-on: ubuntu-latest
+    needs: compile-if
+    if: ${{ needs.compile-if.result == 'success' }}
+    timeout-minutes: 60
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
+      - { uses: './.github/actions/setup/directories', with: { srcdir: 'src', builddir: 'build', makeup: true, fetch-depth: 10 } }
+      # -Wno-strict-prototypes is necessary with current clang-15 since
+      # older autoconf generate functions without prototype and -pedantic
+      # now implies strict-prototypes. Disabling the error but leaving the
+      # warning generates a lot of noise from use of ANYARGS in
+      # rb_define_method() and friends.
+      # See: https://github.com/llvm/llvm-project/commit/11da1b53d8cd3507959022cd790d5a7ad4573d94
+      - { uses: './.github/actions/compilers', name: 'C99',      with: { CFLAGS: '-std=c99 -Werror=pedantic -pedantic-errors -Wno-strict-prototypes' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'C11',   with: { CFLAGS:   '-std=c11   -Werror=pedantic -pedantic-errors -Wno-strict-prototypes' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'C17',   with: { CFLAGS:   '-std=c17   -Werror=pedantic -pedantic-errors -Wno-strict-prototypes' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'C23',   with: { CFLAGS:   '-std=c2x   -Werror=pedantic -pedantic-errors -Wno-strict-prototypes' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'C++98', with: { CXXFLAGS: '-std=c++98 -Werror=pedantic -pedantic-errors -Wno-c++11-long-long' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'C++11', with: { CXXFLAGS: '-std=c++11 -Werror=pedantic -pedantic-errors -Wno-c++11-long-long' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'C++14', with: { CXXFLAGS: '-std=c++14 -Werror=pedantic -pedantic-errors -Wno-c++11-long-long' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'C++17', with: { CXXFLAGS: '-std=c++17 -Werror=pedantic -pedantic-errors -Wno-c++11-long-long' }, timeout-minutes: 5 }
+
+  compile6:
+    name: 'omnibus compilations, #6'
+    runs-on: ubuntu-latest
+    needs: compile-if
+    if: ${{ needs.compile-if.result == 'success' }}
+    timeout-minutes: 60
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
+      - { uses: './.github/actions/setup/directories', with: { srcdir: 'src', builddir: 'build', makeup: true, fetch-depth: 10 } }
+      - { uses: './.github/actions/compilers', name: 'C++20', with: { CXXFLAGS: '-std=c++20 -Werror=pedantic -pedantic-errors -Wno-c++11-long-long' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'C++23', with: { CXXFLAGS: '-std=c++23 -Werror=pedantic -pedantic-errors -Wno-c++11-long-long' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'C++26', with: { CXXFLAGS: '-std=c++26 -Werror=pedantic -pedantic-errors -Wno-c++11-long-long' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'gmp',                 with: { append_configure: '--with-gmp', test_all: 'ruby/test_bignum.rb', test_spec: "/github/workspace/src/spec/ruby/core/integer" }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'jemalloc',            with: { append_configure: '--with-jemalloc' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'valgrind',            with: { append_configure: '--with-valgrind' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'coroutine=ucontext',  with: { append_configure: '--with-coroutine=ucontext' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'coroutine=pthread',   with: { append_configure: '--with-coroutine=pthread' }, timeout-minutes: 5 }
+
+  compile7:
+    name: 'omnibus compilations, #7'
+    runs-on: ubuntu-latest
+    needs: compile-if
+    if: ${{ needs.compile-if.result == 'success' }}
+    timeout-minutes: 60
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
+      - { uses: './.github/actions/setup/directories', with: { srcdir: 'src', builddir: 'build', makeup: true, fetch-depth: 10 } }
+      - { uses: './.github/actions/compilers', name: 'disable-jit',         with: { append_configure: '--disable-yjit --disable-zjit' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'disable-yjit',        with: { append_configure: '--disable-yjit' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'disable-zjit',        with: { append_configure: '--disable-zjit' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'disable-dln',         with: { append_configure: '--disable-dln' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'enable-mkmf-verbose', with: { append_configure: '--enable-mkmf-verbose' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'disable-rubygems',    with: { append_configure: '--disable-rubygems' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'RUBY_DEVEL',          with: { append_configure: '--enable-devel' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'OPT_THREADED_CODE=0',            with: { cppflags: '-DOPT_THREADED_CODE=0' }, timeout-minutes: 5 }
+
+  compile8:
+    name: 'omnibus compilations, #8'
+    runs-on: ubuntu-latest
+    needs: compile-if
+    if: ${{ needs.compile-if.result == 'success' }}
+    timeout-minutes: 60
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
+      - { uses: './.github/actions/setup/directories', with: { srcdir: 'src', builddir: 'build', makeup: true, fetch-depth: 10 } }
+      - { uses: './.github/actions/compilers', name: 'NDEBUG',                         with: { cppflags: '-DNDEBUG' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'RUBY_DEBUG',                     with: { cppflags: '-DRUBY_DEBUG' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'ARRAY_DEBUG',                    with: { cppflags: '-DARRAY_DEBUG' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'CCAN_LIST_DEBUG',                with: { cppflags: '-DCCAN_LIST_DEBUG' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'CPDEBUG=-1',                     with: { cppflags: '-DCPDEBUG=-1' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'ENC_DEBUG',                      with: { cppflags: '-DENC_DEBUG' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GC_DEBUG',                       with: { cppflags: '-DGC_DEBUG' }, timeout-minutes: 5 }
+
+  compile9:
+    name: 'omnibus compilations, #9'
+    runs-on: ubuntu-latest
+    needs: compile-if
+    if: ${{ needs.compile-if.result == 'success' }}
+    timeout-minutes: 60
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
+      - { uses: './.github/actions/setup/directories', with: { srcdir: 'src', builddir: 'build', makeup: true, fetch-depth: 10 } }
+      - { uses: './.github/actions/compilers', name: 'HASH_DEBUG',                     with: { cppflags: '-DHASH_DEBUG' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'ID_TABLE_DEBUG',                 with: { cppflags: '-DID_TABLE_DEBUG' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'RGENGC_DEBUG=-1',                with: { cppflags: '-DRGENGC_DEBUG=-1' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'SYMBOL_DEBUG',                   with: { cppflags: '-DSYMBOL_DEBUG' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'RGENGC_CHECK_MODE',              with: { cppflags: '-DRGENGC_CHECK_MODE' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'VM_CHECK_MODE',                  with: { cppflags: '-DVM_CHECK_MODE' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'USE_EMBED_CI=0',                 with: { cppflags: '-DUSE_EMBED_CI=0' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'USE_FLONUM=0',                   with: { cppflags: '-DUSE_FLONUM=0', append_configure: '--disable-yjit --disable-zjit' }, timeout-minutes: 5 }
+
+  compileX:
+    name: 'omnibus compilations, #10'
+    runs-on: ubuntu-latest
+    needs: compile-if
+    if: ${{ needs.compile-if.result == 'success' }}
+    timeout-minutes: 60
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
+      - { uses: './.github/actions/setup/directories', with: { srcdir: 'src', builddir: 'build', makeup: true, fetch-depth: 10 } }
+      - { uses: './.github/actions/compilers', name: 'USE_LAZY_LOAD',                  with: { cppflags: '-DUSE_LAZY_LOAD' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'USE_RUBY_DEBUG_LOG=1',           with: { cppflags: '-DUSE_RUBY_DEBUG_LOG=1' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'USE_DEBUG_COUNTER',              with: { cppflags: '-DUSE_DEBUG_COUNTER=1' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'SHARABLE_MIDDLE_SUBSTRING',      with: { cppflags: '-DSHARABLE_MIDDLE_SUBSTRING=1' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'DEBUG_FIND_TIME_NUMGUESS',       with: { cppflags: '-DDEBUG_FIND_TIME_NUMGUESS' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'DEBUG_INTEGER_PACK',             with: { cppflags: '-DDEBUG_INTEGER_PACK' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'OPT_THREADED_CODE=1',            with: { cppflags: '-DOPT_THREADED_CODE=1' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'OPT_THREADED_CODE=2',            with: { cppflags: '-DOPT_THREADED_CODE=2' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 21', with: { tag: 'clang-21' }, timeout-minutes: 5 }
+
+  compileB:
+    name: 'omnibus compilations, #11'
+    runs-on: ubuntu-latest
+    needs: compile-if
+    if: ${{ needs.compile-if.result == 'success' }}
+    timeout-minutes: 60
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
+      - { uses: './.github/actions/setup/directories', with: { srcdir: 'src', builddir: 'build', makeup: true, fetch-depth: 10 } }
+      - { uses: './.github/actions/compilers', name: 'GC_DEBUG_STRESS_TO_CLASS',       with: { cppflags: '-DGC_DEBUG_STRESS_TO_CLASS' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GC_ENABLE_LAZY_SWEEP=0',         with: { cppflags: '-DGC_ENABLE_LAZY_SWEEP=0' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GC_PROFILE_DETAIL_MEMORY',       with: { cppflags: '-DGC_PROFILE_DETAIL_MEMORY' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GC_PROFILE_MORE_DETAIL',         with: { cppflags: '-DGC_PROFILE_MORE_DETAIL' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'MALLOC_ALLOCATED_SIZE_CHECK',    with: { cppflags: '-DMALLOC_ALLOCATED_SIZE_CHECK' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'RGENGC_ESTIMATE_OLDMALLOC',      with: { cppflags: '-DRGENGC_ESTIMATE_OLDMALLOC' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'RGENGC_PROFILE',                 with: { cppflags: '-DRGENGC_PROFILE' }, timeout-minutes: 5 }
+
+  compileC:
+    name: 'omnibus compilations, #12'
+    runs-on: ubuntu-latest
+    needs: compile-if
+    if: ${{ needs.compile-if.result == 'success' }}
+    timeout-minutes: 60
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
+      - { uses: './.github/actions/setup/directories', with: { srcdir: 'src', builddir: 'build', makeup: true, fetch-depth: 10 } }
+      - { uses: './.github/actions/compilers', name: 'VM_DEBUG_BP_CHECK',              with: { cppflags: '-DVM_DEBUG_BP_CHECK' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'VM_DEBUG_VERIFY_METHOD_CACHE',   with: { cppflags: '-DVM_DEBUG_VERIFY_METHOD_CACHE' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'YJIT_FORCE_ENABLE',              with: { cppflags: '-DYJIT_FORCE_ENABLE' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'UNIVERSAL_PARSER',               with: { cppflags: '-DUNIVERSAL_PARSER' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 23', with: { tag: 'clang-23' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 22', with: { tag: 'clang-22' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GCC 8',  with: { tag: 'gcc-8'  }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GCC 7',  with: { tag: 'gcc-7'  }, timeout-minutes: 5 }
+
+  compilemax:
+    name: 'omnibus compilations, result'
+    runs-on: ubuntu-latest
+    if: ${{ always() }}
+    needs:
+      - 'compile1'
+      - 'compile2'
+      - 'compile3'
+      - 'compile4'
+      - 'compile5'
+      - 'compile6'
+      - 'compile7'
+      - 'compile8'
+      - 'compile9'
+      - 'compileX'
+      - 'compileB'
+      - 'compileC'
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
+      - uses: ./.github/actions/slack
+        with:
+          label: 'omnibus'
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
+      - run: false
+        working-directory:
+        if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
+
+defaults:
+  run:
+    working-directory: build
diff --git a/.github/workflows/crosscompile.yml b/.github/workflows/crosscompile.yml
new file mode 100644
index 0000000000..4c28516e25
--- /dev/null
+++ b/.github/workflows/crosscompile.yml
@@ -0,0 +1,123 @@
+name: Cross compile
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    # Do not use paths-ignore for required status checks
+    # https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/troubleshooting-required-status-checks
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  make:
+    name: make (${{ matrix.host }} host on ${{ matrix.build }})
+    strategy:
+      matrix:
+        include:
+          - host: aarch64-linux-gnu
+            arch: arm64
+            build: x86_64-linux-gnu
+            runs-on: ubuntu-24.04
+            file_arch: ARM aarch64
+          - host: x86_64-linux-gnu
+            arch: amd64
+            build: aarch64-linux-gnu
+            runs-on: ubuntu-24.04-arm
+            file_arch: x86-64
+      fail-fast: false
+
+    env:
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+
+    runs-on: ${{ matrix.runs-on }}
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout-cone-mode: false
+          sparse-checkout: /.github
+          persist-credentials: false
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+
+      - name: Setup cross-compilation toolchain sources
+        run: |
+          native_arch=$(dpkg --print-architecture)
+          # Restrict existing sources to native arch
+          sudo sed -i '/^Architectures:/d' /etc/apt/sources.list.d/ubuntu.sources
+          sudo sed -i "/^Types:/a Architectures: ${native_arch}" /etc/apt/sources.list.d/ubuntu.sources
+          # Add cross-arch sources
+          if [ "${{ matrix.arch }}" = "arm64" ]; then
+            cross_uri="http://ports.ubuntu.com/"
+          else
+            cross_uri="http://archive.ubuntu.com/ubuntu/"
+          fi
+          printf '%s\n' \
+            "Types: deb" \
+            "URIs: ${cross_uri}" \
+            "Suites: noble noble-updates noble-security" \
+            "Components: main universe" \
+            "Architectures: ${{ matrix.arch }}" \
+            | sudo tee /etc/apt/sources.list.d/cross-${{ matrix.arch }}.sources
+
+      - uses: ./.github/actions/setup/ubuntu
+        with:
+          arch: ${{ matrix.arch }}
+
+      - uses: ./.github/actions/setup/baseruby
+        id: baseruby
+        with:
+          srcdir: src
+
+      - name: Run configure
+        run: >-
+          ../src/configure -C --disable-install-doc
+          --prefix=/usr
+          --build=${{ matrix.build }}
+          --host=${{ matrix.host }}
+          --with-baseruby="$baseruby"
+        env:
+          baseruby: ${{ steps.baseruby.outputs.ruby }}
+
+      - run: make
+
+      - run: make install DESTDIR=$PWD/install
+
+      - name: Verify cross-compiled binary
+        run: |
+          file install/usr/bin/ruby
+          file install/usr/bin/ruby | grep -q '${{ matrix.file_arch }}'
+
+      - uses: ./.github/actions/slack
+        with:
+          label: cross ${{ matrix.host }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+defaults:
+  run:
+    working-directory: build
diff --git a/.github/workflows/cygwin.yml b/.github/workflows/cygwin.yml
new file mode 100644
index 0000000000..5ab86c7b19
--- /dev/null
+++ b/.github/workflows/cygwin.yml
@@ -0,0 +1,75 @@
+name: Cygwin
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  make:
+    runs-on: windows-2022
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    steps:
+      - run: git config --global core.autocrlf input
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Setup Cygwin
+        uses: cygwin/cygwin-install-action@711d29f3da23c9f4a1798e369a6f01198c13b11a # v6.1
+        with:
+          packages: ruby gcc-core make autoconf libtool libssl-devel libyaml-devel libffi-devel zlib-devel rubygems
+          site: |
+            https://cygwin.osuosl.org/
+
+      - name: configure
+        run: |
+          ./autogen.sh
+          ./configure --disable-install-doc
+        shell: C:\cygwin\bin\bash.EXE --noprofile --norc -e -o igncr -o pipefail {0}
+
+      - name: Extract bundled gems
+        run: |
+          make ruby -j5
+          make extract-gems
+        shell: C:\cygwin\bin\bash.EXE --noprofile --norc -e -o igncr -o pipefail {0}
+
+      - name: make all
+        timeout-minutes: 30
+        run: make -j4 V=1
+        shell: C:\cygwin\bin\bash.EXE --noprofile --norc -e -o igncr -o pipefail {0}
+
+      - uses: ./.github/actions/slack
+        with:
+          label: Cygwin
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
diff --git a/.github/workflows/default_gems_list.yml b/.github/workflows/default_gems_list.yml
new file mode 100644
index 0000000000..f52b83103c
--- /dev/null
+++ b/.github/workflows/default_gems_list.yml
@@ -0,0 +1,99 @@
+name: Update default gems list
+on: [push, pull_request, merge_group]
+
+env:
+  UPDATE_NEWS_ENABLED: true
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  update_default_gems_list:
+    name: Update default gems list
+
+    permissions:
+      contents: write # for Git to git push
+
+    runs-on: ubuntu-latest
+
+    if: ${{ github.repository == 'ruby/ruby' }}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2 # zizmor: ignore[artipacked]
+        with:
+          token: ${{ (github.repository == 'ruby/ruby' && !startsWith(github.event_name, 'pull')) && secrets.MATZBOT_AUTO_UPDATE_TOKEN || secrets.GITHUB_TOKEN }}
+
+      - id: gems
+        run: true
+        if: ${{ github.ref == 'refs/heads/master' }}
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          makeup: true
+          # Skip overwriting MATZBOT_AUTO_UPDATE_TOKEN
+          checkout: '' # false (ref: https://github.com/actions/runner/issues/2238)
+        if: ${{ steps.gems.outcome == 'success' }}
+
+      - name: Download previous gems list
+        run: |
+          data=default_gems.json
+          mkdir -p .downloaded-cache
+          ln -s .downloaded-cache/$data .
+          curl --retry 5 --retry-connrefused --retry-delay 2 --retry-max-time 60 -O -R -z ./$data https://stdgems.org/$data
+        if: ${{ steps.gems.outcome == 'success' }}
+
+      - name: Make default gems list
+        run: |
+          #!ruby
+          require 'rubygems'
+          $:.unshift "lib"
+          rgver = File.foreach("lib/rubygems.rb") do |line|
+            break $1 if /^\s*VERSION\s*=\s*"([^"]+)"/ =~ line
+          end
+          gems = Dir.glob("{ext,lib}/**/*.gemspec").map do |f|
+            spec = Gem::Specification.load(f)
+            "#{spec.name} #{spec.version}"
+          end.sort
+          File.open("gems/default_gems", "w") do |f|
+            f.puts "RubyGems #{rgver}"
+            f.puts gems
+          end
+        shell: ruby --disable=gems {0}
+        if: ${{ steps.gems.outcome == 'success' }}
+
+      - name: Maintain updated gems list in NEWS
+        run: |
+          ruby tool/update-NEWS-gemlist.rb default
+        if: ${{ steps.gems.outcome == 'success' && env.UPDATE_NEWS_ENABLED == 'true' }}
+
+      - name: Check diffs
+        id: diff
+        run: |
+          git diff --color --no-ext-diff --ignore-submodules --exit-code NEWS.md ||
+          echo update=true >> $GITHUB_OUTPUT
+        if: ${{ steps.gems.outcome == 'success' }}
+
+      - name: Commit
+        run: |
+          git pull --ff-only origin ${GITHUB_REF#refs/heads/}
+          git commit --message="Update default gems list at ${GITHUB_SHA:0:30} [ci skip]" NEWS.md
+          git push origin ${GITHUB_REF#refs/heads/}
+        env:
+          EMAIL: svn-admin@ruby-lang.org
+          GIT_AUTHOR_NAME: git
+          GIT_COMMITTER_NAME: git
+        if: >-
+          ${{
+          github.repository == 'ruby/ruby' &&
+          !startsWith(github.event_name, 'pull') &&
+          steps.diff.outputs.update
+          }}
+
+      - uses: ./.github/actions/slack
+        with:
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
diff --git a/.github/workflows/dependabot_automerge.yml b/.github/workflows/dependabot_automerge.yml
new file mode 100644
index 0000000000..2e4dc8d7a2
--- /dev/null
+++ b/.github/workflows/dependabot_automerge.yml
@@ -0,0 +1,32 @@
+# from https://github.com/gofiber/swagger/blob/main/.github/workflows/dependabot_automerge.yml
+name: Dependabot auto-merge
+on:
+  pull_request:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    if: github.event.pull_request.user.login == 'dependabot[bot]' && github.repository == 'ruby/ruby'
+    steps:
+      - name: Dependabot metadata
+        uses: dependabot/fetch-metadata@25dd0e34f4fe68f24cc83900b1fe3fe149efef98 # v3.1.0
+        id: metadata
+
+      - name: Wait for status checks
+        uses: lewagon/wait-on-check-action@9312864dfbc9fd208e9c0417843430751c042800 # v1.7.0
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          check-regexp: 'make \(check, .*\)'
+          wait-interval: 30
+
+      - name: Auto-merge for Dependabot PRs
+        if: ${{ steps.metadata.outputs.update-type == 'version-update:semver-minor' || steps.metadata.outputs.update-type == 'version-update:semver-patch' }}
+        run: gh pr merge --auto --rebase "$PR_URL"
+        env:
+          PR_URL: ${{ github.event.pull_request.html_url }}
+          GITHUB_TOKEN: ${{ secrets.MATZBOT_DEPENDABOT_MERGE_TOKEN }}
diff --git a/.github/workflows/labeler.yml b/.github/workflows/labeler.yml
new file mode 100644
index 0000000000..d0a8024b05
--- /dev/null
+++ b/.github/workflows/labeler.yml
@@ -0,0 +1,15 @@
+name: "Pull Request Labeler"
+on:
+- pull_request_target
+
+permissions:
+  contents: read
+
+jobs:
+  labeler:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/labeler@f27b608878404679385c85cfa523b85ccb86e213 # v6.1.0
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
new file mode 100644
index 0000000000..501d35698b
--- /dev/null
+++ b/.github/workflows/macos.yml
@@ -0,0 +1,191 @@
+name: macOS
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    # Do not use paths-ignore for required status checks
+    # https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/troubleshooting-required-status-checks#handling-skipped-but-required-checks
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  make:
+    strategy:
+      matrix:
+        include:
+          - test_task: check
+            os: macos-26
+          - test_task: check
+            os: macos-15
+            configure_args: '--with-gcc=gcc-14'
+          - test_task: check
+            os: macos-26
+            configure_args: '--with-jemalloc --with-opt-dir=$(brew --prefix jemalloc)'
+          - test_task: check
+            os: macos-26
+            configure_args: '--with-gmp'
+          - test_task: test-all
+            test_opts: --repeat-count=2
+            os: macos-26
+          - test_task: test-bundler-parallel
+            os: macos-26
+          - test_task: test-bundled-gems
+            os: macos-26
+          - test_task: check
+            os: macos-15
+          - test_task: check
+            os: macos-15-intel
+          - test_task: check
+            os: macos-14
+      fail-fast: false
+
+    env:
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+
+    runs-on: ${{ matrix.os }}
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout-cone-mode: false
+          sparse-checkout: /.github
+          persist-credentials: false
+
+      - name: Install libraries
+        uses: ./.github/actions/setup/macos
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+          clean: true
+          dummy-files: ${{ matrix.test_task == 'check' }}
+          # Set fetch-depth: 0 so that Launchable can receive commits information.
+          fetch-depth: 10
+
+      - name: make sure that kern.coredump=1
+        run: |
+          sysctl -n kern.coredump
+          sudo sysctl -w kern.coredump=1
+          sudo chmod -R +rwx /cores/
+
+      - name: Delete unused SDKs
+        # To free up disk space to not run out during the run
+        run: |
+          sudo rm -rf ~/.dotnet
+          sudo rm -rf /Library/Android
+          sudo rm -rf /Library/Developer/CoreSimulator
+        continue-on-error: true
+
+      - name: Run configure
+        run: ../src/configure -C --disable-install-doc ${ruby_configure_args} ${{ matrix.configure_args }}
+
+      - run: make prepare-gems
+        if: ${{ matrix.test_task == 'test-bundled-gems' }}
+
+      - run: make
+
+      - run: make hello
+
+      - name: runirb
+        run: |
+          echo IRB::VERSION | make runirb RUNOPT="-- -f"
+
+      - name: Set test options for skipped tests
+        run: |
+          set -x
+          TESTS="$(echo "${{ matrix.skipped_tests }}" | sed 's| |$$/ -n!/|g;s|^|-n!/|;s|$|$$/|')"
+          echo "TESTS=${TESTS}" >> $GITHUB_ENV
+        if: ${{ matrix.test_task == 'check' && matrix.skipped_tests }}
+
+      - name: Set up Launchable
+        id: launchable
+        uses: ./.github/actions/launchable/setup
+        with:
+          os: ${{ matrix.os }}
+          test-opts: ${{ matrix.test_opts }}
+          launchable-token: ${{ secrets.LAUNCHABLE_TOKEN }}
+          builddir: build
+          srcdir: src
+        continue-on-error: true
+        timeout-minutes: 3
+
+      - name: Set extra test options
+        run: |
+          echo "TESTS=$TESTS ${{ matrix.test_opts }}" >> $GITHUB_ENV
+          echo "RUBY_TEST_TIMEOUT_SCALE=10" >> $GITHUB_ENV # With --repeat-count=2, flaky test by timeout occurs frequently for some reason
+        if: matrix.test_opts
+
+      - name: make ${{ matrix.test_task }}
+        run: |
+          test -n "${LAUNCHABLE_STDOUT}" && exec 1> >(tee "${LAUNCHABLE_STDOUT}")
+          test -n "${LAUNCHABLE_STDERR}" && exec 2> >(tee "${LAUNCHABLE_STDERR}")
+
+          ulimit -c unlimited
+          make -s ${{ matrix.test_task }} ${TESTS:+TESTS="$TESTS"}
+        timeout-minutes: 90
+        env:
+          RUBY_TESTOPTS: '-q --tty=no'
+          TEST_BUNDLED_GEMS_ALLOW_FAILURES: ''
+          PRECHECK_BUNDLED_GEMS: 'no'
+          LAUNCHABLE_STDOUT: ${{ steps.launchable.outputs.stdout_report_path }}
+          LAUNCHABLE_STDERR: ${{ steps.launchable.outputs.stderr_report_path }}
+
+      - name: make skipped tests
+        run: |
+          make -s test-all TESTS="${TESTS//-n!\//-n/}"
+        env:
+          GNUMAKEFLAGS: ''
+          RUBY_TESTOPTS: '-v --tty=no'
+          PRECHECK_BUNDLED_GEMS: 'no'
+        if: ${{ matrix.test_task == 'check' && matrix.skipped_tests }}
+        continue-on-error: ${{ matrix.continue-on-skipped_tests || false }}
+
+      - name: CAPI extensions
+        uses: ./.github/actions/capiext
+        with:
+          builddir: build
+        env:
+          RUBY_TESTOPTS: '-v --tty=no'
+        if: ${{ contains(matrix.extra_checks, 'capi') }}
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ${{ matrix.os }} / ${{ matrix.test_task }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+  result:
+    if: ${{ always() }}
+    name: ${{ github.workflow }} result
+    runs-on: ubuntu-latest
+    needs: [make]
+    steps:
+      - run: exit 1
+        working-directory:
+        if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
+
+defaults:
+  run:
+    working-directory: build
diff --git a/.github/workflows/mingw.yml b/.github/workflows/mingw.yml
new file mode 100644
index 0000000000..1efae8be59
--- /dev/null
+++ b/.github/workflows/mingw.yml
@@ -0,0 +1,246 @@
+name: MinGW
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+# Notes:
+# Actions console encoding causes issues, see test-all & test-spec steps
+#
+jobs:
+  make:
+    runs-on: windows-${{ matrix.os }}
+
+    name: ${{ github.workflow }} (${{ matrix.msystem }})
+
+    env:
+      MSYSTEM: ${{ matrix.msystem }}
+      MSYS2_ARCH: >-
+        ${{ case(
+        contains(matrix.msystem, 'arm64'), 'aarch64',
+        contains(matrix.msystem, '64'), 'x86_64',
+        'i686'
+        ) }}
+      MINGW_PACKAGE_PREFIX: >-
+        mingw-w${{
+        case(endsWith(matrix.msystem, '64'), '64', '32')
+        }}-${{ case(
+        startsWith(matrix.msystem, 'clang'), 'clang',
+        startsWith(matrix.msystem, 'ucrt'), 'ucrt',
+        'mingw'
+        ) }}-${{ case(
+        contains(matrix.msystem, 'arm64'), 'aarch64',
+        endsWith(matrix.msystem, '64'), 'x86_64',
+        'i686'
+        ) }}
+      CFLAGS: '-mtune=generic -O3 -pipe'
+      CXXFLAGS: '-mtune=generic -O3 -pipe'
+      CPPFLAGS: '-D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048'
+      LDFLAGS: '-pipe'
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+
+    strategy:
+      matrix:
+        include:
+          # To mitigate flakiness of MinGW CI, we test only one runtime that newer MSYS2 uses.
+          # Ruby 3.2 is the first Windows Ruby to use OpenSSL 3.x
+          - msystem: 'UCRT64'
+            os: 2022
+            test_task: 'check'
+            test-all-opts: '--name=!/TestObjSpace#test_reachable_objects_during_iteration/'
+          - msystem: 'CLANGARM64'
+            os: 11-arm
+            test_task: 'check'
+      fail-fast: false
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]' && !startsWith(github.head_ref, 'dependabot/vcpkg'))
+      )}}
+
+    steps:
+      - uses: msys2/setup-msys2@e9898307ac31d1a803454791be09ab9973336e1c # v2.31.1
+        id: msys2
+        with:
+          msystem: ${{ matrix.msystem }}
+          update: true
+          install: >-
+            git
+            make
+            ruby
+            autoconf
+            ${{ env.MINGW_PACKAGE_PREFIX }}-gcc
+            ${{ env.MINGW_PACKAGE_PREFIX }}-ragel
+            ${{ env.MINGW_PACKAGE_PREFIX }}-openssl
+            ${{ env.MINGW_PACKAGE_PREFIX }}-libyaml
+            ${{ env.MINGW_PACKAGE_PREFIX }}-libffi
+
+      - name: Set up env
+        id: setup-env
+        working-directory:
+        run: |
+          $msys2 = ${env:MSYS2_LOCATION}
+          $msystem = ${env:MSYSTEM}.ToLower()
+          echo $msys2\usr\bin $msys2\$msystem\bin |
+            Tee-Object ${env:GITHUB_PATH} -Append -Encoding utf-8
+
+          # Use the fast device for the temporary directory.
+          # %TEMP% is inconsistent with %TMP% and test-all expects they are consistent.
+          # https://github.com/actions/virtual-environments/issues/712#issuecomment-613004302
+          $tmp = ${env:RUNNER_TEMP}
+          echo HOME=$home TMP=$tmp TEMP=$tmp TMPDIR=$tmp |
+            Tee-Object ${env:GITHUB_ENV} -Append -Encoding utf-8
+        shell: pwsh             # cmd.exe does not strip spaces before `|`.
+        env:
+          MSYS2_LOCATION: ${{ steps.msys2.outputs.msys2-location }}
+          MSYSTEM: ${{ matrix.msystem }}
+
+      - name: Remove Strawberry Perl pkg-config
+        working-directory:
+        # `pkg-config.bat` included in Strawberry Perl is written in
+        # Perl and doesn't work when another msys2 `perl` precede its
+        # own `perl`.
+        #
+        # ```
+        # Can't find C:\Strawberry\perl\bin\pkg-config.bat on PATH, '.' not in PATH.
+        # ```
+        run: |
+          Get-Command pkg-config.bat | % { ren $_.path ($_.path + "~") }
+        shell: pwsh
+
+      - name: Misc system & package info
+        working-directory:
+        run: |
+          group() { echo ::group::$'\e[94;1m'"$*"$'\e[m'; }
+          endgroup() { echo ::endgroup::; }
+
+          group Path
+          cygpath -wa / . $(type -p cygpath bash sh)
+          endgroup
+
+          I() {
+              group $1
+              run Where type -pa $1 && { [ $# -eq 1 ] || run Version "$@"; } ||
+                  failed+=($1)
+              endgroup
+          }
+          run() { local w m=$1; shift; w="$("$@")" && show "$m" && indent "$w"; }
+          indent() { [ -z "$1" ] || echo "$1" | /bin/sed '/^$/!s/^/  /'; }
+          show() { echo $'\e[96m'"$*"$'\e[m'; }
+
+          failed=()
+
+          I gcc.exe --version
+          I ragel.exe --version
+          I make.exe --version
+          I openssl.exe version
+          I libcrypto-3-x64.dll
+          I libssl-3-x64.dll
+
+          group Packages
+          pacman -Qs $MINGW_PACKAGE_PREFIX-* | /bin/sed -n "s,local/$MINGW_PACKAGE_PREFIX-,,p"
+          endgroup
+
+          [ ${#failed[@]} -eq 0 ]
+        shell: sh
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout-cone-mode: false
+          sparse-checkout: /.github
+          persist-credentials: false
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+          # Set fetch-depth: 10 so that Launchable can receive commits information.
+          fetch-depth: 10
+
+      - name: configure
+        run: >
+          ../src/configure --disable-install-doc --prefix=/.
+          --build=$CHOST --host=$CHOST --target=$CHOST
+        shell: sh
+        env:
+          CHOST: ${{ env.MSYS2_ARCH }}-w64-mingw32
+
+      - name: make all
+        timeout-minutes: 30
+        run: make -j4
+
+      - name: make install
+        run: make DESTDIR=../install install-nodoc
+
+      - name: Set up Launchable
+        uses: ./.github/actions/launchable/setup
+        with:
+          os: windows-2022
+          launchable-token: ${{ secrets.LAUNCHABLE_TOKEN }}
+          builddir: build
+          srcdir: src
+          test-tasks: '["test", "test-all", "test-spec"]'
+        continue-on-error: true
+        timeout-minutes: 3
+
+      - name: test
+        timeout-minutes: 30
+        run: make test test-tool
+        env:
+          GNUMAKEFLAGS: ''
+          RUBY_TESTOPTS: '-v --tty=no'
+        if: ${{ matrix.test_task == 'check' || matrix.test_task == 'test' }}
+
+      - name: test-all
+        timeout-minutes: 45
+        run: |
+          make ${{ StartsWith(matrix.test_task, 'test/') && matrix.test_task || 'test-all' }}
+        env:
+          RUBY_TESTOPTS: >-
+            --retry --job-status=normal --show-skip --timeout-scale=1.5 -j4
+            ${{ matrix.test-all-opts }}
+            ${{ env.TESTS }}
+          BUNDLER_VERSION:
+        if: ${{ matrix.test_task == 'check' || matrix.test_task == 'test-all' || StartsWith(matrix.test_task, 'test/') }}
+
+      - name: test-spec
+        timeout-minutes: 10
+        run: |
+          make ${{ StartsWith(matrix.test_task, 'spec/') && matrix.test_task || 'test-spec' }}
+        if: ${{ matrix.test_task == 'check' || matrix.test_task == 'test-spec' || StartsWith(matrix.test_task, 'spec/') }}
+
+      - uses: ./src/.github/actions/slack
+        with:
+          label: ${{ matrix.msystem }} / ${{ matrix.test_task }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+defaults:
+  run:
+    working-directory: build
+    shell: cmd
diff --git a/.github/workflows/modgc.yml b/.github/workflows/modgc.yml
new file mode 100644
index 0000000000..bd3c6ab575
--- /dev/null
+++ b/.github/workflows/modgc.yml
@@ -0,0 +1,179 @@
+name: ModGC
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    # Do not use paths-ignore for required status checks
+    # https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/troubleshooting-required-status-checks#handling-skipped-but-required-checks
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  check:
+    strategy:
+      matrix:
+        gc:
+          - name: default
+          - name: mmtk
+            mmtk_build: release
+        os: [macos-26, ubuntu-latest]
+        include:
+          - test_task: check
+      fail-fast: false
+
+    env:
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+      RUBY_DEBUG: ci
+
+    runs-on: ${{ matrix.os }}
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout-cone-mode: false
+          sparse-checkout: /.github
+          persist-credentials: false
+
+      - name: Install libraries (macOS)
+        uses: ./.github/actions/setup/macos
+        if: ${{ contains(matrix.os, 'macos') }}
+
+      - name: Install libraries (Ubuntu)
+        uses: ./.github/actions/setup/ubuntu
+        if: ${{ contains(matrix.os, 'ubuntu') }}
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: '3.1'
+          bundler: none
+        if: ${{ contains(matrix.os, 'ubuntu') }}
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+          clean: true
+          dummy-files: false
+          # Set fetch-depth: 10 so that Launchable can receive commits information.
+          fetch-depth: 10
+
+      - name: make sure that kern.coredump=1
+        run: |
+          sysctl -n kern.coredump
+          sudo sysctl -w kern.coredump=1
+          sudo chmod -R +rwx /cores/
+        if: ${{ contains(matrix.os, 'macos') }}
+
+      - name: Delete unused SDKs
+        # To free up disk space to not run out during the run
+        run: |
+          sudo rm -rf ~/.dotnet
+          sudo rm -rf /Library/Android
+          sudo rm -rf /Library/Developer/CoreSimulator
+        continue-on-error: true
+        if: ${{ contains(matrix.os, 'macos') }}
+
+      - name: Setup Ruby GC Directory
+        run: |
+          echo "MODULAR_GC_DIR=$HOME/ruby_gc" >> $GITHUB_ENV
+
+      - name: Run configure
+        env:
+          arch: ${{ matrix.arch }}
+        run: |
+          ${SETARCH} ../src/configure -C --disable-install-doc --with-modular-gc="${MODULAR_GC_DIR}" \
+          ${arch:+--target=$arch-$OSTYPE --host=$arch-$OSTYPE}
+
+      - uses: actions-rust-lang/setup-rust-toolchain@46268bd060767258de96ed93c1251119784f2ab6 # v1.16.1
+        with:
+          cache-bin: false
+      - name: Set MMTk environment variables
+        run: |
+          echo 'EXCLUDES=../src/test/.excludes-mmtk' >> $GITHUB_ENV
+          echo 'MSPECOPT=-B../src/spec/mmtk.mspec' >> $GITHUB_ENV
+        if: ${{ matrix.gc.name == 'mmtk' }}
+
+      - run: ${SETARCH} make
+
+      - name: Build Modular  GC
+        run: |
+          echo "RUBY_GC_LIBRARY=${{ matrix.gc.name }}" >> $GITHUB_ENV
+          make install-modular-gc MODULAR_GC=${{ matrix.gc.name }} MMTK_BUILD=${{ matrix.gc.mmtk_build }}
+          make distclean-modular-gc MODULAR_GC=${{ matrix.gc.name }}
+
+      - run: ${SETARCH} make hello
+
+      - name: Set test options for skipped tests
+        run: |
+          set -x
+          TESTS="$(echo "${{ matrix.skipped_tests }}" | sed 's| |$$/ -n!/|g;s|^|-n!/|;s|$|$$/|')"
+          echo "TESTS=${TESTS}" >> $GITHUB_ENV
+        if: ${{ matrix.test_task == 'check' && matrix.skipped_tests }}
+
+      - name: Set up Launchable
+        id: launchable
+        uses: ./.github/actions/launchable/setup
+        with:
+          os: ${{ matrix.os || 'ubuntu-22.04' }}
+          test-opts: ${{ matrix.configure }}
+          launchable-token: ${{ secrets.LAUNCHABLE_TOKEN }}
+          builddir: build
+          srcdir: src
+        continue-on-error: true
+        timeout-minutes: 3
+
+      - name: make ${{ matrix.test_task }}
+        run: |
+          test -n "${LAUNCHABLE_STDOUT}" && exec 1> >(tee "${LAUNCHABLE_STDOUT}")
+          test -n "${LAUNCHABLE_STDERR}" && exec 2> >(tee "${LAUNCHABLE_STDERR}")
+
+          ${SETARCH} make -s ${{ matrix.test_task }} \
+            ${TESTS:+TESTS="$TESTS"} \
+            ${{ !contains(matrix.test_task, 'bundle') && 'RUBYOPT=-w' || '' }}
+        timeout-minutes: ${{ matrix.gc.timeout || 40 }}
+        env:
+          RUBY_TESTOPTS: '-q --tty=no'
+          TEST_BUNDLED_GEMS_ALLOW_FAILURES: ''
+          PRECHECK_BUNDLED_GEMS: 'no'
+          LAUNCHABLE_STDOUT: ${{ steps.launchable.outputs.stdout_report_path }}
+          LAUNCHABLE_STDERR: ${{ steps.launchable.outputs.stderr_report_path }}
+
+      - name: make skipped tests
+        run: |
+          ${SETARCH} make -s test-all TESTS="${TESTS//-n!\//-n/}"
+        env:
+          GNUMAKEFLAGS: ''
+          RUBY_TESTOPTS: '-v --tty=no'
+        if: ${{ matrix.test_task == 'check' && matrix.skipped_tests }}
+        continue-on-error: ${{ matrix.continue-on-skipped_tests || false }}
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ${{ matrix.test_task }} ${{ matrix.configure }}${{ matrix.arch }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+defaults:
+  run:
+    working-directory: build
diff --git a/.github/workflows/parse_y.yml b/.github/workflows/parse_y.yml
new file mode 100644
index 0000000000..a0082f71de
--- /dev/null
+++ b/.github/workflows/parse_y.yml
@@ -0,0 +1,101 @@
+name: parse.y
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  make:
+    strategy:
+      matrix:
+        include:
+          - test_task: check
+          - test_task: test-bundler-parallel
+          - test_task: test-bundled-gems
+      fail-fast: false
+
+    env:
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+      RUBY_DEBUG: ci
+      SETARCH: ${{ matrix.arch && format('setarch {0}', matrix.arch) }}
+
+    runs-on: ubuntu-22.04
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout-cone-mode: false
+          sparse-checkout: /.github
+          persist-credentials: false
+
+      - uses: ./.github/actions/setup/ubuntu
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: '3.1'
+          bundler: none
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+          clean: true
+          dummy-files: ${{ matrix.test_task == 'check' }}
+
+      - name: Run configure
+        run: ../src/configure -C --disable-install-doc cppflags=-DRUBY_DEBUG --with-parser=parse.y
+
+      - run: make
+
+      - run: make TESTRUN_SCRIPT='-renvutil -v -e "exit EnvUtil.current_parser == %[parse.y]"' run
+        env:
+          RUNOPT0: -I$(tooldir)/lib
+
+      - name: make ${{ matrix.test_task }}
+        run: make -s ${{ matrix.test_task }} RUN_OPTS="$RUN_OPTS" SPECOPTS="$SPECOPTS"
+        env:
+          RUBY_TESTOPTS: ${{ matrix.testopts }}
+          EXCLUDES: '../src/test/.excludes-parsey'
+          RUN_OPTS: ${{ matrix.run_opts || '--parser=parse.y' }}
+          SPECOPTS: ${{ matrix.specopts || '-T --parser=parse.y' }}
+          TEST_BUNDLED_GEMS_ALLOW_FAILURES: ''
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ${{ matrix.run_opts }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+defaults:
+  run:
+    working-directory: build
diff --git a/.github/workflows/post_push.yml b/.github/workflows/post_push.yml
new file mode 100644
index 0000000000..237679ebb1
--- /dev/null
+++ b/.github/workflows/post_push.yml
@@ -0,0 +1,97 @@
+name: Post-push
+on:
+  push:
+    branches:
+      - master
+      - 'ruby_*_*'
+
+permissions:
+  contents: read
+
+jobs:
+  hooks:
+    name: Post-push hooks
+    runs-on: ubuntu-latest
+    if: ${{ github.repository == 'ruby/ruby' }}
+    steps:
+      - name: Sync git.ruby-lang.org
+        id: sync-git
+        continue-on-error: true
+        run: |
+          mkdir -p ~/.ssh
+          (umask 066; printenv RUBY_GIT_SYNC_PRIVATE_KEY > ~/.ssh/id_ed25519)
+          ssh-keyscan -t ed25519 git.ruby-lang.org >> ~/.ssh/known_hosts
+          ssh -i ~/.ssh/id_ed25519 git-sync@git.ruby-lang.org "sudo -u git /home/git/git.ruby-lang.org/bin/update-ruby.sh $GITHUB_REF"
+        env:
+          GITHUB_REF: ${{ github.ref }}
+          RUBY_GIT_SYNC_PRIVATE_KEY: ${{ secrets.RUBY_GIT_SYNC_PRIVATE_KEY }}
+        if: ${{ github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/heads/ruby_') }}
+
+      - name: Fetch changesets on bugs.ruby-lang.org
+        run: |
+          curl "https://bugs.ruby-lang.org/sys/fetch_changesets?key=${REDMINE_SYS_API_KEY}" -s --fail-with-body -w '* status: %{http_code}\n'
+        env:
+          REDMINE_SYS_API_KEY: ${{ secrets.REDMINE_SYS_API_KEY }}
+        if: ${{ github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/heads/ruby_') }}
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2 # zizmor: ignore[artipacked]
+        with:
+          fetch-depth: 500 # for notify-slack-commits
+          token: ${{ secrets.MATZBOT_AUTO_UPDATE_TOKEN }}
+
+      - name: Notify commit to Slack
+        run: ruby tool/notify-slack-commits.rb "$GITHUB_OLD_SHA" "$GITHUB_NEW_SHA" refs/heads/master
+        env:
+          GITHUB_OLD_SHA: ${{ github.event.before }}
+          GITHUB_NEW_SHA: ${{ github.event.after }}
+          SLACK_WEBHOOK_URL_ALERTS: ${{ secrets.SLACK_WEBHOOK_URL_ALERTS }}
+          SLACK_WEBHOOK_URL_COMMITS: ${{ secrets.SLACK_WEBHOOK_URL_COMMITS }}
+          SLACK_WEBHOOK_URL_RUBY_JP: ${{ secrets.SLACK_WEBHOOK_URL_RUBY_JP }}
+        if: ${{ github.ref == 'refs/heads/master' }}
+
+      - name: Notify commit to ruby-cvs
+        run: |
+          SENDMAIL="ssh -i ${HOME}/.ssh/id_ed25519 git-sync@git.ruby-lang.org /usr/sbin/sendmail" \
+            ruby tool/commit-email.rb . ruby-cvs@g.ruby-lang.org \
+            "$GITHUB_OLD_SHA" "$GITHUB_NEW_SHA" "$GITHUB_REF" \
+            --viewer-uri "https://github.com/ruby/ruby/commit/" \
+            --error-to cvs-admin@ruby-lang.org
+        env:
+          GITHUB_OLD_SHA: ${{ github.event.before }}
+          GITHUB_NEW_SHA: ${{ github.event.after }}
+          GITHUB_REF: ${{ github.ref }}
+        if: ${{ github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/heads/ruby_') }}
+
+      - name: Auto-correct code styles
+        run: |
+          set -x
+          ruby tool/auto-style.rb "$GITHUB_OLD_SHA" "$GITHUB_NEW_SHA" refs/heads/master
+        env:
+          GITHUB_OLD_SHA: ${{ github.event.before }}
+          GITHUB_NEW_SHA: ${{ github.event.after }}
+          GIT_AUTHOR_NAME: git
+          GIT_COMMITTER_NAME: git
+          EMAIL: svn-admin@ruby-lang.org
+        if: ${{ github.ref == 'refs/heads/master' }}
+
+      - name: Push PR notes to GitHub
+        id: pr-notes
+        continue-on-error: true
+        run: ruby tool/notes-github-pr.rb "$(pwd)/.git" "$GITHUB_OLD_SHA" "$GITHUB_NEW_SHA" refs/heads/master
+        env:
+          GITHUB_OLD_SHA: ${{ github.event.before }}
+          GITHUB_NEW_SHA: ${{ github.event.after }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GIT_AUTHOR_NAME: git
+          GIT_COMMITTER_NAME: git
+          EMAIL: svn-admin@ruby-lang.org
+        if: ${{ github.ref == 'refs/heads/master' }}
+
+      - name: Check for failures
+        run: exit 1
+        if: ${{ steps.sync-git.outcome == 'failure' || steps.pr-notes.outcome == 'failure' }}
+
+      - uses: ./.github/actions/slack
+        with:
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
diff --git a/.github/workflows/pr-playground.yml b/.github/workflows/pr-playground.yml
new file mode 100644
index 0000000000..dc4f075a38
--- /dev/null
+++ b/.github/workflows/pr-playground.yml
@@ -0,0 +1,131 @@
+name: Post Playground link to PR
+on:
+  pull_request_target:
+    types: [labeled]
+  workflow_run:
+    workflows: ["WebAssembly"]
+    types: [completed]
+
+permissions:
+  contents: read
+  actions: read
+
+jobs:
+  post-summary:
+    name: Post Playground link
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    # Post a comment only if the PR status check is passed and the PR is labeled with `Playground`.
+    # Triggered twice: when the PR is labeled and when PR build is passed.
+    if: >-
+      ${{ false
+      || (true
+        && github.event_name == 'pull_request_target'
+        && contains(github.event.pull_request.labels.*.name, 'Playground'))
+      || (true
+        && github.event_name == 'workflow_run'
+        && github.event.workflow_run.conclusion == 'success'
+        && github.event.workflow_run.event == 'pull_request')
+      }}
+    steps:
+      - uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const fs = require('fs/promises');
+
+            const buildWorkflowPath = '.github/workflows/wasm.yml';
+            const findSuccessfuBuildRun = async (pr) => {
+              const opts = github.rest.actions.listWorkflowRunsForRepo.endpoint.merge({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                status: 'success',
+                branch: pr.head.ref,
+              });
+              const runs = await github.paginate(opts);
+              const buildRun = runs.find(run => run.path == buildWorkflowPath);
+              return buildRun;
+            }
+
+            const postComment = async (body, pr) => {
+              const { data: comments } = await github.rest.issues.listComments({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: pr.number,
+              });
+
+              const commentOpts = { owner: context.repo.owner, repo: context.repo.repo, body: comment };
+
+              const existingComment = comments.find(comment => comment.body.startsWith(magicComment));
+              if (existingComment) {
+                core.info(`Updating existing comment: ${existingComment.html_url}`);
+                await github.rest.issues.updateComment({
+                  ...commentOpts, comment_id: existingComment.id
+                });
+              } else {
+                await github.rest.issues.createComment({
+                  ...commentOpts, issue_number: pr.number
+                });
+              }
+            }
+
+            const derivePRNumber = async () => {
+              if (context.payload.pull_request) {
+                return context.payload.pull_request.number;
+              }
+              // Workaround for https://github.com/orgs/community/discussions/25220
+
+              const { data: { artifacts } } = await github.rest.actions.listWorkflowRunArtifacts({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                run_id: context.payload.workflow_run.id,
+              });
+              const artifact = artifacts.find(artifact => artifact.name == 'github-pr-info');
+              if (!artifact) {
+                throw new Error('Cannot find github-pr-info.txt artifact');
+              }
+
+              const { data } = await github.rest.actions.downloadArtifact({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                artifact_id: artifact.id,
+                archive_format: 'zip',
+              });
+
+              await fs.writeFile('pr-info.zip', Buffer.from(data));
+              await exec.exec('unzip', ['pr-info.zip']);
+              return await fs.readFile('github-pr-info.txt', 'utf8');
+            }
+
+            const prNumber = await derivePRNumber();
+
+            const { data: pr } = await github.rest.pulls.get({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: prNumber,
+            });
+
+            core.info(`Checking if the PR ${prNumber} is labeled with Playground...`);
+            if (!pr.labels.some(label => label.name == 'Playground')) {
+              core.info(`The PR is not labeled with Playground.`);
+              return;
+            }
+
+            core.info(`Checking if the build is successful for ${pr.head.ref} in ${pr.head.repo.owner.login}/${pr.head.repo.name}...`);
+            const buildRun = await findSuccessfuBuildRun(pr);
+            if (!buildRun) {
+              core.info(`No successful build run found for ${buildWorkflowPath} on ${pr.head.ref} yet.`);
+              return;
+            }
+            core.info(`Found a successful build run: ${buildRun.html_url}`);
+
+            const runLink = `${process.env.GITHUB_SERVER_URL}/${process.env.GITHUB_REPOSITORY}/actions/runs/${process.env.GITHUB_RUN_ID}`;
+            const magicComment = `<!-- AUTO-GENERATED-COMMENT-PR-PLAYGROUND -->`;
+            const comment = `${magicComment}
+            **Try on Playground**: https://ruby.github.io/play-ruby?run=${buildRun.id}
+            This is an automated comment by [\`pr-playground.yml\`](${runLink}) workflow.
+            `;
+            core.info(`Comment: ${comment}`);
+            await postComment(comment, pr);
+
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
new file mode 100644
index 0000000000..5d16915e10
--- /dev/null
+++ b/.github/workflows/publish.yml
@@ -0,0 +1,114 @@
+name: Publish Ruby packages
+
+on:
+  repository_dispatch:
+    types:
+      - release
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version of the Ruby package to release'
+        required: true
+        default: '4.0.0'
+
+permissions:
+  contents: read
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: 3.3.4
+
+      - name: Store Ruby version
+        env:
+          RUBY_VERSION: ${{ github.event.client_payload.version || github.event.inputs.version }}
+        run: |
+          echo "RUBY_VERSION=${RUBY_VERSION}" >> $GITHUB_ENV
+
+      - name: Store ABI version
+        run: echo "ABI_VERSION=$(echo ${RUBY_VERSION} | cut -d '.' -f 1-2)" >> $GITHUB_ENV
+
+      - name: Copy draft package `/tmp` to `/pub` directory
+        run: tool/release.sh ${RUBY_VERSION}
+        env:
+          AWS_ACCESS_KEY_ID: ${{ secrets.FTP_R_L_O_AWS_ACCESS_KEY_ID }}
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.FTP_R_L_O_AWS_SECRET_ACCESS_KEY }}
+          AWS_DEFAULT_REGION: us-west-2
+
+      - name: Purge URLs of release package
+        run: |
+          curl -X POST \
+            -H "Fastly-Key: ${{ secrets.FASTLY_PURGE_TOKEN }}" \
+            https://api.fastly.com/purge/cache.ruby-lang.org/pub/ruby/${ABI_VERSION}/ruby-${RUBY_VERSION}.tar.gz
+          curl -X POST \
+            -H "Fastly-Key: ${{ secrets.FASTLY_PURGE_TOKEN }}" \
+            https://api.fastly.com/purge/cache.ruby-lang.org/pub/ruby/${ABI_VERSION}/ruby-${RUBY_VERSION}.tar.xz
+          curl -X POST \
+            -H "Fastly-Key: ${{ secrets.FASTLY_PURGE_TOKEN }}" \
+            https://api.fastly.com/purge/cache.ruby-lang.org/pub/ruby/${ABI_VERSION}/ruby-${RUBY_VERSION}.zip
+
+      - name: Create a release on GitHub
+        run: |
+          RELEASE_TAG=$(ruby tool/ruby-version.rb tag "${RUBY_VERSION}")
+          echo $RELEASE_TAG
+          PREVIOUS_RELEASE_TAG=$(ruby tool/ruby-version.rb previous-tag "${RUBY_VERSION}")
+          echo $PREVIOUS_RELEASE_TAG
+          tool/gen-github-release.rb $PREVIOUS_RELEASE_TAG $RELEASE_TAG --no-dry-run
+        env:
+          GITHUB_TOKEN: ${{ secrets.MATZBOT_AUTO_UPDATE_TOKEN }}
+
+      - name: Update versions index
+        run: |
+          curl -L -X POST \
+            -H "Authorization: Bearer ${{ secrets.MATZBOT_GITHUB_WORKFLOW_TOKEN }}" \
+            -H "Accept: application/vnd.github+json" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/ruby/actions/dispatches \
+            -d '{"event_type": "update_index"}'
+
+      - name: Build and push Docker images
+        run: |
+          curl -L -X POST \
+            -H "Authorization: Bearer ${{ secrets.MATZBOT_GITHUB_WORKFLOW_TOKEN }}" \
+            -H "Accept: application/vnd.github+json" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/ruby/docker-images/dispatches \
+            -d "{\"event_type\": \"build\", \"client_payload\": {\"ruby_version\": \"${RUBY_VERSION}\"}}"
+
+      - name: Build snapcraft packages
+        run: |
+          curl -L -X POST \
+            -H "Authorization: Bearer ${{ secrets.MATZBOT_GITHUB_WORKFLOW_TOKEN }}" \
+            -H "Accept: application/vnd.github+json" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/ruby/snap.ruby/dispatches \
+            -d "{\"event_type\": \"build\", \"client_payload\": {\"ruby_version\": \"${RUBY_VERSION}\"}}"
+
+      - name: Store the latest LTS version of OpenSSL
+        run: |
+          echo "OPENSSL_VERSION=`curl -s https://api.github.com/repos/openssl/openssl/releases | jq -r '.[].tag_name | select(startswith("openssl-3.0"))' | sort -Vr | head -n1 | cut -d'-' -f2`" >> $GITHUB_ENV
+
+      - name: Update ruby-build definition
+        run: |
+          curl -L -X POST \
+            -H "Authorization: Bearer ${{ secrets.RUBY_BUILD_WORKFLOW_TOKEN }}" \
+            -H "Accept: application/vnd.github+json" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/rbenv/ruby-build/dispatches \
+            -d "{\"event_type\": \"update-ruby\", \"client_payload\": {\"ruby_version\": \"${RUBY_VERSION}\", \"openssl_version\": \"${OPENSSL_VERSION}\"}}"
+
+      - name: Update all-ruby definition
+        run: |
+          curl -L -X POST \
+            -H "Authorization: Bearer ${{ secrets.MATZBOT_GITHUB_WORKFLOW_TOKEN }}" \
+            -H "Accept: application/vnd.github+json" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/ruby/all-ruby/dispatches \
+            -d '{"event_type": "update"}'
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000000..a35bcff99a
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,21 @@
+name: Start release workflow
+on:
+  push:
+    tags:
+      - '*'
+
+permissions:
+  contents: read
+
+jobs:
+  notify:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Build release package
+        run: |
+          curl -L -X POST \
+            -H "Authorization: Bearer ${{ secrets.MATZBOT_GITHUB_WORKFLOW_TOKEN }}" \
+            -H "Accept: application/vnd.github+json" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/ruby/actions/dispatches \
+            -d "{\"event_type\": \"$GITHUB_REF\"}"
diff --git a/.github/workflows/rust-warnings.yml b/.github/workflows/rust-warnings.yml
new file mode 100644
index 0000000000..23ed164405
--- /dev/null
+++ b/.github/workflows/rust-warnings.yml
@@ -0,0 +1,62 @@
+# Surface Rust warnings on PRs that touch any Rust code.
+# Not a required check so we never block people over new warnings
+# that might come from a new Rust version being released.
+name: Rust warnings
+on:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopened
+    paths:
+      - '**.rs'
+      - '!**.inc.rs'
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  rust-warnings:
+    env:
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+
+    runs-on: ubuntu-24.04
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]' && !startsWith(github.head_ref, 'dependabot/cargo'))
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Install Rust
+        run: rustup default beta
+
+      - name: Rust warnings
+        shell: bash
+        run: |
+          set -eu
+          cargo check --quiet --all-features --message-format=json \
+            | jq -r 'select(.message.level | IN("warning", "error")) | .message.rendered' \
+            | tee messages.txt
+          (exit "${PIPESTATUS[0]}") && ! grep --quiet '[^[:space:]]' messages.txt
+
+      - name: "📜 `rustdoc` warnings"
+        shell: bash
+        run: |
+          set -eu
+          cargo doc --document-private-items --all --no-deps --message-format=json \
+            | jq -r 'select(.message.level | IN("warning", "error")) | .message.rendered' \
+            | tee messages.txt
+          (exit "${PIPESTATUS[0]}") && ! grep --quiet '[^[:space:]]' messages.txt
diff --git a/.github/workflows/scorecards.yml b/.github/workflows/scorecards.yml
new file mode 100644
index 0000000000..74c13f98fa
--- /dev/null
+++ b/.github/workflows/scorecards.yml
@@ -0,0 +1,78 @@
+# This workflow uses actions that are not certified by GitHub. They are provided
+# by a third-party and are governed by separate terms of service, privacy
+# policy, and support documentation.
+
+name: Scorecard supply-chain security
+on:
+  # For Branch-Protection check. Only the default branch is supported. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#branch-protection
+  branch_protection_rule:
+  # To guarantee Maintained check is occasionally updated. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#maintained
+  schedule:
+    - cron: '39 3 * * 5'
+  # push:
+  #   branches: [ "master" ]
+
+# Declare default permissions as read only.
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    # `publish_results: true` only works when run from the default branch. conditional can be removed if disabled.
+    if: github.event.repository.default_branch == github.ref_name || github.event_name == 'pull_request'
+    permissions:
+      # Needed to upload the results to code-scanning dashboard.
+      security-events: write
+      # Needed to publish results and get a badge (see publish_results below).
+      id-token: write
+      # Uncomment the permissions below if installing in a private repository.
+      # contents: read
+      # actions: read
+
+    steps:
+      - name: "Checkout code"
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: "Run analysis"
+        uses: ossf/scorecard-action@4eaacf0543bb3f2c246792bd56e8cdeffafb205a # v2.4.3
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          # (Optional) "write" PAT token. Uncomment the `repo_token` line below if:
+          # - you want to enable the Branch-Protection check on a *public* repository, or
+          # - you are installing Scorecard on a *private* repository
+          # To create the PAT, follow the steps in https://github.com/ossf/scorecard-action?tab=readme-ov-file#authentication-with-fine-grained-pat-optional.
+          # repo_token: ${{ secrets.SCORECARD_TOKEN }}
+
+          # Public repositories:
+          #   - Publish results to OpenSSF REST API for easy access by consumers
+          #   - Allows the repository to include the Scorecard badge.
+          #   - See https://github.com/ossf/scorecard-action#publishing-results.
+          # For private repositories:
+          #   - `publish_results` will always be set to `false`, regardless
+          #     of the value entered here.
+          publish_results: true
+
+          # (Optional) Uncomment file_mode if you have a .gitattributes with files marked export-ignore
+          # file_mode: git
+
+      # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
+      # format to the repository Actions tab.
+      - name: "Upload artifact"
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      # Upload the results to GitHub's code scanning dashboard (optional).
+      # Commenting out will disable upload of results to your repo's Code Scanning dashboard
+      - name: "Upload to code-scanning"
+        uses: github/codeql-action/upload-sarif@7211b7c8077ea37d8641b6271f6a365a22a5fbfa # v4.36.0
+        with:
+          sarif_file: results.sarif
diff --git a/.github/workflows/spec_guards.yml b/.github/workflows/spec_guards.yml
new file mode 100644
index 0000000000..856b6e434e
--- /dev/null
+++ b/.github/workflows/spec_guards.yml
@@ -0,0 +1,68 @@
+name: Rubyspec Version Guards Check
+
+on:
+  push:
+    paths:
+      - '.github/workflows/spec_guards.yml'
+      - 'spec/**'
+      - '!spec/*.md'
+  pull_request:
+    paths:
+      - '.github/workflows/spec_guards.yml'
+      - 'spec/**'
+      - '!spec/*.md'
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  rubyspec:
+    name: Rubyspec
+
+    runs-on: ubuntu-22.04
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    strategy:
+      matrix:
+        # Specs from ruby/spec should still run on all supported Ruby versions.
+        # This also ensures the needed ruby_version_is guards are there, see spec/README.md.
+        ruby:
+          - ruby-3.3
+          - ruby-3.4
+          - ruby-4.0
+      fail-fast: false
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler: none
+
+      - run: gem install webrick
+
+      - run: ruby ../mspec/bin/mspec
+        working-directory: spec/ruby
+        env:
+          CHECK_LEAKS: true
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ${{ matrix.ruby }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
diff --git a/.github/workflows/sync_default_gems.yml b/.github/workflows/sync_default_gems.yml
new file mode 100644
index 0000000000..9fd1945449
--- /dev/null
+++ b/.github/workflows/sync_default_gems.yml
@@ -0,0 +1,80 @@
+name: Sync default gems
+
+env:
+  DEFAULT_GEM_SYNC_ENABLED: true
+
+on:
+  workflow_dispatch:
+    inputs:
+      gem:
+        required: true
+        description: 'Name of the gem to be synchronized'
+        type: string
+      before:
+        required: true
+        description: 'Gem commit SHA before sync'
+        type: string
+      after:
+        required: true
+        description: 'Gem commit SHA after sync'
+        type: string
+
+permissions:
+  contents: read
+
+jobs:
+  sync_default_gems:
+    name: Sync default gem ${{ github.event.inputs.gem }}
+
+    permissions:
+      contents: write # for Git to git push
+
+    runs-on: ubuntu-latest
+
+    if: ${{ github.repository == 'ruby/ruby' }}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2 # zizmor: ignore[artipacked]
+        name: Check out ruby/ruby
+        with:
+          token: ${{ github.repository == 'ruby/ruby' && secrets.MATZBOT_AUTO_UPDATE_TOKEN || secrets.GITHUB_TOKEN }}
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: '3.4'
+          bundler: none
+
+      - name: Run tool/sync_default_gems.rb
+        id: sync
+        run: |
+          ruby_before=$(git rev-parse HEAD)
+          set -x
+          ruby tool/sync_default_gems.rb "${gem_name}" "${gem_before}..${gem_after}"
+          if [[ "$(git rev-parse HEAD)" != "$ruby_before" ]]; then
+            echo update=true >> $GITHUB_OUTPUT
+          fi
+        env:
+          gem_name: ${{ github.event.inputs.gem }}
+          gem_before: ${{ github.event.inputs.before }}
+          gem_after: ${{ github.event.inputs.after }}
+          EMAIL: svn-admin@ruby-lang.org
+          GIT_AUTHOR_NAME: git
+          GIT_COMMITTER_NAME: git
+
+      - name: Push
+        run: |
+          git pull --rebase origin ${GITHUB_REF#refs/heads/}
+          git push origin ${GITHUB_REF#refs/heads/}
+        if: ${{ steps.sync.outputs.update && env.DEFAULT_GEM_SYNC_ENABLED == 'true' }}
+        env:
+          EMAIL: svn-admin@ruby-lang.org
+          GIT_AUTHOR_NAME: git
+          GIT_COMMITTER_NAME: git
+
+      - uses: ./.github/actions/slack
+        with:
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+          label: "${{ github.event.inputs.gem }} (<https://github.com/${{ github.event.inputs.gem == 'rubygems' && 'rubygems' || 'ruby' }}/${{ github.event.inputs.gem }}/compare/${{ github.event.inputs.before }}...${{ github.event.inputs.after }}|diff>)"
+          event_name: workflow_dispatch
+          extra_channel_id: C05FPKAU743 # alerts-sync
+        if: ${{ failure() }}
diff --git a/.github/workflows/tarball-macos.yml b/.github/workflows/tarball-macos.yml
new file mode 100644
index 0000000000..9bec94d528
--- /dev/null
+++ b/.github/workflows/tarball-macos.yml
@@ -0,0 +1,101 @@
+name: tarball-macos (reusable)
+
+on:
+  workflow_call:
+    inputs:
+      archname:
+        description: 'archname (e.g. snapshot-master, snapshot-ruby_3_3)'
+        required: true
+        type: string
+      notify-release-channel:
+        description: 'Also send failure notifications to SNAPSHOT_SLACK_WEBHOOK_URL (schedule/release builds).'
+        required: false
+        type: boolean
+        default: false
+    secrets:
+      SIMPLER_ALERTS_URL:
+        required: false
+      SNAPSHOT_SLACK_WEBHOOK_URL:
+        required: false
+
+permissions:
+  contents: read
+
+jobs:
+  macos:
+    strategy:
+      matrix:
+        test_task: [check, test-bundled-gems, test-bundler-parallel]
+        os: [macos-26, macos-15, macos-14]
+        include:
+          - os: macos-15-intel
+            test_task: check
+      fail-fast: false
+    runs-on: ${{ matrix.os }}
+    env:
+      ARCHNAME: ${{ inputs.archname }}
+    steps:
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: Packages
+          path: pkg
+      - name: Extract
+        run: tar xf pkg/*.tar.xz
+      - name: Install libraries
+        run: |
+          with_retry () {
+            "$@" || { sleep 5 && "$@"; } || { sleep 60 && "$@"; }
+          }
+          set -x
+          with_retry brew install gmp libffi openssl zlib autoconf automake libtool libyaml
+      - name: Set ENV
+        run: |
+          echo "JOBS=-j$((1 + $(sysctl -n hw.activecpu)))" >> $GITHUB_ENV
+      - name: configure
+        run: cd "$ARCHNAME/" && ./configure --with-openssl-dir=$(brew --prefix openssl) --with-libyaml-dir=$(brew --prefix libyaml)
+      - name: make
+        run: cd "$ARCHNAME/" && make $JOBS
+      - name: Tests
+        run: cd "$ARCHNAME/" && make $JOBS -s ${{ matrix.test_task }}
+        env:
+          RUBY_TESTOPTS: "-q --tty=no"
+          RUBY_DEBUG_TEST_NO_REMOTE: "1"
+      # leaked-globals since 2.7
+      - name: Leaked Globals
+        run: cd "$ARCHNAME/" && make -s leaked-globals
+        if: matrix.test_task == 'check'
+      - name: make install without root privilege
+        run: cd "$ARCHNAME/" && make $JOBS install DESTDIR="/tmp/destdir"
+        if: matrix.test_task == 'check'
+      - name: make install
+        run: cd "$ARCHNAME/" && sudo make $JOBS install
+        if: matrix.test_task == 'check'
+      - name: Verify installed binaries
+        run: |
+          /usr/local/bin/ruby -v
+          /usr/local/bin/gem -v
+          /usr/local/bin/bundle -v
+        if: matrix.test_task == 'check'
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout: .github/actions/slack
+          sparse-checkout-cone-mode: false
+          persist-credentials: false
+        if: ${{ failure() }}
+      - uses: ./.github/actions/slack
+        with:
+          label: "${{ matrix.os }} / ${{ matrix.test_task }}"
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+      - uses: ruby/action-slack@d260b61aa817726d5bedd22dd6cc305787fa4cdd # v4.0.0
+        with:
+          payload: |
+            {
+              "attachments": [{
+                "text": "${{ job.status }}: ${{ matrix.os }} / ${{ matrix.test_task }} <https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}|${{ inputs.archname }}>",
+                "color": "danger"
+              }]
+            }
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.SNAPSHOT_SLACK_WEBHOOK_URL }}
+        if: failure() && inputs.notify-release-channel
diff --git a/.github/workflows/tarball-non-development.yml b/.github/workflows/tarball-non-development.yml
new file mode 100644
index 0000000000..db6230b301
--- /dev/null
+++ b/.github/workflows/tarball-non-development.yml
@@ -0,0 +1,87 @@
+name: tarball-non-development (reusable)
+
+on:
+  workflow_call: {}
+
+permissions:
+  contents: read
+
+jobs:
+  non_development:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { variant: default,     remove_ruby: false, configure_extra: '' }
+          - { variant: no-ruby,     remove_ruby: true,  configure_extra: '' }
+          - { variant: baseruby-no, remove_ruby: false, configure_extra: '--with-baseruby=no' }
+    runs-on: ubuntu-24.04
+    env:
+      ruby_prefix: /tmp/ruby-snapshot
+    steps:
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: Packages
+          path: pkg
+      - name: Extract
+        run: tar xf pkg/*.tar.xz
+      - name: Substitute patchlevel
+        run: |
+          set -x
+          cd snapshot-*/
+          sed -i.orig 's/^\( *# *define  *RUBY_PATCHLEVEL\)  *-.*/\1 0/' version.h
+          diff -u version.h.orig version.h || :
+          rm -f version.h.orig
+      - name: Install libraries
+        run: |
+          set -x
+          sudo apt-get update -q || :
+          sudo apt-get install --no-install-recommends -q -y build-essential libssl-dev libyaml-dev zlib1g-dev libffi-dev libgmp-dev bison- autoconf-
+      - name: Remove host ruby
+        if: matrix.remove_ruby
+        run: |
+          set -x
+          sudo apt-get purge -y -q 'ruby*' || :
+          sudo rm -rf /opt/hostedtoolcache/Ruby
+          ! command -v ruby
+      - name: Set ENV
+        run: |
+          echo "JOBS=-j$((1 + $(nproc --all)))" >> $GITHUB_ENV
+      - name: configure
+        run: cd snapshot-*/ && ./configure --prefix="${ruby_prefix}" ${{ matrix.configure_extra }}
+      - name: make
+        run: cd snapshot-*/ && make $JOBS
+      - name: Leaked Globals
+        run: cd snapshot-*/ && make -s leaked-globals
+      - name: make install
+        run: cd snapshot-*/ && make $JOBS install
+      - name: Set PATH
+        run: echo "PATH=${ruby_prefix}/bin:$PATH" >> $GITHUB_ENV
+      - name: Check patchlevel
+        id: check-patchlevel
+        run: |
+          exec "${ruby_prefix}/bin/ruby" -vx "$0"
+          #!ruby
+          puts "RUBY_PATCHLEVEL=#{RUBY_PATCHLEVEL.inspect}"
+          abort unless RUBY_PATCHLEVEL >= 0
+        working-directory: ${{ env.ruby_prefix }}
+        continue-on-error: true
+      - name: Check LOADPATH
+        id: check-loadpath
+        run: |
+          exec ${ruby_prefix}/bin/ruby -vx "$0"
+          #!ruby
+          paths = $:.grep(/\+/)
+          pp paths
+          abort unless paths.empty?
+        working-directory: ${{ env.ruby_prefix }}
+        continue-on-error: true
+      - name: Check pathnames
+        id: check-pathnames
+        run: |
+          ! find -name '*+*' | grep +
+        working-directory: ${{ env.ruby_prefix }}
+        continue-on-error: true
+      - name: result
+        run: false
+        if: ${{ contains(steps.*.outcome, 'failure') }}
diff --git a/.github/workflows/tarball-test-schedule.yml b/.github/workflows/tarball-test-schedule.yml
new file mode 100644
index 0000000000..6684b09edb
--- /dev/null
+++ b/.github/workflows/tarball-test-schedule.yml
@@ -0,0 +1,26 @@
+name: tarball-test-schedule
+on:
+  schedule:
+    - cron: '30 18 * * *' # Daily at 18:30 UTC
+  workflow_dispatch:
+
+permissions: {}
+
+jobs:
+  dispatch:
+    if: ${{ github.event_name != 'schedule' || github.repository == 'ruby/ruby' }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        branch:
+          - master
+          - ruby_4_0
+          - ruby_3_4
+          - ruby_3_3
+    steps:
+      - name: Trigger tarball-test on ${{ matrix.branch }}
+        run: gh workflow run tarball-test.yml --ref "$BRANCH" --repo "$GITHUB_REPOSITORY" -f notify-release-channel=true
+        env:
+          BRANCH: ${{ matrix.branch }}
+          GH_TOKEN: ${{ secrets.MATZBOT_GITHUB_ACTION_TOKEN }}
diff --git a/.github/workflows/tarball-test.yml b/.github/workflows/tarball-test.yml
new file mode 100644
index 0000000000..c862ab76cc
--- /dev/null
+++ b/.github/workflows/tarball-test.yml
@@ -0,0 +1,104 @@
+name: tarball-test
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    # Do not use paths-ignore for required status checks
+    # https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/troubleshooting-required-status-checks#handling-skipped-but-required-checks
+  merge_group:
+  workflow_dispatch:
+    inputs:
+      notify-release-channel:
+        description: 'Also send failure notifications to SNAPSHOT_SLACK_WEBHOOK_URL (set by tarball-test-schedule).'
+        type: boolean
+        default: false
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  tarball:
+    runs-on: ubuntu-latest
+    # Cherry-pick to maintenance branches by changing only env.BRANCH below;
+    # archname / branch-label / Materialize all derive from it.
+    env:
+      BRANCH: master
+    outputs:
+      branch: ${{ env.BRANCH }}
+      skip: ${{ steps.skipping.outputs.skip }}
+    steps:
+      - id: skipping
+        run: echo 'skip=true' >> $GITHUB_OUTPUT
+        if: >-
+          ${{(false
+          || contains(github.event.head_commit.message, '[DOC]')
+          || contains(github.event.pull_request.title, '[DOC]')
+          || contains(github.event.pull_request.labels.*.name, 'Documentation')
+          || (github.event.pull_request.user.login == 'dependabot[bot]')
+          )}}
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          fetch-depth: 1 # actions/checkout fetches all heads/tags unless > 0
+          persist-credentials: false
+      # tool/make-snapshot derives the branch name from HEAD and looks up
+      # the upstream during ChangeLog generation. Detached checkouts
+      # (pull_request, merge_group) lack a local branch with tracking, so
+      # pin one to HEAD and connect it to the matching origin ref.
+      - name: Materialize local branch
+        run: |
+          git fetch --no-tags --depth=1 origin "+refs/heads/$BASE:refs/remotes/origin/$BASE"
+          git checkout -B "$BRANCH" HEAD
+          git branch --set-upstream-to="origin/$BASE" "$BRANCH"
+        env:
+          BASE: ${{ github.base_ref || env.BRANCH }}
+      - uses: ./.github/actions/make-snapshot
+        with:
+          archname: snapshot-${{ env.BRANCH }}
+          srcdir: '.'
+
+  ubuntu:
+    needs: tarball
+    if: ${{ ! needs.tarball.outputs.skip }}
+    uses: ./.github/workflows/tarball-ubuntu.yml
+    with:
+      archname: snapshot-${{ needs.tarball.outputs.branch }}
+      notify-release-channel: ${{ github.event_name == 'workflow_dispatch' && inputs.notify-release-channel || false }}
+    secrets:
+      SIMPLER_ALERTS_URL: ${{ secrets.SIMPLER_ALERTS_URL }}
+      SNAPSHOT_SLACK_WEBHOOK_URL: ${{ secrets.SNAPSHOT_SLACK_WEBHOOK_URL }}
+
+  macos:
+    needs: tarball
+    if: ${{ ! needs.tarball.outputs.skip }}
+    uses: ./.github/workflows/tarball-macos.yml
+    with:
+      archname: snapshot-${{ needs.tarball.outputs.branch }}
+      notify-release-channel: ${{ github.event_name == 'workflow_dispatch' && inputs.notify-release-channel || false }}
+    secrets:
+      SIMPLER_ALERTS_URL: ${{ secrets.SIMPLER_ALERTS_URL }}
+      SNAPSHOT_SLACK_WEBHOOK_URL: ${{ secrets.SNAPSHOT_SLACK_WEBHOOK_URL }}
+
+  windows:
+    needs: tarball
+    if: ${{ ! needs.tarball.outputs.skip }}
+    uses: ./.github/workflows/tarball-windows.yml
+    with:
+      archname: snapshot-${{ needs.tarball.outputs.branch }}
+      notify-release-channel: ${{ github.event_name == 'workflow_dispatch' && inputs.notify-release-channel || false }}
+    secrets:
+      SIMPLER_ALERTS_URL: ${{ secrets.SIMPLER_ALERTS_URL }}
+      SNAPSHOT_SLACK_WEBHOOK_URL: ${{ secrets.SNAPSHOT_SLACK_WEBHOOK_URL }}
+
+  non_development:
+    needs: tarball
+    uses: ./.github/workflows/tarball-non-development.yml
diff --git a/.github/workflows/tarball-ubuntu.yml b/.github/workflows/tarball-ubuntu.yml
new file mode 100644
index 0000000000..e227dc29aa
--- /dev/null
+++ b/.github/workflows/tarball-ubuntu.yml
@@ -0,0 +1,151 @@
+name: tarball-ubuntu (reusable)
+
+on:
+  workflow_call:
+    inputs:
+      archname:
+        description: 'archname (e.g. snapshot-master, snapshot-ruby_3_3)'
+        required: true
+        type: string
+      notify-release-channel:
+        description: 'Also send failure notifications to SNAPSHOT_SLACK_WEBHOOK_URL (schedule/release builds).'
+        required: false
+        type: boolean
+        default: false
+    secrets:
+      SIMPLER_ALERTS_URL:
+        required: false
+      SNAPSHOT_SLACK_WEBHOOK_URL:
+        required: false
+
+permissions:
+  contents: read
+
+jobs:
+  ubuntu:
+    strategy:
+      matrix:
+        test_task: [check, test-bundler-parallel, test-bundled-gems]
+        os: [ubuntu-24.04, ubuntu-22.04]
+      fail-fast: false
+    runs-on: ${{ matrix.os }}
+    env:
+      ARCHNAME: ${{ inputs.archname }}
+    steps:
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: Packages
+          path: pkg
+      - name: Extract
+        run: tar xf pkg/*.tar.xz
+      - name: Install libraries
+        run: |
+          set -x
+          sudo apt-get update -q
+          sudo apt-get install --no-install-recommends -q -y build-essential libssl-dev libyaml-dev zlib1g-dev libffi-dev libgmp-dev bison- autoconf-
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: '3.2'
+        # test-bundled-gems requires executable host ruby
+        if: matrix.test_task == 'test-bundled-gems'
+      - name: Fixed world writable dirs
+        run: |
+          mkdir -p $HOME/.local/share
+          mkdir -p $HOME/.cache/gem/specs
+          mkdir -p $HOME/.bundle/cache
+          mkdir -p $HOME/.ssh
+          chmod a-w $HOME/.bundle
+          # chmod a-w $HOME
+          # allow to write $HOME and check stats of HOME around tests (see below)
+          chmod -v a-w $HOME/.config
+          sudo chmod -R a-w /usr/share
+          sudo bash -c 'IFS=:; for d in '"$PATH"'; do chmod -v a-w $d; done' || :
+      - name: Set ENV
+        run: |
+          echo "JOBS=-j$((1 + $(nproc --all)))" >> $GITHUB_ENV
+      - name: configure
+        run: cd "$ARCHNAME/" && ./configure
+      - name: make
+        run: cd "$ARCHNAME/" && make $JOBS
+      - name: Save stats of HOME
+        run: |
+          set -euxo pipefail
+          cat >"$ARCHNAME/save-stats.rb" <<'EOF'
+          require 'pathname'
+          require 'digest'
+          out = []
+          [
+            Dir.home,
+          ].each do |dir|
+            Dir.each_child(dir) do |name|
+              pn = File.join(dir, name)
+              st = File.stat(pn)
+              if st.file?
+                content = Digest::SHA1.file(pn).hexdigest
+              elsif st.directory? && st.nlink <= 10
+                content = Dir.children(pn).sort
+              end
+              out << [pn, "%o"%st.mode, st.nlink, st.uid, st.gid, st.size, content].to_s
+            rescue
+              out << [pn, $!.inspect].to_s
+            end
+          end
+          File.open(ARGV.shift, "w") do |io|
+            io.puts out.sort
+          end
+          EOF
+          make -C "$ARCHNAME" TESTRUN_SCRIPT=save-stats.rb RUNOPT=/tmp/stat-before-tests.txt runruby
+      - name: Tests
+        run: cd "$ARCHNAME/" && make $JOBS -s ${{ matrix.test_task }}
+        env:
+          RUBY_TESTOPTS: "-q --tty=no"
+      # test_sync_default_gems triggers gpg, whose agent processes leave
+      # $HOME/.gnupg around even when GNUPGHOME points elsewhere.
+      - name: Forcibly remove ~/.gnupg
+        run: rm -rf $HOME/.gnupg
+      - name: Diff stats of HOME
+        run: |
+          make -C "$ARCHNAME" TESTRUN_SCRIPT=save-stats.rb RUNOPT=/tmp/stat-after-tests.txt runruby
+          rm -f "$ARCHNAME/save-stats.rb"
+          diff -u /tmp/stat-before-tests.txt /tmp/stat-after-tests.txt
+      # leaked-globals since 2.7
+      - name: Leaked Globals
+        run: cd "$ARCHNAME/" && make -s leaked-globals
+        if: matrix.test_task == 'check'
+      - name: make install without root privilege
+        run: cd "$ARCHNAME/" && make $JOBS install DESTDIR="/tmp/destdir"
+        if: matrix.test_task == 'check'
+      - name: make install
+        run: cd "$ARCHNAME/" && sudo make $JOBS install
+        if: matrix.test_task == 'check'
+      - name: Verify installed binaries
+        run: |
+          /usr/local/bin/ruby -v
+          /usr/local/bin/gem -v
+          /usr/local/bin/bundle -v
+        if: matrix.test_task == 'check'
+      - name: Show .local
+        run: find $HOME/.local -ls
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout: .github/actions/slack
+          sparse-checkout-cone-mode: false
+          persist-credentials: false
+        if: ${{ failure() }}
+      - uses: ./.github/actions/slack
+        with:
+          label: "${{ matrix.os }} / ${{ matrix.test_task }}"
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+      - uses: ruby/action-slack@d260b61aa817726d5bedd22dd6cc305787fa4cdd # v4.0.0
+        with:
+          payload: |
+            {
+              "attachments": [{
+                "text": "${{ job.status }}: ${{ matrix.os }} / ${{ matrix.test_task }} <https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}|${{ inputs.archname }}>",
+                "color": "danger"
+              }]
+            }
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.SNAPSHOT_SLACK_WEBHOOK_URL }}
+        if: failure() && inputs.notify-release-channel
diff --git a/.github/workflows/tarball-windows.yml b/.github/workflows/tarball-windows.yml
new file mode 100644
index 0000000000..1ce95de6fc
--- /dev/null
+++ b/.github/workflows/tarball-windows.yml
@@ -0,0 +1,163 @@
+name: tarball-windows (reusable)
+
+on:
+  workflow_call:
+    inputs:
+      archname:
+        description: 'archname (e.g. snapshot-master)'
+        required: true
+        type: string
+      notify-release-channel:
+        description: 'Also send failure notifications to SNAPSHOT_SLACK_WEBHOOK_URL (schedule/release builds).'
+        required: false
+        type: boolean
+        default: false
+    secrets:
+      SIMPLER_ALERTS_URL:
+        required: false
+      SNAPSHOT_SLACK_WEBHOOK_URL:
+        required: false
+
+permissions:
+  contents: read
+
+jobs:
+  windows:
+    strategy:
+      matrix:
+        include:
+          - os: '2022'
+            test_task: check
+          - os: '2025-vs2026'
+            test_task: check
+      fail-fast: false
+    runs-on: windows-${{ matrix.os }}
+    defaults:
+      run:
+        shell: cmd
+        working-directory: build
+    name: Windows ${{ matrix.os }} (${{ matrix.test_task }})
+    env:
+      GITPULLOPTIONS: --no-tags origin ${{github.ref}}
+      PATCH: C:\msys64\usr\bin\patch.exe
+      OS_VER: windows-${{ matrix.os }}
+      # see https://github.com/ruby/ruby/commit/9ff4399decef0036897d3cfb9ac2c710dea913ca
+      OPENSSL_MODULES: C:\vcpkg\installed\x64-windows\bin
+    steps:
+      - run: md build
+        working-directory:
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: '3.2'
+          bundler: none
+          windows-toolchain: none
+
+      - uses: msys2/setup-msys2@e9898307ac31d1a803454791be09ab9973336e1c # v2.31.1
+        id: setup-msys2
+        with:
+          update: true
+          install: >-
+            patch
+      - name: patch path
+        shell: msys2 {0}
+        run: echo PATCH=$(cygpath -wa $(command -v patch)) >> $GITHUB_ENV
+        if: ${{ steps.setup-msys2.outcome == 'success' }}
+      - uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        with:
+          path: C:\vcpkg\installed
+          key: ${{ runner.os }}-vcpkg-installed-${{ env.OS_VER }}-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-vcpkg-installed-${{ env.OS_VER }}-
+            ${{ runner.os }}-vcpkg-installed-
+      - name: Install libraries with vcpkg
+        run: |
+          vcpkg --triplet x64-windows install gmp libffi libyaml openssl zlib
+
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: Packages
+          path: pkg
+      - name: Extract
+        run: 7z x pkg/*.zip
+        working-directory:
+
+      - uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        with:
+          path: snapshot-*/.downloaded-cache
+          key: downloaded-cache
+
+      - name: setup env
+        # %TEMP% is inconsistent with %TMP% and test-all expects they are consistent.
+        # https://github.com/actions/virtual-environments/issues/712#issuecomment-613004302
+        env:
+          ARCHNAME: ${{ inputs.archname }}
+        run: |
+          set > old.env
+          call ..\%ARCHNAME%\win32\vssetup.cmd
+          set TMP=%USERPROFILE%\AppData\Local\Temp
+          set TEMP=%USERPROFILE%\AppData\Local\Temp
+          set /a TEST_JOBS=(15 * %NUMBER_OF_PROCESSORS% / 10) > nul
+          set > new.env
+
+      - name: update env
+        shell: pwsh
+        run: |
+          $old = (Get-Content old.env); $new = (Get-Content new.env)
+          del *.env
+          Compare-Object $old $new |
+            Where-Object { $_.SideIndicator -eq '=>' } |
+            Select-Object -ExpandProperty InputObject |
+            Add-Content -Path $env:GITHUB_ENV
+      - name: link libraries
+        run: |
+          for %%I in (C:\vcpkg\installed\x64-windows\bin\*.dll) do (
+            mklink %%~nxI %%I
+          )
+      - name: Configure
+        env:
+          ARCHNAME: ${{ inputs.archname }}
+        run: >-
+          ../%ARCHNAME%/win32/configure.bat --disable-install-doc
+          --with-opt-dir=C:/vcpkg/installed/x64-windows
+      - run: nmake incs
+      - run: nmake extract-extlibs
+      - run: nmake
+        env:
+          YACC: win_bison
+
+      - name: ruby -v
+        run: .\ruby -v
+
+      - run: nmake test
+        timeout-minutes: 5
+
+      - run: nmake ${{ matrix.test_task }}
+        env:
+          RUBY_TESTOPTS: -j${{env.TEST_JOBS}}
+        timeout-minutes: 70
+        continue-on-error: ${{ matrix.continue-on-error || false }}
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout: .github/actions/slack
+          sparse-checkout-cone-mode: false
+          persist-credentials: false
+        if: ${{ failure() }}
+      - uses: ./.github/actions/slack
+        with:
+          label: "${{ env.OS_VER }} / ${{ matrix.test_task }}"
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+      - uses: ruby/action-slack@d260b61aa817726d5bedd22dd6cc305787fa4cdd # v4.0.0
+        with:
+          payload: |
+            {
+              "attachments": [{
+                "text": "${{ job.status }}: ${{ env.OS_VER }} / ${{ matrix.test_task }} <https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}|${{ inputs.archname }}>",
+                "color": "danger"
+              }]
+            }
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.SNAPSHOT_SLACK_WEBHOOK_URL }}
+        if: failure() && inputs.notify-release-channel
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
new file mode 100644
index 0000000000..09e96f764c
--- /dev/null
+++ b/.github/workflows/ubuntu.yml
@@ -0,0 +1,275 @@
+name: Ubuntu
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    # Do not use paths-ignore for required status checks
+    # https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/troubleshooting-required-status-checks#handling-skipped-but-required-checks
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  make:
+    strategy:
+      matrix:
+        # We enumerate every job in matrix.include to save build time
+        include:
+          - test_task: check
+            configure: 'cppflags=-DVM_CHECK_MODE'
+          - test_task: check
+            arch: i686
+          - test_task: check
+            configure: '--disable-yjit'
+          - test_task: check
+            configure: '--enable-shared --enable-load-relative'
+          - test_task: test-bundler-parallel
+            timeout: 50
+          - test_task: test-bundled-gems
+          - test_task: check
+            os: ubuntu-24.04
+            extra_checks: [capi]
+          # ubuntu-24.04-arm jobs don't start on ruby/ruby as of 2025-10-29
+          #- test_task: check
+          #  os: ubuntu-24.04-arm
+      fail-fast: false
+
+    env: &make-env
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+      RUBY_DEBUG: ci
+
+    runs-on: ${{ matrix.os || 'ubuntu-22.04' }}
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    steps: &make-steps
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout-cone-mode: false
+          sparse-checkout: /.github
+          persist-credentials: false
+
+      - uses: ./.github/actions/setup/ubuntu
+        with:
+          arch: ${{ matrix.arch }}
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: '3.1'
+          bundler: none
+        if: >-
+          ${{ !endsWith(matrix.os, 'arm')
+          && !endsWith(matrix.os, 'ppc64le') && !endsWith(matrix.os, 's390x') }}
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+          clean: true
+          dummy-files: ${{ matrix.test_task == 'check' }}
+          # Set fetch-depth: 10 so that Launchable can receive commits information.
+          fetch-depth: 10
+
+      - name: Run configure
+        env:
+          arch: ${{ matrix.arch }}
+          configure: ${{ matrix.configure }}
+        run: >-
+          $SETARCH ../src/configure -C --disable-install-doc ${configure:- --enable-debug-env cppflags=-DRUBY_DEBUG}
+          ${arch:+--target=$arch-$OSTYPE --host=$arch-$OSTYPE}
+
+      - run: $SETARCH make prepare-gems
+        if: ${{ matrix.test_task == 'test-bundled-gems' }}
+
+      - run: $SETARCH make
+
+      - run: $SETARCH make hello
+
+      - name: runirb
+        run: |
+          echo IRB::VERSION | $SETARCH make runirb RUNOPT="-- -f"
+
+      - name: Set test options for skipped tests
+        run: |
+          set -x
+          TESTS="$(echo "${{ matrix.skipped_tests }}" | sed 's| |$$/ -n!/|g;s|^|-n!/|;s|$|$$/|')"
+          echo "TESTS=${TESTS}" >> $GITHUB_ENV
+        if: ${{ matrix.test_task == 'check' && matrix.skipped_tests }}
+
+      - name: Set up Launchable
+        id: launchable
+        uses: ./.github/actions/launchable/setup
+        with:
+          os: ${{ matrix.os || 'ubuntu-22.04' }}
+          test-opts: ${{ matrix.configure }}
+          launchable-token: ${{ secrets.LAUNCHABLE_TOKEN }}
+          builddir: build
+          srcdir: src
+        continue-on-error: true
+        timeout-minutes: 3
+
+      # Avoid possible test failures with the zlib applying the following patch
+      # on s390x CPU architecture.
+      # https://github.com/madler/zlib/pull/410
+      - name: Disable DFLTCC
+        run: echo "DFLTCC=0" >> $GITHUB_ENV
+        if: ${{ endsWith(matrix.os, 's390x') }}
+
+      - name: make ${{ matrix.test_task }}
+        run: |
+          test -n "${LAUNCHABLE_STDOUT}" && exec 1> >(tee "${LAUNCHABLE_STDOUT}")
+          test -n "${LAUNCHABLE_STDERR}" && exec 2> >(tee "${LAUNCHABLE_STDERR}")
+
+          $SETARCH make -s ${{ matrix.test_task }} \
+          ${TESTS:+TESTS="$TESTS"} \
+          ${{ !contains(matrix.test_task, 'bundle') && 'RUBYOPT=-w' || '' }}
+        timeout-minutes: ${{ matrix.timeout || 40 }}
+        env:
+          RUBY_TESTOPTS: '-q --tty=no'
+          TEST_BUNDLED_GEMS_ALLOW_FAILURES: ''
+          PRECHECK_BUNDLED_GEMS: 'no'
+          LAUNCHABLE_STDOUT: ${{ steps.launchable.outputs.stdout_report_path }}
+          LAUNCHABLE_STDERR: ${{ steps.launchable.outputs.stderr_report_path }}
+
+      - name: make skipped tests
+        run: |
+          $SETARCH make -s test-all TESTS="${TESTS//-n!\//-n/}"
+        env:
+          GNUMAKEFLAGS: ''
+          RUBY_TESTOPTS: '-v --tty=no'
+        if: ${{ matrix.test_task == 'check' && matrix.skipped_tests }}
+        continue-on-error: ${{ matrix.continue-on-skipped_tests || false }}
+
+      - name: test-pc
+        run: |
+          DESTDIR=${RUNNER_TEMP-${TMPDIR-/tmp}}/installed
+          $SETARCH make test-pc "DESTDIR=$DESTDIR"
+
+      - name: CAPI extensions
+        uses: ./.github/actions/capiext
+        with:
+          builddir: build
+          make: '$SETARCH make'
+        env:
+          RUBY_TESTOPTS: '-v --tty=no'
+        if: ${{ contains(matrix.extra_checks, 'capi') }}
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ${{ matrix.test_task }} ${{ matrix.configure }}${{ matrix.arch }}${{ matrix.os }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+  make-ibm:
+    strategy:
+      matrix:
+        include:
+          - test_task: check
+            os: ubuntu-24.04-ppc64le
+          - test_task: check
+            os: ubuntu-24.04-s390x
+      fail-fast: false
+
+    env: *make-env
+
+    runs-on: ${{ matrix.os }}
+
+    if: >-
+      ${{github.repository == 'ruby/ruby'
+      && !(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    steps: *make-steps
+
+  # Separated from `make` job to avoid making it a required status check
+  ruby-bench:
+    strategy:
+      matrix:
+        include:
+          # Using the same setup as ZJIT jobs
+          - bench_opts: '--warmup=1 --bench=1 --excludes=shipit'
+
+    runs-on: ubuntu-24.04
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - uses: ./.github/actions/setup/ubuntu
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+
+      - name: Run configure
+        run: ../src/configure -C --disable-install-doc --prefix="$(pwd)/install"
+
+      - run: make install
+
+      - name: Checkout ruby-bench
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          repository: ruby/ruby-bench
+          persist-credentials: false
+          path: ruby-bench
+
+      # If you want to skip failing benchmark, consider using `--excludes`.
+      # e.g. `bench_opts: '--warmup=1 --bench=1 --excludes=railsbench,lobsters'`
+      - name: Run ruby-bench
+        run: ruby run_benchmarks.rb -e "ruby::../build/install/bin/ruby" ${{ matrix.bench_opts }}
+        working-directory: ruby-bench
+        env:
+          BUNDLER_VERSION: 0
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ruby-bench ${{ matrix.bench_opts }} ${{ matrix.ruby_opts }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+  result:
+    if: ${{ always() }}
+    name: ${{ github.workflow }} result
+    runs-on: ubuntu-latest
+    needs: [make]
+    steps:
+      - run: exit 1
+        working-directory:
+        if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
+
+defaults:
+  run:
+    working-directory: build
diff --git a/.github/workflows/wasm.yml b/.github/workflows/wasm.yml
new file mode 100644
index 0000000000..edb2c76c48
--- /dev/null
+++ b/.github/workflows/wasm.yml
@@ -0,0 +1,195 @@
+name: WebAssembly
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions: # added using https://github.com/step-security/secure-workflows
+  contents: read
+
+jobs:
+  make:
+    strategy:
+      matrix:
+        entry:
+#         # wasmtime can't compile non-optimized Asyncified binary due to locals explosion
+#         - { name: O0-debuginfo, optflags: '-O0', debugflags: '-g', wasmoptflags: '-O1' }
+#         - { name: O1,           optflags: '-O1', debugflags: ''  , wasmoptflags: '-O1' }
+          - { name: O2, optflags: '-O2', debugflags: '', wasmoptflags: '-O2' }
+#         - { name: O3,           optflags: '-O3', debugflags: ''  , wasmoptflags: '-O3' }
+#         # -O4 is equivalent to -O3 in clang, but it's different in wasm-opt
+#         - { name: O4,           optflags: '-O3', debugflags: ''  , wasmoptflags: '-O4' }
+#         - { name: Oz,           optflags: '-Oz', debugflags: ''  , wasmoptflags: '-Oz' }
+      fail-fast: false
+
+    env:
+      RUBY_TESTOPTS: '-q --tty=no'
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+      WASI_SDK_VERSION_MAJOR: 25
+      WASI_SDK_VERSION_MINOR: 0
+      BINARYEN_VERSION: 113
+      WASMTIME_VERSION: v15.0.0
+
+    runs-on: ubuntu-22.04
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout-cone-mode: false
+          sparse-checkout: /.github
+          persist-credentials: false
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: '3.1'
+          bundler: none
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+
+      - name: Install libraries
+        run: |
+          set -ex
+          sudo apt-get update -q || :
+          sudo apt-get install --no-install-recommends -q -y ruby make autoconf git wget
+
+          wasi_sdk_deb="wasi-sdk-${WASI_SDK_VERSION_MAJOR}.${WASI_SDK_VERSION_MINOR}-x86_64-linux.deb"
+          wget "https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-${WASI_SDK_VERSION_MAJOR}/${wasi_sdk_deb}"
+          sudo dpkg -i "$wasi_sdk_deb"
+          rm -f "$wasi_sdk_deb"
+
+          mkdir build-sdk
+          pushd build-sdk
+
+          wasmtime_url="https://github.com/bytecodealliance/wasmtime/releases/download/${WASMTIME_VERSION}/wasmtime-${WASMTIME_VERSION}-x86_64-linux.tar.xz"
+          wget -O - "$wasmtime_url" | tar xJf -
+          sudo ln -fs "$PWD/wasmtime-${WASMTIME_VERSION}-x86_64-linux/wasmtime" /usr/local/bin/wasmtime
+
+          binaryen_tarball="binaryen-version_${BINARYEN_VERSION}-x86_64-linux.tar.gz"
+          binaryen_url="https://github.com/WebAssembly/binaryen/releases/download/version_${BINARYEN_VERSION}/${binaryen_tarball}"
+          wget -O - "$binaryen_url" | tar xfz -
+          sudo ln -fs "$PWD/binaryen-version_${BINARYEN_VERSION}/bin/wasm-opt" /usr/local/bin/wasm-opt
+        working-directory: src
+
+      - name: Set ENV
+        run: |
+          echo "WASI_SDK_PATH=/opt/wasi-sdk" >> $GITHUB_ENV
+
+      - uses: ./.github/actions/setup/baseruby
+        id: baseruby
+        with:
+          srcdir: src
+
+      - name: Download config.guess with wasi version
+        run: |
+          rm tool/config.guess tool/config.sub
+          ruby tool/downloader.rb -d tool -e gnu config.guess config.sub
+        working-directory: src
+
+      - name: Run configure
+        run: >-
+          ../src/configure
+          --host wasm32-unknown-wasi
+          --with-baseruby="${{ steps.baseruby.outputs.ruby }}"
+          --with-dump-ast="${{ steps.baseruby.outputs.dump_ast }}"
+          --with-static-linked-ext
+          --with-ext=${EXTS// /,}
+          LDFLAGS="
+          -Xlinker --stack-first
+          -Xlinker -z -Xlinker stack-size=16777216
+          "
+          optflags="${{ matrix.entry.optflags }}"
+          debugflags="${{ matrix.entry.debugflags }}"
+          wasmoptflags="${{ matrix.entry.wasmoptflags }} ${{ matrix.entry.debugflags }}"
+        env:
+          EXTS:
+            cgi/escape
+            continuation
+            coverage
+            date
+            digest
+            digest/*
+            erb/escape
+            etc
+            fcntl
+            json
+            json/*
+            objspace
+            rbconfig/sizeof
+            ripper
+            stringio
+            strscan
+
+      # miniruby may not be built when cross-compling
+      - run: make mini ruby
+
+      - run: make install DESTDIR=$PWD/../install
+      - run: tar cfz ../install.tar.gz -C ../install .
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: ruby-wasm-install
+          path: ${{ github.workspace }}/install.tar.gz
+      - name: Show Playground URL to try the build
+        run: |
+          echo "Try on Playground: https://ruby.github.io/play-ruby?run=$GITHUB_RUN_ID" >> $GITHUB_STEP_SUMMARY
+
+      - name: Run basictest
+        run: wasmtime run ./../build/miniruby --mapdir /::./ -- basictest/test.rb
+        working-directory: src
+
+      - name: Run bootstraptest (no thread)
+        run: |
+          NO_THREAD_TESTS="$(grep -L Thread -R ./bootstraptest | awk -F/ '{ print $NF }' | uniq | sed -n 's/test_\(.*\).rb/\1/p' | paste -s -d, -)"
+          ruby ./bootstraptest/runner.rb --ruby="$(which wasmtime) run $PWD/../build/ruby --mapdir /::./ -- " --verbose "--sets=$NO_THREAD_TESTS"
+        working-directory: src
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ${{ matrix.entry.name }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+      # Workaround for https://github.com/orgs/community/discussions/25220
+      - name: Save Pull Request number
+        if: ${{ github.event_name == 'pull_request' }}
+        run: echo "${{ github.event.pull_request.number }}" >> ${{ github.workspace }}/github-pr-info.txt
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        if: ${{ github.event_name == 'pull_request' }}
+        with:
+          name: github-pr-info
+          path: ${{ github.workspace }}/github-pr-info.txt
+
+defaults:
+  run:
+    working-directory: build
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
new file mode 100644
index 0000000000..13551427bb
--- /dev/null
+++ b/.github/workflows/windows.yml
@@ -0,0 +1,209 @@
+name: Windows
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    # Do not use paths-ignore for required status checks
+    # https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/troubleshooting-required-status-checks#handling-skipped-but-required-checks
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  make:
+    strategy:
+      matrix:
+        include:
+          - os: 2022
+            test_task: check
+          - os: 2022
+            test_task: test-bundled-gems
+          - os: 2025-vs2026
+            test_task: check
+          - os: 2025-vs2026
+            test_task: test-bundled-gems
+          - os: 11-arm
+            test_task: 'btest test-basic test-tool' # check and test-spec are broken yet.
+            target: arm64
+      fail-fast: false
+
+    runs-on: windows-${{ matrix.os }}
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]' && !startsWith(github.head_ref, 'dependabot/vcpkg'))
+      )}}
+
+    name: Windows ${{ matrix.os }} (${{ matrix.test_task }})
+
+    env:
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+      VCPKG_DEFAULT_TRIPLET: ${{ matrix.target || 'x64' }}-windows
+
+    steps:
+      - run: md build
+        working-directory:
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          # windows-11-arm has only 3.4.1, 3.4.2, 3.4.3, head
+          ruby-version: ${{ !endsWith(matrix.os, 'arm') && '3.1' || '3.4' }}
+          bundler: none
+          windows-toolchain: none
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+          sparse-checkout-cone-mode: false
+          sparse-checkout: /.github
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          make-command: nmake
+          clean: true
+
+      - name: Install tools with scoop
+        run: |
+          if ((vcpkg.exe help install) -match "manifest") { exit }
+          Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
+          iwr -useb get.scoop.sh | iex
+          Join-Path (Resolve-Path ~).Path "scoop\shims" >> $Env:GITHUB_PATH
+          scoop install vcpkg
+        shell: pwsh
+
+      - name: Restore vcpkg artifact
+        id: restore-vcpkg
+        uses: actions/cache/restore@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        with:
+          path: src\vcpkg_installed
+          key: windows-${{ matrix.os }}-vcpkg-${{ hashFiles('src/vcpkg.json') }}
+
+      - name: Install libraries with vcpkg
+        run: |
+          vcpkg install
+        working-directory: src
+        if: ${{ ! steps.restore-vcpkg.outputs.cache-hit }}
+
+      - name: Save vcpkg artifact
+        uses: actions/cache/save@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        with:
+          path: src\vcpkg_installed
+          key: windows-${{ matrix.os }}-vcpkg-${{ hashFiles('src/vcpkg.json') }}
+        if: ${{ ! steps.restore-vcpkg.outputs.cache-hit && (github.ref_name == 'master' || startsWith(github.ref_name, 'ruby_')) }}
+
+      - name: setup env
+        # Available Ruby versions: https://github.com/actions/runner-images/blob/main/images/windows/Windows2019-Readme.md#ruby
+        # %TEMP% is inconsistent with %TMP% and test-all expects they are consistent.
+        # https://github.com/actions/virtual-environments/issues/712#issuecomment-613004302
+        run: |
+          set > old.env
+          call ..\src\win32\vssetup.cmd ^
+            -arch=${{ matrix.target || 'amd64' }} ^
+            ${{ matrix.vcvars && '-vcvars_ver=' || '' }}${{ matrix.vcvars }}
+          nmake -f nul
+          set TMP=%RUNNER_TEMP%
+          set TEMP=%RUNNER_TEMP%
+          set MAKEFLAGS=l
+          set /a TEST_JOBS=(15 * %NUMBER_OF_PROCESSORS% / 10) > nul
+          set RUBY_OPT_DIR=%GITHUB_WORKSPACE:\=/%/src/vcpkg_installed/%VCPKG_DEFAULT_TRIPLET%
+          set > new.env
+
+      - name: update env
+        shell: pwsh
+        run: |
+          $old = (Get-Content old.env); $new = (Get-Content new.env)
+          del *.env
+          Compare-Object $old $new |
+            Where-Object { $_.SideIndicator -eq '=>' } |
+            Select-Object -ExpandProperty InputObject |
+            Add-Content -Path $env:GITHUB_ENV
+
+      - name: baseruby version
+        run: ruby -v
+
+      - name: compiler version
+        run: cl
+
+      - name: volume info
+        run: Get-Volume
+        shell: pwsh
+
+      # TODO: We should use `../src` instead of `D:/a/ruby/ruby/src`
+      - name: Configure
+        run: >-
+          ../src/win32/configure.bat --disable-install-doc
+          --with-opt-dir=%RUBY_OPT_DIR%
+          --with-gmp
+
+      - run: nmake prepare-vcpkg
+
+      - run: nmake incs
+
+      - run: nmake extract-extlibs
+
+      # On all other platforms, test-spec depending on extract-gems (in common.mk) is enough.
+      # But not for this Visual Studio workflow. So here we extract gems before building.
+      - run: nmake extract-gems
+
+      # windows-11-arm runner cannot run `ruby tool/file2lastrev.rb --revision.h --output=revision.h`
+      - name: make revision.h
+        run: |
+          win32\lastrev.bat | win32\ifchange.bat --timestamp=.revision.time revision.h -
+          type revision.h
+        working-directory: src
+
+      - run: nmake
+
+      - name: Set up Launchable
+        uses: ./.github/actions/launchable/setup
+        with:
+          os: windows-${{ matrix.os }}
+          launchable-token: ${{ secrets.LAUNCHABLE_TOKEN }}
+          builddir: build
+          srcdir: src
+          test-task: ${{ matrix.test_task || 'check' }}
+        continue-on-error: true
+        if: ${{ matrix.test_task != 'test-bundled-gems' }}
+        timeout-minutes: 3
+
+      - run: nmake ${{ matrix.test_task || 'check' }}
+        env:
+          RUBY_TESTOPTS: -j${{ env.TEST_JOBS || 4 }}
+        timeout-minutes: 70
+
+      - uses: ./.github/actions/slack
+        with:
+          label: Windows ${{ matrix.os }} / ${{ matrix.test_task || 'check' }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+  result:
+    if: ${{ always() }}
+    name: ${{ github.workflow }} result
+    runs-on: windows-2025-vs2026
+    needs: [make]
+    steps:
+      - run: exit 1
+        working-directory:
+        if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
+
+defaults:
+  run:
+    working-directory: build
+    shell: cmd
diff --git a/.github/workflows/wsl.yml b/.github/workflows/wsl.yml
new file mode 100644
index 0000000000..470b68fe66
--- /dev/null
+++ b/.github/workflows/wsl.yml
@@ -0,0 +1,73 @@
+name: Ubuntu on WSL
+
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    # Do not use paths-ignore for required status checks
+    # https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/troubleshooting-required-status-checks#handling-skipped-but-required-checks
+  merge_group:
+
+permissions:
+  contents: read
+
+jobs:
+  wsl:
+    runs-on: windows-2025-vs2026
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]')
+      )}}
+
+    steps:
+      - name: Install or update WSL
+        uses: Ubuntu/WSL/.github/actions/wsl-install@main
+        with:
+          distro: Ubuntu-24.04
+
+      - name: Install dependencies
+        uses: Ubuntu/WSL/.github/actions/wsl-bash@main
+        with:
+         distro: Ubuntu-24.04
+         working-dir: /tmp/github/
+         exec: |
+            DEBIAN_FRONTEND=noninteractive sudo apt update
+            DEBIAN_FRONTEND=noninteractive sudo apt install -y ruby build-essential autoconf libssl-dev libyaml-dev zlib1g-dev libgmp-dev libffi-dev
+
+      - name: Check out the repository
+        uses: Ubuntu/WSL/.github/actions/wsl-checkout@main
+        with:
+          distro: Ubuntu-24.04
+          working-dir: /tmp/github/
+          submodules: true
+
+      - name: Build
+        uses: Ubuntu/WSL/.github/actions/wsl-bash@main
+        with:
+         distro: Ubuntu-24.04
+         working-dir: /tmp/github/
+         exec: |
+            ./autogen.sh
+            ./configure --disable-install-doc
+            make ruby -j4
+            make extract-gems
+            make -j4
+
+      - name: Test
+        uses: Ubuntu/WSL/.github/actions/wsl-bash@main
+        with:
+         distro: Ubuntu-24.04
+         working-dir: /tmp/github/
+         exec: |
+            ./ruby -v
+            # make check TESTS="-j4" MSPECOPT="-j"
diff --git a/.github/workflows/yjit-macos.yml b/.github/workflows/yjit-macos.yml
new file mode 100644
index 0000000000..b52c6355ad
--- /dev/null
+++ b/.github/workflows/yjit-macos.yml
@@ -0,0 +1,201 @@
+name: YJIT macOS
+on:
+  push:
+    branches:
+      - master
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopened
+    # Do not use paths-ignore for required status checks
+    # https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/troubleshooting-required-status-checks#handling-skipped-but-required-checks
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  cargo:
+    name: cargo test
+
+    runs-on: macos-26
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]' && !startsWith(github.head_ref, 'dependabot/cargo'))
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - run: RUST_BACKTRACE=1 cargo test
+        working-directory: yjit
+
+      # Also compile and test with all features enabled
+      - run: RUST_BACKTRACE=1 cargo test --all-features
+        working-directory: yjit
+
+      # Check that we can build in release mode too
+      - run: cargo build --release
+        working-directory: yjit
+
+  make:
+    strategy:
+      matrix:
+        include:
+          - test_task: 'check'
+            configure: '--enable-yjit'
+            yjit_opts: '--yjit'
+          - test_task: 'check'
+            configure: '--enable-yjit=dev'
+            yjit_opts: '--yjit-call-threshold=1 --yjit-verify-ctx --yjit-code-gc'
+            specopts: '-T --yjit-call-threshold=1 -T --yjit-verify-ctx -T --yjit-code-gc'
+      fail-fast: false
+
+    env:
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+      RUN_OPTS: ${{ matrix.yjit_opts }}
+      SPECOPTS: ${{ matrix.specopts }}
+
+    runs-on: macos-26
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]' && !startsWith(github.head_ref, 'dependabot/cargo'))
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout-cone-mode: false
+          sparse-checkout: /.github
+          persist-credentials: false
+
+      - name: Install libraries
+        uses: ./.github/actions/setup/macos
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+          dummy-files: ${{ matrix.test_task == 'check' }}
+          # Set fetch-depth: 10 so that Launchable can receive commits information.
+          fetch-depth: 10
+
+      - name: Run configure
+        run: ../src/configure -C --disable-install-doc ${{ matrix.configure }}
+
+      - run: make prepare-gems
+        if: ${{ matrix.test_task == 'test-bundled-gems' }}
+
+      - run: make
+
+      - name: Verify that --yjit-dump-disasm works
+        run: |
+          ./miniruby --yjit-call-threshold=1 --yjit-dump-disasm -e0 | \
+          wc -l | \
+          ruby -ne 'raise "Disassembly seems broken in dev build (output has too few lines)" unless $_.to_i > 10'
+        if: ${{ contains(matrix.configure, 'jit=dev') }}
+
+      - name: Set ENV for YJIT
+        run: |
+          echo "RUBY_YJIT_ENABLE=1" >> $GITHUB_ENV
+          echo "RUBY_CRASH_REPORT=$(pwd)/rb_crash_%p.txt" >> $GITHUB_ENV
+
+      - name: Set test options for skipped tests
+        run: |
+          set -x
+          TESTS="$(echo "${{ matrix.skipped_tests }}" | sed 's| |$$/ -n!/|g;s|^|-n!/|;s|$|$$/|')"
+          echo "TESTS=${TESTS}" >> $GITHUB_ENV
+        if: ${{ matrix.test_task == 'check' && matrix.skipped_tests }}
+
+      - name: Set up Launchable
+        id: launchable
+        uses: ./.github/actions/launchable/setup
+        with:
+          os: macos-26
+          test-opts: ${{ matrix.configure }}
+          launchable-token: ${{ secrets.LAUNCHABLE_TOKEN }}
+          builddir: build
+          srcdir: src
+          is-yjit: true
+        continue-on-error: true
+        timeout-minutes: 3
+
+      - name: make ${{ matrix.test_task }}
+        run: |
+          test -n "${LAUNCHABLE_STDOUT}" && exec 1> >(tee "${LAUNCHABLE_STDOUT}")
+          test -n "${LAUNCHABLE_STDERR}" && exec 2> >(tee "${LAUNCHABLE_STDERR}")
+
+          set -x
+          make -s ${{ matrix.test_task }} ${TESTS:+TESTS="$TESTS"} \
+            RUN_OPTS="$RUN_OPTS" \
+            SPECOPTS="$SPECOPTS"
+        timeout-minutes: 60
+        env:
+          RUBY_TESTOPTS: '-q --tty=no'
+          TEST_BUNDLED_GEMS_ALLOW_FAILURES: ''
+          SYNTAX_SUGGEST_TIMEOUT: '5'
+          PRECHECK_BUNDLED_GEMS: 'no'
+          LAUNCHABLE_STDOUT: ${{ steps.launchable.outputs.stdout_report_path }}
+          LAUNCHABLE_STDERR: ${{ steps.launchable.outputs.stderr_report_path }}
+        continue-on-error: ${{ matrix.continue-on-test_task || false }}
+
+      - name: make skipped tests
+        run: |
+          make -s test-all TESTS="${TESTS//-n!\//-n/}"
+        env:
+          GNUMAKEFLAGS: ''
+          RUBY_TESTOPTS: '-v --tty=no'
+          PRECHECK_BUNDLED_GEMS: 'no'
+        if: ${{ matrix.test_task == 'check' && matrix.skipped_tests }}
+        continue-on-error: ${{ matrix.continue-on-skipped_tests || false }}
+
+      - name: Dump crash logs
+        if: ${{ failure() }}
+        continue-on-error: true
+        run: |
+          tail --verbose --lines=+1 rb_crash_*.txt
+          exit 1
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ${{ matrix.test_task }} ${{ matrix.configure }} ${{ matrix.yjit_opts }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+  result:
+    if: ${{ always() }}
+    name: ${{ github.workflow }} result
+    runs-on: ubuntu-latest
+    needs: [make]
+    steps:
+      - name: ${{ github.workflow }} jobs have failed
+        run: exit 1
+        working-directory:
+        if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
+
+defaults:
+  run:
+    working-directory: build
diff --git a/.github/workflows/yjit-ubuntu.yml b/.github/workflows/yjit-ubuntu.yml
new file mode 100644
index 0000000000..934c3f56d4
--- /dev/null
+++ b/.github/workflows/yjit-ubuntu.yml
@@ -0,0 +1,245 @@
+name: YJIT Ubuntu
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    # Do not use paths-ignore for required status checks
+    # https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/troubleshooting-required-status-checks#handling-skipped-but-required-checks
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  cargo:
+    name: cargo test
+
+    # GitHub Action's image seems to already contain a Rust 1.58.0.
+    runs-on: ubuntu-22.04
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]' && !startsWith(github.head_ref, 'dependabot/cargo'))
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      # For now we can't run cargo test --offline because it complains about the
+      # capstone dependency, even though the dependency is optional
+      #- run: cargo test --offline
+
+      - run: RUST_BACKTRACE=1 cargo test
+        working-directory: yjit
+
+      # Also compile and test with all features enabled
+      - run: RUST_BACKTRACE=1 cargo test --all-features
+        working-directory: yjit
+
+      # Check that we can build in release mode too
+      - run: cargo build --release
+        working-directory: yjit
+
+  lint:
+    name: cargo clippy
+
+    # GitHub Action's image seems to already contain a Rust 1.58.0.
+    runs-on: ubuntu-22.04
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]' && !startsWith(github.head_ref, 'dependabot/cargo'))
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      # Check that we don't have linting errors in release mode, too
+      - run: cargo clippy --all-targets --all-features
+        working-directory: yjit
+
+  make:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - test_task: 'yjit-bindgen'
+            hint: 'To fix: use patch in logs'
+            # Build with YJIT+ZJIT for output that works in the most number of configurations
+            configure: '--with-gcc=clang-14 --enable-yjit=dev --enable-zjit'
+            libclang_path: '/usr/lib/llvm-14/lib/libclang.so.1'
+
+          - test_task: 'check'
+            # YJIT should be automatically built in release mode on x86-64 Linux with rustc present
+            #configure: "--enable-yjit RUSTC='rustc +1.58.0'"
+            configure: "RUSTC='rustc +1.58.0'"
+            rust_version: '1.58.0'
+
+          - test_task: 'check'
+            configure: '--enable-yjit=dev'
+
+          - test_task: 'check'
+            configure: '--enable-yjit=dev'
+            yjit_opts: '--yjit-call-threshold=1 --yjit-verify-ctx --yjit-code-gc'
+            specopts: '-T --yjit-call-threshold=1 -T --yjit-verify-ctx -T --yjit-code-gc'
+
+          - test_task: 'test-bundled-gems'
+            configure: '--enable-yjit=dev'
+
+    env:
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+      RUN_OPTS: ${{ matrix.yjit_opts }}
+      YJIT_BENCH_OPTS: ${{ matrix.yjit_bench_opts }}
+      SPECOPTS: ${{ matrix.specopts }}
+      RUBY_DEBUG: ci
+      RUST_BACKTRACE: 1
+
+    runs-on: ubuntu-22.04
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]' && !startsWith(github.head_ref, 'dependabot/cargo'))
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout-cone-mode: false
+          sparse-checkout: /.github
+          persist-credentials: false
+
+      - uses: ./.github/actions/setup/ubuntu
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: '3.1'
+          bundler: none
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+          dummy-files: ${{ matrix.test_task == 'check' }}
+          # Set fetch-depth: 10 so that Launchable can receive commits information.
+          fetch-depth: 10
+
+      - name: Install Rust
+        if: ${{ matrix.rust_version }}
+        run: rustup install ${{ matrix.rust_version }} --profile minimal
+
+      - name: Remove cargo
+        # Since this tests a `rustc` build for release, remove `cargo` to ensure
+        # that only `rustc` is used.
+        if: ${{ contains(matrix.configure, 'rustc') }}
+        run: sudo rm $(which -a cargo | uniq)
+
+      - name: Run configure
+        run: ../src/configure -C --disable-install-doc --prefix=$(pwd)/install ${{ matrix.configure }}
+
+      - run: make incs
+
+      - run: make prepare-gems
+        if: ${{ matrix.test_task == 'test-bundled-gems' }}
+
+      - run: make
+
+      - name: Verify that --yjit-dump-disasm works
+        run: |
+          ./miniruby --yjit-call-threshold=1 --yjit-dump-disasm -e0 | \
+          wc -l | \
+          ruby -ne 'raise "Disassembly seems broken in dev build (output has too few lines)" unless $_.to_i > 10'
+        if: ${{ contains(matrix.configure, 'jit=dev') }}
+
+      - name: Set ENV for YJIT
+        run: |
+          echo "RUBY_YJIT_ENABLE=1" >> $GITHUB_ENV
+          echo "RUBY_CRASH_REPORT=$(pwd)/rb_crash_%p.txt" >> $GITHUB_ENV
+
+      # Check that the binary was built with YJIT
+      - name: Check YJIT enabled
+        run: ./miniruby --yjit -v | grep "+YJIT"
+
+      - name: Set up Launchable
+        id: launchable
+        uses: ./.github/actions/launchable/setup
+        with:
+          os: ubuntu-22.04
+          test-opts: ${{ matrix.configure }}
+          launchable-token: ${{ secrets.LAUNCHABLE_TOKEN }}
+          builddir: build
+          srcdir: src
+          is-yjit: true
+        continue-on-error: true
+        timeout-minutes: 3
+
+      - name: make ${{ matrix.test_task }}
+        run: |
+          test -n "${LAUNCHABLE_STDOUT}" && exec 1> >(tee "${LAUNCHABLE_STDOUT}")
+          test -n "${LAUNCHABLE_STDERR}" && exec 2> >(tee "${LAUNCHABLE_STDERR}")
+
+          set -x
+          make -s ${{ matrix.test_task }} ${TESTS:+TESTS="$TESTS"} \
+            RUN_OPTS="$RUN_OPTS" MSPECOPT=--debug SPECOPTS="$SPECOPTS" \
+            YJIT_BENCH_OPTS="$YJIT_BENCH_OPTS" YJIT_BINDGEN_DIFF_OPTS="$YJIT_BINDGEN_DIFF_OPTS"
+        timeout-minutes: 90
+        env:
+          RUBY_TESTOPTS: '-q --tty=no'
+          TEST_BUNDLED_GEMS_ALLOW_FAILURES: ''
+          PRECHECK_BUNDLED_GEMS: 'no'
+          SYNTAX_SUGGEST_TIMEOUT: '5'
+          YJIT_BINDGEN_DIFF_OPTS: '--exit-code'
+          LIBCLANG_PATH: ${{ matrix.libclang_path }}
+          LAUNCHABLE_STDOUT: ${{ steps.launchable.outputs.stdout_report_path }}
+          LAUNCHABLE_STDERR: ${{ steps.launchable.outputs.stderr_report_path }}
+        continue-on-error: ${{ matrix.continue-on-test_task || false }}
+
+      - name: Dump crash logs
+        if: ${{ failure() }}
+        continue-on-error: true
+        run: |
+          tail --verbose --lines=+1 rb_crash_*.txt
+          exit 1
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ${{ matrix.test_task }} ${{ matrix.configure }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+  result:
+    if: ${{ always() }}
+    name: ${{ github.workflow }} result
+    runs-on: ubuntu-latest
+    needs: [make]
+    steps:
+      - run: exit 1
+        working-directory:
+        if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
+
+defaults:
+  run:
+    working-directory: build
diff --git a/.github/workflows/zjit-macos.yml b/.github/workflows/zjit-macos.yml
new file mode 100644
index 0000000000..e68bd897fd
--- /dev/null
+++ b/.github/workflows/zjit-macos.yml
@@ -0,0 +1,239 @@
+name: ZJIT macOS
+on:
+  push:
+    branches:
+      - master
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopened
+    # Do not use paths-ignore for required status checks
+    # https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/troubleshooting-required-status-checks#handling-skipped-but-required-checks
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  make:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - test_task: 'check'
+            run_opts: '--zjit-call-threshold=1'
+            specopts: '-T --zjit-call-threshold=1'
+            configure: '--enable-zjit=dev'
+
+          - test_task: 'check'
+            run_opts: '--zjit-disable-hir-opt --zjit-call-threshold=1'
+            specopts: '-T --zjit-disable-hir-opt -T --zjit-call-threshold=1'
+            configure: '--enable-zjit=dev'
+
+          - test_task: 'zjit-check' # zjit-test + quick feedback of test_zjit.rb
+            configure: '--enable-yjit=dev --enable-zjit'
+            rust_version: "1.85.0"
+
+          - test_task: 'ruby'
+            hint: 'combo build test'
+            configure: '--enable-yjit --enable-zjit'
+
+    env:
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+      RUN_OPTS: ${{ matrix.run_opts }}
+      SPECOPTS: ${{ matrix.specopts }}
+      TESTOPTS: ${{ matrix.testopts }}
+      RUST_BACKTRACE: 1
+      ZJIT_RB_BUG: 1
+
+    runs-on: macos-26
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]' && !startsWith(github.head_ref, 'dependabot/cargo'))
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout-cone-mode: false
+          sparse-checkout: /.github
+          persist-credentials: false
+
+      - name: Install libraries
+        uses: ./.github/actions/setup/macos
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+          dummy-files: ${{ matrix.test_task == 'check' }}
+          # Set fetch-depth: 10 so that Launchable can receive commits information.
+          fetch-depth: 10
+
+      - name: Install Rust
+        if: ${{ matrix.rust_version }}
+        run: |
+          rustup install ${{ matrix.rust_version }} --profile minimal
+          rustup default ${{ matrix.rust_version }}
+
+      - uses: taiki-e/install-action@e49978b799e49ff429d162b7a30601a569ab6538 # v2.81.1
+        with:
+          tool: nextest@0.9
+        if: ${{ matrix.test_task == 'zjit-check' }}
+
+      - name: Run configure
+        run: ../src/configure -C --disable-install-doc ${{ matrix.configure }}
+
+      - run: make
+
+      - name: Verify that --zjit-dump-disasm works
+        run: |
+          ./miniruby --zjit-call-threshold=1 --zjit-dump-disasm -e0 | \
+          wc -l | \
+          ruby -ne 'raise "Disassembly seems broken in dev build (output has too few lines)" unless $_.to_i > 10'
+        if: ${{ contains(matrix.configure, 'jit=dev') }}
+
+      - name: Set ENV for ZJIT
+        run: |
+          echo "RUBY_CRASH_REPORT=$(pwd)/rb_crash_%p.txt" >> $GITHUB_ENV
+
+      - name: Set up Launchable
+        id: launchable
+        uses: ./.github/actions/launchable/setup
+        with:
+          os: macos-26
+          test-opts: ${{ matrix.configure }}
+          launchable-token: ${{ secrets.LAUNCHABLE_TOKEN }}
+          builddir: build
+          srcdir: src
+          is-zjit: true
+        continue-on-error: true
+        timeout-minutes: 3
+
+      - name: make ${{ matrix.test_task }}
+        run: |
+          test -n "${LAUNCHABLE_STDOUT}" && exec 1> >(tee "${LAUNCHABLE_STDOUT}")
+          test -n "${LAUNCHABLE_STDERR}" && exec 2> >(tee "${LAUNCHABLE_STDERR}")
+
+          set -x
+          make -s ${{ matrix.test_task }} ${TESTS:+TESTS="$TESTS"} \
+            RUN_OPTS="$RUN_OPTS" \
+            SPECOPTS="$SPECOPTS" \
+            TESTOPTS="$TESTOPTS"
+        timeout-minutes: 60
+        env:
+          RUBY_TESTOPTS: '-q --tty=no'
+          EXCLUDES: '../src/test/.excludes-zjit'
+          TEST_BUNDLED_GEMS_ALLOW_FAILURES: ''
+          SYNTAX_SUGGEST_TIMEOUT: '30'
+          PRECHECK_BUNDLED_GEMS: 'no'
+          LAUNCHABLE_STDOUT: ${{ steps.launchable.outputs.stdout_report_path }}
+          LAUNCHABLE_STDERR: ${{ steps.launchable.outputs.stderr_report_path }}
+        continue-on-error: ${{ matrix.continue-on-test_task || false }}
+
+      - name: Dump crash logs
+        if: ${{ failure() }}
+        continue-on-error: true
+        run: |
+          tail --verbose --lines=+1 rb_crash_*.txt
+          exit 1
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ${{ matrix.test_task }} ${{ matrix.configure }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+  result:
+    if: ${{ always() }}
+    name: ${{ github.workflow }} result
+    runs-on: ubuntu-latest
+    needs: [make]
+    steps:
+      - run: exit 1
+        working-directory:
+        if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
+
+  # Separated from `make` job to avoid making it a required status check for now
+  ruby-bench:
+    strategy:
+      matrix:
+        include:
+          # Test --call-threshold=2 with 2 iterations in total
+          - ruby_opts: '--zjit-call-threshold=2'
+            bench_opts: '--warmup=1 --bench=1 --excludes=shipit'
+            configure: '--enable-zjit=dev_nodebug' # --enable-zjit=dev is too slow
+
+    runs-on: macos-26
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]' && !startsWith(github.head_ref, 'dependabot/cargo'))
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - uses: ./.github/actions/setup/macos
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+
+      - name: Run configure
+        run: ../src/configure -C --disable-install-doc --prefix="$(pwd)/install" ${{ matrix.configure }}
+
+      - run: make install
+
+      # setup/directories set MAKEFLAGS=-j4 for macOS, which randomly fails sqlite3.gem builds
+      - name: Unset MAKEFLAGS
+        run: echo "MAKEFLAGS=" >> "$GITHUB_ENV"
+
+      - name: Checkout ruby-bench
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+          repository: ruby/ruby-bench
+          path: ruby-bench
+
+      # If you want to skip failing benchmark, consider using `--excludes`.
+      # e.g. `bench_opts: '--warmup=1 --bench=1 --excludes=railsbench,lobsters'`
+      - name: Run ruby-bench
+        run: ruby run_benchmarks.rb -e "zjit::../build/install/bin/ruby ${{ matrix.ruby_opts }}" ${{ matrix.bench_opts }}
+        working-directory: ruby-bench
+        env:
+          BUNDLER_VERSION: 0
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ruby-bench ${{ matrix.bench_opts }} ${{ matrix.ruby_opts }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+defaults:
+  run:
+    working-directory: build
diff --git a/.github/workflows/zjit-ubuntu.yml b/.github/workflows/zjit-ubuntu.yml
new file mode 100644
index 0000000000..8d146b7bdc
--- /dev/null
+++ b/.github/workflows/zjit-ubuntu.yml
@@ -0,0 +1,293 @@
+name: ZJIT Ubuntu
+on:
+  push:
+    branches:
+      - master
+    paths-ignore:
+      - 'doc/**'
+      - '**/man/*'
+      - '**.md'
+      - '**.rdoc'
+      - '**/.document'
+      - '.*.yml'
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopened
+    # Do not use paths-ignore for required status checks
+    # https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/troubleshooting-required-status-checks#handling-skipped-but-required-checks
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
+  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
+
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    name: cargo clippy
+
+    runs-on: ubuntu-22.04
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]' && !startsWith(github.head_ref, 'dependabot/cargo'))
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - run: cargo clippy --all-targets --all-features
+        working-directory: zjit
+
+  make:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - test_task: 'check'
+            run_opts: '--zjit-call-threshold=1'
+            specopts: '-T --zjit-call-threshold=1'
+            configure: '--enable-zjit=dev'
+
+          - test_task: 'check'
+            run_opts: '--zjit-disable-hir-opt --zjit-call-threshold=1'
+            specopts: '-T --zjit-disable-hir-opt -T --zjit-call-threshold=1'
+            configure: '--enable-zjit=dev'
+
+            # The optimizer benefits from at least 1 iteration of profiling. Also, many
+            # regression tests in bootstraptest/test_yjit.rb assume call-threshold=2.
+          - test_task: 'btest'
+            run_opts: '--zjit-call-threshold=2'
+            configure: '--enable-zjit=dev'
+
+          - test_task: 'zjit-check' # zjit-test + quick feedback of test_zjit.rb
+            configure: '--enable-yjit --enable-zjit=dev'
+            rust_version: '1.85.0'
+
+          - test_task: 'zjit-bindgen'
+            hint: 'To fix: use patch in logs'
+            # Build with YJIT+ZJIT for output that works in the most number of configurations
+            configure: '--enable-zjit=dev --enable-yjit --with-gcc=clang-16'
+            clang_path: '/usr/bin/clang-16'
+            runs-on: 'ubuntu-24.04' # for clang-16
+
+          - test_task: 'test-bundled-gems'
+            configure: '--enable-zjit=dev'
+            run_opts: '--zjit-call-threshold=1'
+
+    env:
+      GITPULLOPTIONS: --no-tags origin ${{ github.ref }}
+      RUN_OPTS: ${{ matrix.run_opts }}
+      YJIT_BENCH_OPTS: ${{ matrix.yjit_bench_opts }}
+      SPECOPTS: ${{ matrix.specopts }}
+      TESTOPTS: ${{ matrix.testopts }}
+      RUBY_DEBUG: ci
+      BUNDLE_JOBS: 8 # for yjit-bench
+      RUST_BACKTRACE: 1
+      ZJIT_RB_BUG: 1
+
+    runs-on: ${{ matrix.runs-on || 'ubuntu-22.04' }}
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]' && !startsWith(github.head_ref, 'dependabot/cargo'))
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          sparse-checkout-cone-mode: false
+          sparse-checkout: /.github
+          persist-credentials: false
+
+      - uses: ./.github/actions/setup/ubuntu
+
+      - uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        with:
+          ruby-version: '3.1'
+          bundler: none
+
+      - uses: taiki-e/install-action@e49978b799e49ff429d162b7a30601a569ab6538 # v2.81.1
+        with:
+          tool: nextest@0.9
+        if: ${{ matrix.test_task == 'zjit-check' }}
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+          dummy-files: ${{ matrix.test_task == 'check' }}
+          # Set fetch-depth: 10 so that Launchable can receive commits information.
+          fetch-depth: 10
+
+      - name: Install Rust
+        if: ${{ matrix.rust_version }}
+        run: |
+          rustup install ${{ matrix.rust_version }} --profile minimal
+          rustup default ${{ matrix.rust_version }}
+
+      - name: Install rustfmt
+        if: ${{ matrix.test_task == 'zjit-bindgen' }}
+        run: rustup component add rustfmt
+
+      - name: Run configure
+        run: ../src/configure -C --disable-install-doc --prefix=$(pwd)/install ${{ matrix.configure }}
+
+      - run: make incs
+
+      - run: make prepare-gems
+        if: ${{ matrix.test_task == 'test-bundled-gems' }}
+
+      - run: make
+
+      - name: Verify that --zjit-dump-disasm works
+        run: |
+          ./miniruby --zjit-call-threshold=1 --zjit-dump-disasm -e0 | \
+          wc -l | \
+          ruby -ne 'raise "Disassembly seems broken in dev build (output has too few lines)" unless $_.to_i > 10'
+        if: ${{ contains(matrix.configure, 'jit=dev') }}
+
+      # Check that the binary was built with ZJIT
+      - name: Check ZJIT enabled
+        run: ./miniruby --zjit -v | grep "+ZJIT"
+        if: ${{ matrix.configure != '--disable-zjit' }}
+
+      - name: Set ENV for ZJIT
+        run: |
+          echo "RUBY_CRASH_REPORT=$(pwd)/rb_crash_%p.txt" >> $GITHUB_ENV
+
+      - name: Set up Launchable
+        id: launchable
+        uses: ./.github/actions/launchable/setup
+        with:
+          os: ${{ matrix.runs-on || 'ubuntu-22.04' }}
+          test-opts: ${{ matrix.configure }}
+          launchable-token: ${{ secrets.LAUNCHABLE_TOKEN }}
+          builddir: build
+          srcdir: src
+          is-zjit: true
+        continue-on-error: true
+        timeout-minutes: 3
+
+      - name: make ${{ matrix.test_task }}
+        run: |
+          test -n "${LAUNCHABLE_STDOUT}" && exec 1> >(tee "${LAUNCHABLE_STDOUT}")
+          test -n "${LAUNCHABLE_STDERR}" && exec 2> >(tee "${LAUNCHABLE_STDERR}")
+
+          set -x
+          make -s ${{ matrix.test_task }} ${TESTS:+TESTS="$TESTS"} \
+            RUN_OPTS="$RUN_OPTS" MSPECOPT=--debug SPECOPTS="$SPECOPTS" \
+            TESTOPTS="$TESTOPTS" \
+            ZJIT_BINDGEN_DIFF_OPTS="$ZJIT_BINDGEN_DIFF_OPTS"
+        timeout-minutes: 90
+        env:
+          RUBY_TESTOPTS: '-q --tty=no'
+          EXCLUDES: '../src/test/.excludes-zjit'
+          TEST_BUNDLED_GEMS_ALLOW_FAILURES: ''
+          PRECHECK_BUNDLED_GEMS: 'no'
+          SYNTAX_SUGGEST_TIMEOUT: '30'
+          ZJIT_BINDGEN_DIFF_OPTS: '--exit-code'
+          CLANG_PATH: ${{ matrix.clang_path }}
+          LAUNCHABLE_STDOUT: ${{ steps.launchable.outputs.stdout_report_path }}
+          LAUNCHABLE_STDERR: ${{ steps.launchable.outputs.stderr_report_path }}
+        continue-on-error: ${{ matrix.continue-on-test_task || false }}
+
+      - name: Dump crash logs
+        if: ${{ failure() }}
+        continue-on-error: true
+        run: |
+          tail --verbose --lines=+1 rb_crash_*.txt
+          exit 1
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ${{ matrix.test_task }} ${{ matrix.configure }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+  result:
+    if: ${{ always() }}
+    name: ${{ github.workflow }} result
+    runs-on: ubuntu-22.04
+    needs: [make]
+    steps:
+      - name: ${{ github.workflow }} jobs have failed
+        run: exit 1
+        working-directory:
+        if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
+
+  # Separated from `make` job to avoid making it a required status check for now
+  ruby-bench:
+    strategy:
+      matrix:
+        include:
+          # Test --call-threshold=2 with 2 iterations in total
+          - ruby_opts: '--zjit-call-threshold=2'
+            bench_opts: '--warmup=1 --bench=1 --excludes=shipit'
+            configure: '--enable-zjit=dev_nodebug' # --enable-zjit=dev is too slow
+
+    runs-on: ubuntu-24.04
+
+    if: >-
+      ${{!(false
+      || contains(github.event.head_commit.message, '[DOC]')
+      || contains(github.event.pull_request.title, '[DOC]')
+      || contains(github.event.pull_request.labels.*.name, 'Documentation')
+      || (github.event.pull_request.user.login == 'dependabot[bot]' && !startsWith(github.head_ref, 'dependabot/cargo'))
+      )}}
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - uses: ./.github/actions/setup/ubuntu
+
+      - uses: ./.github/actions/setup/directories
+        with:
+          srcdir: src
+          builddir: build
+          makeup: true
+
+      - name: Run configure
+        run: ../src/configure -C --disable-install-doc --prefix="$(pwd)/install" ${{ matrix.configure }}
+
+      - run: make install
+
+      - name: Checkout ruby-bench
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          repository: ruby/ruby-bench
+          persist-credentials: false
+          path: ruby-bench
+
+      # If you want to skip failing benchmark, consider using `--excludes`.
+      # e.g. `bench_opts: '--warmup=1 --bench=1 --excludes=railsbench,lobsters'`
+      - name: Run ruby-bench
+        run: ruby run_benchmarks.rb -e "zjit::../build/install/bin/ruby ${{ matrix.ruby_opts }}" ${{ matrix.bench_opts }}
+        working-directory: ruby-bench
+        env:
+          BUNDLER_VERSION: 0
+
+      - uses: ./.github/actions/slack
+        with:
+          label: ruby-bench ${{ matrix.bench_opts }} ${{ matrix.ruby_opts }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: ${{ failure() }}
+
+defaults:
+  run:
+    working-directory: build
diff --git a/.github/zizmor.yml b/.github/zizmor.yml
new file mode 100644
index 0000000000..65b67fb6c8
--- /dev/null
+++ b/.github/zizmor.yml
@@ -0,0 +1,26 @@
+# Ignore existing findings (baseline)
+# Composite action findings are suppressed inline with # zizmor: ignore
+rules:
+  dangerous-triggers:
+    ignore:
+      - auto_request_review.yml
+      - auto_review_pr.yml
+      - labeler.yml
+      - pr-playground.yml
+  dependabot-cooldown:
+    ignore:
+      - dependabot.yml
+  misfeature:
+    ignore:
+      - mingw.yml
+      - tarball-windows.yml
+      - windows.yml
+  unpinned-images:
+    ignore:
+      - compilers.yml
+  secrets-outside-env:
+    # All committers with write access are trusted; no need for environment-scoped secrets.
+    disable: true
+  unpinned-uses:
+    ignore:
+      - wsl.yml
diff --git a/.gitignore b/.gitignore
index 36e2859c3c..7ead3a81f5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,34 +3,56 @@
 *-*-*.lib
 *.a
 *.bak
+*.bc
+*.bundle
 *.dSYM
 *.dmyh
 *.dylib
 *.elc
+*.i
+*.ii
 *.inc
 *.log
 *.o
+*.o.tmp
 *.obj
+*.old
 *.orig
+*.pch
 *.pdb
+*.rbinc
+*.rbbin
 *.rej
+*.s
 *.sav
+*.sl
+*.so
+*.so.*
 *.swp
+*.yarb
 *~
-.*-*
 .*.list
 .*.time
 .DS_Store
+.bundle
 .ccmalloc
 .ext
 .pc
 .ppack
 .svn
+.time
+.ruby-version
 Makefile
-Makefile.old
+cygruby*.def
 extconf.h
 y.output
 y.tab.c
+*.gcda
+*.gcno
+*.gcov
+*.vscode
+!misc/.vscode
+lcov*.info
 
 # /
 /*-fake.rb
@@ -40,13 +62,13 @@ y.tab.c
 /*.pc
 /*.rc
 /*_prelude.c
+/.downloaded-cache
+/.top-enc.mk
+/build*/
 /COPYING.LIB
-/ChangeLog-*
-/ChangeLog.pre-alpha
-/ChangeLog.pre1_1
+/ChangeLog
 /Doxyfile
 /GNUmakefile
-/GNUmakefile.old
 /README.atheos
 /README.fat-patch
 /README.v6
@@ -54,6 +76,7 @@ y.tab.c
 /archive
 /autom4te*.cache
 /automake
+/benchmark/benchmark-driver
 /beos
 /bmlog-*
 /breakpoints.gdb
@@ -64,6 +87,8 @@ y.tab.c
 /config.status.lineno
 /configure
 /coverage/simplecov
+/coverage/simplecov-html
+/coverage/doclie
 /coverage/.last_run.json
 /coverage/.resultset.json*
 /coverage/assets
@@ -72,9 +97,13 @@ y.tab.c
 /enc.mk
 /encdb.h
 /exts.mk
+/gc/*/exts.mk
 /goruby
 /id.[ch]
 /largefile.h
+/lcov-c-out
+/lcov-rb-out
+/lcov-out
 /lex.c
 /libruby*.*
 /miniprelude.c
@@ -90,26 +119,43 @@ y.tab.c
 /ppack
 /prelude.c
 /preview
+/probes.dmyh
 /probes.h
 /rbconfig.rb
 /rename2.h
 /repack
 /revision.h
+/revision.tmp
+/ripper.tmp.y
 /riscos
 /rubicon
 /ruby
+/ruby-runner
+/ruby-runner.h
 /ruby-man.rd.gz
+/rubyspec_temp
+/run.gdb
 /sizes.c
+/static-ruby
 /test.rb
+/test-coverage.dat
 /tmp
+/vcpkg_installed
 /transdb.h
 /uncommon.mk
 /verconf.h
 /verconf.mk
 /web
-/yasmdata.rb
+
+# /bin/
+
+/bin/*.exe
+/bin/*.dll
+/bin/goruby
+/bin/ruby
 
 # /benchmark/
+/benchmark/bm_require.data
 /benchmark/bmx_*.rb
 /benchmark/fasta.output.*
 /benchmark/wc.input
@@ -117,25 +163,38 @@ y.tab.c
 /enc/*.def
 /enc/*.exp
 /enc/*.lib
+/enc/jis/props.h
 /enc/unicode/data
 
+# /coroutine/
+!/coroutine/**/*.s
+!/coroutine/**/*.S
+
 # /enc/trans/
 /enc/trans/*.c
 /enc/trans/*.def
 /enc/trans/*.exp
 /enc/trans/*.lib
-/enc/trans/.time
+
+# /exe/
+/exe/goruby
+/exe/ruby
 
 # /ext/
 /ext/extinit.c
+/ext/configure-ext.mk
+/ext/*/exts.mk
+
+# /ext/-test-/cxxanyargs
+/ext/-test-/cxxanyargs/failure*.failed
 
 # /ext/-test-/win32/dln/
+/ext/-test-/win32/dln/dlntest.dll
 /ext/-test-/win32/dln/dlntest.exp
 /ext/-test-/win32/dln/dlntest.lib
 
-# /ext/dl/callback/
-/ext/dl/callback/callback-*.c
-/ext/dl/callback/callback.c
+# /ext/-test-/gems
+/ext/-test-/gems
 
 # /ext/etc/
 /ext/etc/constdefs.h
@@ -145,10 +204,14 @@ y.tab.c
 
 # /ext/rbconfig/
 /ext/rbconfig/sizeof/sizes.c
+/ext/rbconfig/sizeof/limits.c
 
 # /ext/ripper/
 /ext/ripper/eventids1.c
+/ext/ripper/eventids1.h
+/ext/ripper/.eventids2-check
 /ext/ripper/eventids2table.c
+/ext/ripper/ripper_init.c
 /ext/ripper/ripper.*
 /ext/ripper/ids1
 /ext/ripper/ids2
@@ -158,15 +221,20 @@ y.tab.c
 /ext/socket/constdefs.h
 /ext/socket/constdefs.c
 
-# /ext/tk/
-/ext/tk/config_list
-
 # /gems
 /gems/*.gem
+/gems/src
+/gems/*-*
+
+# /lib/
+/lib/ruby/[1-9]*.*
+/lib/ruby/vendor_ruby
+
+# /misc/
+/misc/**/__pycache__
 
-# /spec/
-/spec/mspec
-/spec/rubyspec
+# for `make test-bundler`
+/.rspec_status
 
 # /tool/
 /tool/config.guess
@@ -174,4 +242,50 @@ y.tab.c
 
 # /win32/
 /win32/*.ico
-/win32/.time
+
+
+# YJIT
+/yjit-bench
+/yjit_exit_locations.dump
+
+# Rust
+/target
+
+# /wasm/
+/wasm/tests/*.wasm
+
+# prism
+/lib/prism/compiler.rb
+/lib/prism/dispatcher.rb
+/lib/prism/dot_visitor.rb
+/lib/prism/dsl.rb
+/lib/prism/inspect_visitor.rb
+/lib/prism/mutation_compiler.rb
+/lib/prism/node.rb
+/lib/prism/reflection.rb
+/lib/prism/serialize.rb
+/lib/prism/visitor.rb
+/prism/internal/diagnostic.h
+/prism/api_node.c
+/prism/ast.h
+/prism/diagnostic.c
+/prism/json.c
+/prism/node.c
+/prism/prettyprint.c
+/prism/serialize.c
+/prism/tokens.c
+/prism/srcs.mk
+/dump_ast
+
+# prism (old file)
+/prism/token_type.c
+
+# tool/update-NEWS-gemlist.rb
+/bundled_gems.json
+/default_gems.json
+/gems/default_gems
+
+# AI agents
+/.claude
+/AGENTS.md
+/CLAUDE.md
diff --git a/.indent.pro b/.indent.pro
index 6a207a0554..1d61cbcad1 100644
--- a/.indent.pro
+++ b/.indent.pro
@@ -2,12 +2,15 @@
 -nbbb
 -nbc
 -br
+-brs
 -nbs
 -ncdb
--ce
--cli0.5
+-nce
+-cdw
+-cli2
+-cbi2
 -ndj
--ei
+-ncs
 -nfc1
 -i4
 -l120
@@ -16,6 +19,14 @@
 -psl
 -sc
 -sob
+-sbi4
+-nut
+-par
 
 -TID
 -TVALUE
+-Tst_data_t
+-Tst_index_t
+-Tst_table
+-Trb_data_type_t
+-TFILE
diff --git a/.mailmap b/.mailmap
new file mode 100644
index 0000000000..213a0f4916
--- /dev/null
+++ b/.mailmap
@@ -0,0 +1,431 @@
+git[bot]                                <svn-admin@ruby-lang.org>
+git[bot]                                <svn-admin@ruby-lang.org> git <svn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+svn[bot]                                <svn-admin@ruby-lang.org> svn <svn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# a_matsuda
+Akira Matsuda                           <ronnie@dio.jp>
+Akira Matsuda                           <ronnie@dio.jp> <a_matsuda@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# aamine
+Minero Aoki                             <aamine@loveruby.net>
+Minero Aoki                             <aamine@loveruby.net> <aamine@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# akira
+akira yamada                            <akira@ruby-lang.org>
+## akira yamada                         <akira@ruby-lang.org> <akira@rice.p.arika.org>
+akira yamada                            <akira@ruby-lang.org> <akira@arika.org>
+akira yamada                            <akira@ruby-lang.org> <akira@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# akiyoshi
+AKIYOSHI, Masamichi                     <masamichi.akiyoshi@hp.com>
+AKIYOSHI, Masamichi                     <masamichi.akiyoshi@hp.com> <akiyoshi@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# akr
+Tanaka Akira                            <akr@fsij.org>
+Tanaka Akira                            <akr@fsij.org> <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# arai
+Koji Arai                               <jca02266@nifty.ne.jp>
+Koji Arai                               <jca02266@nifty.ne.jp> <arai@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# arton
+Akio Tajima                             <artonx@yahoo.co.jp>
+Akio Tajima                             <artonx@yahoo.co.jp> <arton@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# aycabta
+aycabta                                 <aycabta@gmail.com>
+aycabta                                 <aycabta@gmail.com> <aycabta@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# ayumin
+Ayumu AIZAWA                            <ayumu.aizawa@gmail.com>
+Ayumu AIZAWA                            <ayumu.aizawa@gmail.com> <ayumin@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# azav
+Alexander Zavorine                      <alexandre.zavorine@nokia.com>
+Alexander Zavorine                      <alexandre.zavorine@nokia.com> <azav@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# charliesome
+Charlie Somerville                      <charliesome@ruby-lang.org>
+Charlie Somerville                      <charliesome@ruby-lang.org> <charliesome@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# dave
+Dave Thomas                             <dave@pragprog.com>
+Dave Thomas                             <dave@pragprog.com> <dave@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# davidflanagan
+David Flanagan                          <davidflanagan@ruby-lang.org>
+David Flanagan                          <davidflanagan@ruby-lang.org> <david@think32>
+David Flanagan                          <davidflanagan@ruby-lang.org> <david@davidflanagan.com>
+David Flanagan                          <davidflanagan@ruby-lang.org> <davidflanagan@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# dblack
+David A. Black                          <dblack@rubypal.com>
+David A. Black                          <dblack@rubypal.com> <dblack@wobblini.net>
+David A. Black                          <dblack@rubypal.com> <dblack@superlink.net>
+David A. Black                          <dblack@rubypal.com> <dblack@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# drbrain
+Eric Hodel                              <drbrain@segment7.net>
+Eric Hodel                              <drbrain@segment7.net> <drbrain@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# duerst
+Martin Dürst                            <duerst@it.aoyama.ac.jp>
+Martin Dürst                            <duerst@it.aoyama.ac.jp> <duerst@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# eban
+WATANABE Hirofumi                       <eban@ruby-lang.org>
+WATANABE Hirofumi                       <eban@ruby-lang.org> <eban@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# emboss
+Martin Bosslet                          <Martin.Bosslet@gmail.com>
+Martin Bosslet                          <Martin.Bosslet@gmail.com> <Martin.Bosslet@googlemail.com>
+Martin Bosslet                          <Martin.Bosslet@gmail.com> <emboss@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# eregon
+Benoit Daloze                           <eregontp@gmail.com>
+Benoit Daloze                           <eregontp@gmail.com> <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# evan
+Evan Phoenix                            <evan@ruby-lang.org>
+Evan Phoenix                            <evan@ruby-lang.org> <evan@fallingsnow.net>
+Evan Phoenix                            <evan@ruby-lang.org> <evan@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# glass
+Masaki Matsushita                       <glass.saga@gmail.com>
+Masaki Matsushita                       <glass.saga@gmail.com> <glass@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# gogotanaka
+Kazuki Tanaka                           <gogotanaka@ruby-lang.org>
+Kazuki Tanaka                           <gogotanaka@ruby-lang.org> <gogotanaka@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# gotoken
+Kentaro Goto                            <gotoken@gmail.com>
+Kentaro Goto                            <gotoken@gmail.com> <gotoken@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# gotoyuzo
+GOTOU Yuuzou                            <gotoyuzo@notwork.org>
+GOTOU Yuuzou                            <gotoyuzo@notwork.org> <gotoyuzo@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# gsinclair
+Gavin Sinclair                          <gsinclair@soyabean.com.au>
+Gavin Sinclair                          <gsinclair@soyabean.com.au> <gsinclair@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# H_Konishi
+KONISHI Hiromasa                        <konishih@fd6.so-net.ne.jp>
+KONISHI Hiromasa                        <konishih@fd6.so-net.ne.jp> <H_Konishi@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# headius
+Charles Oliver Nutter                   <headius@headius.com>
+Charles Oliver Nutter                   <headius@headius.com> <headius@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# hone
+Terence Lee                             <hone@heroku.com>
+Terence Lee                             <hone@heroku.com> <hone@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# hsbt
+Hiroshi SHIBATA                         <hsbt@ruby-lang.org>
+Hiroshi SHIBATA                         <hsbt@ruby-lang.org> <hsbt@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# iwamatsu
+Nobuhiro Iwamatsu                       <iwamatsu@nigauri.org>
+Nobuhiro Iwamatsu                       <iwamatsu@nigauri.org> <iwamatsu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# jeg2
+James Edward Gray II                    <james@graysoftinc.com>
+James Edward Gray II                    <james@graysoftinc.com> <jeg2@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# jim
+Jim Weirich                             <jim@tardis.local>
+Jim Weirich                             <jim@tardis.local> <jim@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# k0kubun
+Takashi Kokubun                         <takashikkbn@gmail.com>
+Takashi Kokubun                         <takashikkbn@gmail.com> <k0kubun@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# kanemoto
+Yutaka Kanemoto                         <kanemoto@ruby-lang.org>
+Yutaka Kanemoto                         <kanemoto@ruby-lang.org> <kanemoto@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# katsu
+UENO Katsuhiro                          <katsu@blue.sky.or.jp>
+UENO Katsuhiro                          <katsu@blue.sky.or.jp> <katsu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# kazu
+Kazuhiro NISHIYAMA                      <zn@mbf.nifty.com>
+Kazuhiro NISHIYAMA                      <zn@mbf.nifty.com> <kazu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# keiju
+Keiju Ishitsuka                         <keiju@ishitsuka.com>
+Keiju Ishitsuka                         <keiju@ishitsuka.com> <keiju@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# knu
+Akinori MUSHA                           <knu@iDaemons.org>
+Akinori MUSHA                           <knu@iDaemons.org> <knu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# ko1
+Koichi Sasada                           <ko1@atdot.net>
+Koichi Sasada                           <ko1@atdot.net> <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# kosaki
+KOSAKI Motohiro                         <kosaki.motohiro@gmail.com>
+KOSAKI Motohiro                         <kosaki.motohiro@gmail.com> <kosaki@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# kosako
+K.Kosako                                <sndgk393@ybb.ne.jp>
+K.Kosako                                <sndgk393@ybb.ne.jp> <kosako@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# kou
+Sutou Kouhei                            <kou@clear-code.com>
+Sutou Kouhei                            <kou@clear-code.com> <kou@cozmixng.org>
+Sutou Kouhei                            <kou@clear-code.com> <kou@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# kouji
+Kouji Takao                             <kouji.takao@gmail.com>
+Kouji Takao                             <kouji.takao@gmail.com> <kouji@takao7.net>
+Kouji Takao                             <kouji.takao@gmail.com> <kouji@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# ksaito
+Kazuo Saito                             <ksaito@uranus.dti.ne.jp>
+Kazuo Saito                             <ksaito@uranus.dti.ne.jp> <ksaito@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# ktsj
+Kazuki Tsujimoto                        <kazuki@callcc.net>
+Kazuki Tsujimoto                        <kazuki@callcc.net> <ktsj@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# luislavena
+Luis Lavena                             <luislavena@gmail.com>
+Luis Lavena                             <luislavena@gmail.com> <luislavena@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# mame
+Yusuke Endoh                            <mame@ruby-lang.org>
+## Yusuke Endoh                         <mame@ruby-lang.org> <mame@tsg.ne.jp>
+Yusuke Endoh                            <mame@ruby-lang.org> <mame@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# marcandre
+Marc-Andre Lafortune                    <github@marc-andre.ca>
+Marc-Andre Lafortune                    <ruby-core@marc-andre.ca>
+Marc-Andre Lafortune                    <ruby-core@marc-andre.ca> <marcandre@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# matz
+Yukihiro "Matz" Matsumoto               <matz@ruby.or.jp>
+Yukihiro "Matz" Matsumoto               <matz@ruby.or.jp> <matz@ruby-lang.org>
+Yukihiro "Matz" Matsumoto               <matz@ruby.or.jp> <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# michal
+Michal Rokos                            <michal@ruby-lang.org>
+Michal Rokos                            <michal@ruby-lang.org> <michal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# mneumann
+Michael Neumann                         <mneumann@ruby-lang.org>
+Michael Neumann                         <mneumann@ruby-lang.org> <mneumann@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# mrkn
+Kenta Murata                            <mrkn@mrkn.jp>
+Kenta Murata                            <mrkn@mrkn.jp> <muraken@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+Kenta Murata                            <mrkn@mrkn.jp> <3959+mrkn@users.noreply.github.com>
+Kenta Murata                            <mrkn@mrkn.jp> <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# nagachika
+nagachika                               <nagachika@ruby-lang.org>
+nagachika                               <nagachika@ruby-lang.org> <nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# nagai
+Hidetoshi NAGAI                         <nagai@ai.kyutech.ac.jp>
+Hidetoshi NAGAI                         <nagai@ai.kyutech.ac.jp> <nagai@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# nahi
+Hiroshi Nakamura                        <nahi@ruby-lang.org>
+Hiroshi Nakamura                        <nahi@ruby-lang.org> <nahi@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# nari
+Narihiro Nakamura                       <authornari@gmail.com>
+Narihiro Nakamura                       <authornari@gmail.com> <nari@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# naruse
+NARUSE, Yui                             <naruse@airemix.jp>
+NARUSE, Yui                             <naruse@airemix.jp> <naruse@ruby-lang.org>
+NARUSE, Yui                             <naruse@airemix.jp> <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# ngoto
+Naohisa Goto                            <ngotogenome@gmail.com>
+Naohisa Goto                            <ngotogenome@gmail.com> <ngoto@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# nobu
+Nobuyoshi Nakada                        <nobu@ruby-lang.org>
+Nobuyoshi Nakada                        <nobu@ruby-lang.org> <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# normal
+Eric Wong                               <normal@ruby-lang.org>
+Eric Wong                               <normal@ruby-lang.org> <e@80x24.org>
+Eric Wong                               <normal@ruby-lang.org> <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# ntalbott
+Nathaniel Talbott                       <ntalbott@ruby-lang.org>
+Nathaniel Talbott                       <ntalbott@ruby-lang.org> <ntalbott@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# ocean
+Hirokazu Yamamoto                       <ocean@m2.ccsnet.ne.jp>
+Hirokazu Yamamoto                       <ocean@m2.ccsnet.ne.jp> <ocean@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# odaira
+Rei Odaira                              <rodaira@us.ibm.com>
+Rei Odaira                              <rodaira@us.ibm.com> <Rei.Odaira@gmail.com>
+Rei Odaira                              <rodaira@us.ibm.com> <odaira@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# okkez
+okkez                                   <okkez000@gmail.com>
+okkez                                   <okkez000@gmail.com> <okkez@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# rhe
+Kazuki Yamaguchi                        <k@rhe.jp>
+Kazuki Yamaguchi                        <k@rhe.jp> <rhe@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# ryan
+Ryan Davis                              <ryand-github@zenspider.com>
+Ryan Davis                              <ryand-github@zenspider.com> <ryand-ruby@zenspider.com>
+Ryan Davis                              <ryand-github@zenspider.com> <ryan@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# samuel
+Samuel Williams                         <samuel.williams@oriontransfer.co.nz>
+Samuel Williams                         <samuel.williams@oriontransfer.co.nz> <samuel@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# seki
+Masatoshi SEKI                          <m_seki@mva.biglobe.ne.jp>
+Masatoshi SEKI                          <m_seki@mva.biglobe.ne.jp> <seki@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# ser
+Sean Russell                            <ser@germane-software.com>
+Sean Russell                            <ser@germane-software.com> <ser@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# shigek
+Shigeo Kobayashi                        <shigek@ruby-lang.org>
+Shigeo Kobayashi                        <shigek@ruby-lang.org> <shigek@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# shirosaki
+Hiroshi Shirosaki                       <h.shirosaki@gmail.com>
+Hiroshi Shirosaki                       <h.shirosaki@gmail.com> <shirosaki@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# sho-h
+Sho Hashimoto                           <sho-h@ruby-lang.org>
+Sho Hashimoto                           <sho-h@ruby-lang.org> <sho-h@netlab.jp>
+Sho Hashimoto                           <sho-h@ruby-lang.org> <sho.hsmt@gmail.com>
+Sho Hashimoto                           <sho-h@ruby-lang.org> <sho-h@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# shugo
+Shugo Maeda                             <shugo@ruby-lang.org>
+Shugo Maeda                             <shugo@ruby-lang.org> <shugo@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# shyouhei
+卜部昌平                                    <shyouhei@ruby-lang.org>
+卜部昌平                                    <shyouhei@ruby-lang.org> <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# siena
+Siena.                                  <siena@faculty.chiba-u.jp>
+Siena.                                  <siena@faculty.chiba-u.jp> <siena@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# sonots
+sonots                                  <sonots@gmail.com>
+sonots                                  <sonots@gmail.com> <sonots@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# sorah
+Sorah Fukumori                          <her@sorah.jp>
+Sorah Fukumori                          <her@sorah.jp> <sorah@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# stomar
+Marcus Stollsteimer                     <sto.mar@web.de>
+Marcus Stollsteimer                     <sto.mar@web.de> <stomar@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# suke
+Masaki Suketa                           <masaki.suketa@nifty.ne.jp>
+Masaki Suketa                           <masaki.suketa@nifty.ne.jp> <suke@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# tadd
+Tadashi Saito                           <tad.a.digger@gmail.com>
+Tadashi Saito                           <tad.a.digger@gmail.com> <tadd@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# tadf
+Tadayoshi Funaba                        <tadf@dotrb.org>
+Tadayoshi Funaba                        <tadf@dotrb.org> <tadf@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# takano32
+TAKANO Mitsuhiro                        <takano32@gmail.com>
+TAKANO Mitsuhiro                        <takano32@gmail.com> <takano32@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# tarui
+Masaya Tarui                            <tarui@ruby-lang.org>
+Masaya Tarui                            <tarui@ruby-lang.org> <tarui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# technorama
+Technorama Ltd.                         <oss-ruby@technorama.net>
+Technorama Ltd.                         <oss-ruby@technorama.net> <technorama@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# tenderlove
+Aaron Patterson                         <tenderlove@ruby-lang.org>
+Aaron Patterson                         <tenderlove@ruby-lang.org> <tenderlove@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# tmm1
+Aman Gupta                              <ruby@tmm1.net>
+Aman Gupta                              <ruby@tmm1.net> <tmm1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# ts
+Guy Decoux                              <ts@moulon.inra.fr>
+Guy Decoux                              <ts@moulon.inra.fr> <ts@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# ttate
+Takaaki Tateishi                        <ttate@ttsky.net>
+## Takaaki Tateishi                     <ttate@ttsky.net> <ttate@kt.jaist.ac.jp>
+Takaaki Tateishi                        <ttate@ttsky.net> <ttate@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# uema2
+Takaaki Uematsu                         <uema2x@jcom.home.ne.jp>
+Takaaki Uematsu                         <uema2x@jcom.home.ne.jp> <uema2@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# usa
+U.Nakamura                              <usa@ruby-lang.org>
+U.Nakamura                              <usa@ruby-lang.org> <usa@garbagecollect.jp>
+U.Nakamura                              <usa@ruby-lang.org> <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# wakou
+Wakou Aoyama                            <wakou@ruby-lang.org>
+Wakou Aoyama                            <wakou@ruby-lang.org> <wakou@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# wanabe
+wanabe                                  <s.wanabe@gmail.com>
+wanabe                                  <s.wanabe@gmail.com> <wanabe@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# watson1978
+Watson                                  <watson1978@gmail.com>
+Watson                                  <watson1978@gmail.com> <watson1978@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# wew
+William Webber                          <william@williamwebber.com>
+William Webber                          <william@williamwebber.com> <wew@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# why
+why the lucky stiff                     <why@ruby-lang.org>
+why the lucky stiff                     <why@ruby-lang.org> <why@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# xibbar
+Takeyuki FUJIOKA                        <xibbar@ruby-lang.org>
+Takeyuki FUJIOKA                        <xibbar@ruby-lang.org> <xibbar@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# yugui
+Yuki Yugui Sonoda                       <yugui@yugui.jp>
+Yuki Yugui Sonoda                       <yugui@yugui.jp> <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# yui-knk
+yui-knk                                 <spiketeika@gmail.com>
+yui-knk                                 <spiketeika@gmail.com> <yui-knk@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# yuki
+Yuki Nishijima                          <yuki24@hey.com>
+Yuki Nishijima                          <yuki24@hey.com> <mail@yukinishijima.net>
+Yuki Nishijima                          <yuki24@hey.com> <yuki@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# zsombor
+Dee Zsombor                             <zsombor@ruby-lang.org>
+Dee Zsombor                             <zsombor@ruby-lang.org> <zsombor@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+
+# zzak
+zzak                                    <zzakscott@gmail.com>
+zzak                                    <zzakscott@gmail.com> <zzak@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
diff --git a/.rdoc_options b/.rdoc_options
new file mode 100644
index 0000000000..5172911e16
--- /dev/null
+++ b/.rdoc_options
@@ -0,0 +1,37 @@
+---
+page_dir: doc
+main_page: index.md
+title: Documentation for Ruby development version
+visibility: :private
+rdoc_include:
+- doc
+
+exclude:
+- \.gemspec\z
+- lib/set/subclass_compatible.rb
+
+autolink_excluded_words:
+- Box
+- Class
+- Method
+- Module
+- Process
+- RDoc
+- Ruby
+- Set
+- ZJIT
+- YJIT
+
+canonical_root: https://docs.ruby-lang.org/en/master
+
+footer_content:
+  Ruby:
+    Documentation: index.html
+    Official Website: https://www.ruby-lang.org/
+    Playground: https://ruby.github.io/play-ruby/
+  Resources:
+    GitHub: https://github.com/ruby/ruby
+    Issue Tracker: https://bugs.ruby-lang.org/projects/ruby-master/issues
+    RubyGems: https://rubygems.org/
+  Community:
+    X: https://x.com/rubylangorg
diff --git a/.rspec_parallel b/.rspec_parallel
new file mode 100644
index 0000000000..aaff198a32
--- /dev/null
+++ b/.rspec_parallel
@@ -0,0 +1,2 @@
+--format progress
+--format ParallelTests::RSpec::RuntimeLogger --out tmp/parallel_runtime_rspec.log
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 992f40fa10..0000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,111 +0,0 @@
-# Copyright (C) 2011 Urabe, Shyouhei.  All rights reserved.
-#
-# This file is  a part of the programming language  Ruby.  Permission is hereby
-# granted,  to either  redistribute  or  modify this  file,  provided that  the
-# conditions  mentioned in  the file  COPYING are  met.  Consult  the  file for
-# details.
-
-# This is  a Travis-CI  build configuration file.   The list  of configurations
-# available is located in
-#
-#     http://about.travis-ci.org/docs/user/build-configuration/
-#
-# and as Ruby itself is a project written in C language,
-#
-#     http://about.travis-ci.org/docs/user/languages/c/
-#
-# is also a good place to look at.
-
-# Language specification.
-language: c
-
-# Compilers.  Several  compilers are  provided in Travis,  so we try  them all.
-# The value set here is visible via $CC environment variable.
-compiler:
-  - gcc
-  - clang
-
-os:
-  - linux
-  - osx
-
-# Dependencies.  Some  header files are missing  in a Travis' worker  VM, so we
-# have  to install  them.  The  "1.9.1" here  is OK.   It is  the  most adopted
-# version string  for Debian/Ubuntu, and  no dependencies have been  changed so
-# far since the 1.9.1 release.
-before_install:
-  - "CONFIG_FLAG="
-  - "if [[ $TRAVIS_OS_NAME = 'linux' ]]; then sudo apt-get -qq update; fi"
-  - "if [[ $TRAVIS_OS_NAME = 'linux' ]]; then sudo apt-get -qq install $CC; fi" # upgrade if any
-  - "if [[ $TRAVIS_OS_NAME = 'linux' ]]; then JOBS='-j'; fi"
-  - "if [[ $TRAVIS_OS_NAME = 'osx' ]]; then brew install autoconf gdbm openssl; fi"
-  - "if [[ $TRAVIS_OS_NAME = 'osx' ]]; then CONFIG_FLAG=\"$CONFIG_FLAG --with-gdbm-dir=`brew --prefix gdbm`\"; fi"
-  - "if [[ $TRAVIS_OS_NAME = 'osx' ]]; then CONFIG_FLAG=\"$CONFIG_FLAG --with-openssl-dir=`brew --prefix openssl`\"; fi"
-  - "if [[ $TRAVIS_OS_NAME = 'osx' && $CC = 'gcc' ]]; then CC='gcc-4.9'; fi"
-install: "if [[ $TRAVIS_OS_NAME = 'linux' ]]; then sudo apt-get -qq build-dep ruby1.9.1 2>/dev/null; fi"
-
-# Script is where the test runs.  Note  we just do "make test", not other tests
-# like  test-all, test-rubyspec.   This is  because  they take  too much  time,
-# enough for Travis to shut down the VM as being stalled.
-before_script:
-  - "if [[ $TRAVIS_OS_NAME = 'osx' ]]; then rm -f ~/Library/Logs/DiagnosticReports/ruby_*.crash; fi"
-  - "uname -a"
-  - "uname -r"
-  - "rm -fr .ext autom4te.cache"
-  - "make -f common.mk BASERUBY=ruby MAKEDIRS='mkdir -p' srcdir=. update-config_files"
-  - "autoconf"
-  - "mkdir config_1st config_2nd"
-  - "./configure -C --disable-install-doc --with-gcc=$CC $CONFIG_FLAG"
-  - "cp -pr config.status .ext/include config_1st"
-  - "make reconfig"
-  - "cp -pr config.status .ext/include config_2nd"
-  - "diff -ru config_1st config_2nd"
-  - "make -s $JOBS encs"
-  - "make -s $JOBS exts"
-  - "make update-rubyspec"
-  - "if [[ $TRAVIS_OS_NAME = 'osx' ]]; then echo 'exclude :test_deadlock_by_signal_at_forking, \"under investigation\"' >> test/excludes/TestProcess.rb; fi"
-script:
-  - "make test"
-  - "make test-all TESTOPTS='-q -j2'"
-  - "make test-rubyspec"
-after_failure:
-  - "if [[ $TRAVIS_OS_NAME = 'osx' ]]; then find ~/Library/Logs/DiagnosticReports -type f -name ruby_\\*.crash -ls -execdir cat {} \\; -delete; fi"
-
-# Branch matrix.  Not all branches are Travis-ready so we limit branches here.
-branches:
-  only:
-    - trunk
-    - ruby_2_0_0
-    - ruby_2_1
-    - ruby_2_2
-
-# We want to be notified when something happens.
-notifications:
-  irc:
-    channels:
-      - "irc.freenode.org#ruby-core"
-      - "irc.freenode.org#ruby-ja"
-    on_success: change # [always|never|change] # default: always
-    on_failure: change # [always|never|change] # default: always
-    template:
-      - "%{message} by @%{author}: See %{build_url}"
-
-  # Update ruby-head installed on Travis CI so other projects can test against it.
-  webhooks:
-    urls:
-      - "https://rubies.travis-ci.org/rebuild/ruby-head"
-    on_success: always
-    on_failure: never
-
-  email:
-    - ko1c-failure@atdot.net
-    - shibata.hiroshi@gmail.com
-
-# Local Variables:
-# mode: YAML
-# coding: utf-8-unix
-# indent-tabs-mode: nil
-# tab-width: 4
-# fill-column: 79
-# default-justification: full
-# End:
diff --git a/BSDL b/BSDL
index a009caefea..66d93598aa 100644
--- a/BSDL
+++ b/BSDL
@@ -4,10 +4,10 @@ Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 1. Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
+   notice, this list of conditions and the following disclaimer.
 2. Redistributions in binary form must reproduce the above copyright
-notice, this list of conditions and the following disclaimer in the
-documentation and/or other materials provided with the distribution.
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
 
 THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ffdf2dd4b8..35e79dd3b9 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,4 +1 @@
-Please see the [official issue tracker] and wiki [HowToContribute].
-
-[official issue tracker]: https://bugs.ruby-lang.org
-[HowToContribute]: https://bugs.ruby-lang.org/projects/ruby/wiki/HowToContribute
+See ["Contributing to Ruby"](https://docs.ruby-lang.org/en/master/contributing/contributing_md.html), which includes setup and build instructions.
diff --git a/COPYING b/COPYING
index a1f19ff99d..428ce03ed7 100644
--- a/COPYING
+++ b/COPYING
@@ -1,56 +1,58 @@
+{日本語}[rdoc-ref:COPYING.ja]
+
 Ruby is copyrighted free software by Yukihiro Matsumoto <matz@netlab.jp>.
 You can redistribute it and/or modify it under either the terms of the
 2-clause BSDL (see the file BSDL), or the conditions below:
 
-  1. You may make and give away verbatim copies of the source form of the
-     software without restriction, provided that you duplicate all of the
-     original copyright notices and associated disclaimers.
+1. You may make and give away verbatim copies of the source form of the
+   software without restriction, provided that you duplicate all of the
+   original copyright notices and associated disclaimers.
 
-  2. You may modify your copy of the software in any way, provided that
-     you do at least ONE of the following:
+2. You may modify your copy of the software in any way, provided that
+   you do at least ONE of the following:
 
-       a) place your modifications in the Public Domain or otherwise
-          make them Freely Available, such as by posting said
-	  modifications to Usenet or an equivalent medium, or by allowing
-	  the author to include your modifications in the software.
+   a. place your modifications in the Public Domain or otherwise
+      make them Freely Available, such as by posting said
+      modifications to Usenet or an equivalent medium, or by allowing
+      the author to include your modifications in the software.
 
-       b) use the modified software only within your corporation or
-          organization.
+   b. use the modified software only within your corporation or
+      organization.
 
-       c) give non-standard binaries non-standard names, with
-          instructions on where to get the original software distribution.
+   c. give non-standard binaries non-standard names, with
+      instructions on where to get the original software distribution.
 
-       d) make other distribution arrangements with the author.
+   d. make other distribution arrangements with the author.
 
-  3. You may distribute the software in object code or binary form,
-     provided that you do at least ONE of the following:
+3. You may distribute the software in object code or binary form,
+   provided that you do at least ONE of the following:
 
-       a) distribute the binaries and library files of the software,
-	  together with instructions (in the manual page or equivalent)
-	  on where to get the original distribution.
+   a. distribute the binaries and library files of the software,
+      together with instructions (in the manual page or equivalent)
+      on where to get the original distribution.
 
-       b) accompany the distribution with the machine-readable source of
-	  the software.
+   b. accompany the distribution with the machine-readable source of
+      the software.
 
-       c) give non-standard binaries non-standard names, with
-          instructions on where to get the original software distribution.
+   c. give non-standard binaries non-standard names, with
+      instructions on where to get the original software distribution.
 
-       d) make other distribution arrangements with the author.
+   d. make other distribution arrangements with the author.
 
-  4. You may modify and include the part of the software into any other
-     software (possibly commercial).  But some files in the distribution
-     are not written by the author, so that they are not under these terms.
+4. You may modify and include the part of the software into any other
+   software (possibly commercial).  But some files in the distribution
+   are not written by the author, so that they are not under these terms.
 
-     For the list of those files and their copying conditions, see the
-     file LEGAL.
+   For the list of those files and their copying conditions, see the
+   file LEGAL.
 
-  5. The scripts and library files supplied as input to or produced as 
-     output from the software do not automatically fall under the
-     copyright of the software, but belong to whomever generated them, 
-     and may be sold commercially, and may be aggregated with this
-     software.
+5. The scripts and library files supplied as input to or produced as
+   output from the software do not automatically fall under the
+   copyright of the software, but belong to whomever generated them,
+   and may be sold commercially, and may be aggregated with this
+   software.
 
-  6. THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
-     IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
-     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-     PURPOSE.
+6. THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
+   IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+   PURPOSE.
diff --git a/COPYING.ja b/COPYING.ja
index e50d01c8d1..5de2dbcc8f 100644
--- a/COPYING.ja
+++ b/COPYING.ja
@@ -1,51 +1,53 @@
+{English}[rdoc-ref:COPYING]
+
 本プログラムはフリーソフトウェアです．2-clause BSDL
 または以下に示す条件で本プログラムを再配布できます
 2-clause BSDLについてはBSDLファイルを参照して下さい．
 
-  1. 複製は制限なく自由です．
+1. 複製は制限なく自由です．
 
-  2. 以下の条件のいずれかを満たす時に本プログラムのソースを
-     自由に変更できます．
+2. 以下の条件のいずれかを満たす時に本プログラムのソースを
+   自由に変更できます．
 
-     (a) ネットニューズにポストしたり，作者に変更を送付する
-         などの方法で，変更を公開する．
+   a.  ネットニューズにポストしたり，作者に変更を送付する
+       などの方法で，変更を公開する．
 
-     (b) 変更した本プログラムを自分の所属する組織内部だけで
-         使う．
+   b.  変更した本プログラムを自分の所属する組織内部だけで
+       使う．
 
-     (c) 変更点を明示したうえ，ソフトウェアの名前を変更する．
-         そのソフトウェアを配布する時には変更前の本プログラ
-         ムも同時に配布する．または変更前の本プログラムのソー
-         スの入手法を明示する．
+   c.  変更点を明示したうえ，ソフトウェアの名前を変更する．
+       そのソフトウェアを配布する時には変更前の本プログラ
+       ムも同時に配布する．または変更前の本プログラムのソー
+       スの入手法を明示する．
 
-     (d) その他の変更条件を作者と合意する．
+   d.  その他の変更条件を作者と合意する．
 
-  3. 以下の条件のいずれかを満たす時に本プログラムをコンパイ
-     ルしたオブジェクトコードや実行形式でも配布できます．
+3. 以下の条件のいずれかを満たす時に本プログラムをコンパイ
+   ルしたオブジェクトコードや実行形式でも配布できます．
 
-     (a) バイナリを受け取った人がソースを入手できるように，
-         ソースの入手法を明示する．
+   a.  バイナリを受け取った人がソースを入手できるように，
+       ソースの入手法を明示する．
 
-     (b) 機械可読なソースコードを添付する．
+   b.  機械可読なソースコードを添付する．
 
-     (c) 変更を行ったバイナリは名前を変更したうえ，オリジナ
-         ルのソースコードの入手法を明示する．
+   c.  変更を行ったバイナリは名前を変更したうえ，オリジナ
+       ルのソースコードの入手法を明示する．
 
-     (d) その他の配布条件を作者と合意する．
+   d.  その他の配布条件を作者と合意する．
 
-  4. 他のプログラムへの引用はいかなる目的であれ自由です．た
-     だし，本プログラムに含まれる他の作者によるコードは，そ
-     れぞれの作者の意向による制限が加えられる場合があります．
+4. 他のプログラムへの引用はいかなる目的であれ自由です．た
+   だし，本プログラムに含まれる他の作者によるコードは，そ
+   れぞれの作者の意向による制限が加えられる場合があります．
 
-     それらファイルの一覧とそれぞれの配布条件などに付いては
-     LEGALファイルを参照してください．
+   それらファイルの一覧とそれぞれの配布条件などに付いては
+   LEGALファイルを参照してください．
 
-  5. 本プログラムへの入力となるスクリプトおよび，本プログラ
-     ムからの出力の権利は本プログラムの作者ではなく，それぞ
-     れの入出力を生成した人に属します．また，本プログラムに
-     組み込まれるための拡張ライブラリについても同様です．
+5. 本プログラムへの入力となるスクリプトおよび，本プログラ
+   ムからの出力の権利は本プログラムの作者ではなく，それぞ
+   れの入出力を生成した人に属します．また，本プログラムに
+   組み込まれるための拡張ライブラリについても同様です．
 
-  6. 本プログラムは無保証です．作者は本プログラムをサポート
-     する意志はありますが，プログラム自身のバグあるいは本プ
-     ログラムの実行などから発生するいかなる損害に対しても責
-     任を持ちません．
+6. 本プログラムは無保証です．作者は本プログラムをサポート
+   する意志はありますが，プログラム自身のバグあるいは本プ
+   ログラムの実行などから発生するいかなる損害に対しても責
+   任を持ちません．
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000000..2108276e72
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,766 @@
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000000..33010e65fb
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,64 @@
+# This is the root Cargo [workspace](https://doc.rust-lang.org/cargo/reference/workspaces.html)
+# and the root package for all the rust code that are statically linked into ruby. Rust tooling
+# limitations means all Rust code need to share a single archive library (staticlib) at the
+# integration point with non-rust code. (See rustlang/rust#44322 and #104707 for a taste of
+# the linking challenges.)
+#
+# Do not add required dependencies. This is a policy that helps downstream consumers and give
+# us tight control over what we ship. All of the optional dependencies are used exclusively
+# during development.
+#
+# Release builds avoid Cargo entirely because offline builds can fail even when none of the
+# optional dependencies are built (rust-lang/cargo#10352).
+
+[workspace]
+members = ["zjit", "yjit", "jit"]
+
+[package]
+name = "ruby"
+version = "0.0.0"
+edition = "2024"
+rust-version = "1.85.0"
+publish = false # Don't publish to crates.io
+
+[dependencies]
+yjit = { path = "yjit", optional = true }
+zjit = { path = "zjit", optional = true }
+
+[lib]
+crate-type = ["staticlib"]
+path = "ruby.rs"
+
+[features]
+disasm = ["yjit?/disasm", "zjit?/disasm"]
+runtime_checks = ["yjit?/runtime_checks", "zjit?/runtime_checks"]
+yjit = [ "dep:yjit" ]
+zjit = [ "dep:zjit" ]
+
+[profile.dev]
+opt-level = 1 # On 0, functions use so much stack space that we get stray `SystemStackError`s
+debug = true
+debug-assertions = true
+overflow-checks = true
+
+[profile.test]
+inherits = "dev"
+opt-level = 0
+
+[profile.dev_nodebug]
+inherits = "dev"
+
+[profile.stats]
+inherits = "release"
+
+[profile.release]
+# NOTE: --enable-yjit and zjit builds use `rustc` without going through Cargo. You
+# might want to update the `rustc` invocation if you change this profile.
+opt-level = 3
+# The extra robustness that comes from checking for arithmetic overflow is
+# worth the performance cost for the compiler.
+overflow-checks = true
+# Generate debug info
+debug = true
+# Use ThinLTO. Much smaller output for a small amount of build time increase.
+lto = "thin"
diff --git a/ChangeLog b/ChangeLog
deleted file mode 100644
index 1699f64293..0000000000
--- a/ChangeLog
+++ /dev/null
@@ -1,5421 +0,0 @@
-Wed Jul  1 10:54:56 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* Add test for Enumerable#none? [fix GH-950] Patch by @yui-knk
-
-Wed Jul  1 09:30:36 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* struct.c (struct_set_members): hide internal back_members
-	  object, and members object does not need to be duped as it
-	  should be frozen and hidden.
-
-Wed Jul  1 09:28:47 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* struct.c (struct_member_pos): revert r51080 to fix other
-	  implicit conversions but cast the return value to fix the
-	  previous implicit conversion.
-
-Wed Jul  1 08:47:24 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* struct.c (struct_member_pos): avoid implicit conversion loses
-	  integer precision: 'long' to 'int'.
-
-Wed Jul  1 05:57:03 2015  Eric Wong  <e@80x24.org>
-
-	* vm_method.c (rb_add_method_iseq): add RB_GC_GUARD
-	* class.c (clone_method): remove RB_GC_GUARD
-	* struct.c (define_aref_method): ditto
-	  (define_aset_method): ditto
-	* vm.c (vm_define_method):
-	* iseq.c (rb_iseq_clone): add RB_GC_GUARD
-
-Wed Jul  1 05:43:58 2015  Eric Wong  <e@80x24.org>
-
-	* struct.c (AREF_HASH_THRESHOLD): new macro
-	  (id_back_members): new ID
-	  (struct_member_pos_ideal): new function
-	  (struct_member_pos_probe): ditto
-	  (struct_set_members): ditto
-	  (struct_member_pos): ditto
-	  (rb_struct_getmember): use struct_member_pos for O(1) access
-	  (rb_struct_aref_sym): ditto
-	  (rb_struct_aset_sym): ditto
-	  (setup_struct): call struct_set_members
-	  (struct_define_without_accessor): ditto
-	  (Init_Struct): initialize __members_back__
-	  [ruby-core:66851] [ruby-core:69705] [ruby-core:69821]
-
-Tue Jun 30 23:12:08 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* io.c (rb_io_reopen): FilePathValue() ensures the path
-	  NUL-terminated and frozen, so it is unnecessary to make it shared.
-
-Tue Jun 30 23:11:53 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (check_dirname): ensure path name NUL-terminated for
-	  SHARABLE_MIDDLE_SUBSTRING.
-
-	* io.c (rb_sysopen): ditto.
-
-Tue Jun 30 18:38:16 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* win32/file.c (rb_freopen): need to terminate by NUL.
-
-Tue Jun 30 17:28:25 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* io.c (rb_io_reopen): freopen(3) with OS encoding path.
-	  [ruby-core:69780] [Bug #11320]
-
-	* win32/file.c (rb_freopen): wrapper of wchar version freopen(3).
-	  use _wfreopen_s() if available.
-
-Tue Jun 30 08:24:08 2015  Eric Wong  <e@80x24.org>
-
-	* io.c (rb_io_oflags_modestr): handle O_TRUNC correctly
-	* test/ruby/test_io.rb (test_reopen_stdio): new test
-	  Patch-by: cremno phobia <cremno@mail.ru>
-	  [ruby-core:69779] [Bug #11319]
-
-Tue Jun 30 02:47:02 2015  Eric Wong  <e@80x24.org>
-
-	* include/ruby/st.h (struct st_table): hide struct list_head
-	* st.c (struct st_table_entry): adjust struct
-	  (head, tail): remove shortcut macros
-	  (st_head): new wrapper function
-	  (st_init_table_with_size): adjust to new struct and API
-	  (st_clear): ditto
-	  (add_direct): ditto
-	  (unpack_entries): ditto
-	  (rehash): ditto
-	  (st_copy): ditto
-	  (remove_entry): ditto
-	  (st_shift): ditto
-	  (st_foreach_check): ditto
-	  (st_foreach): ditto
-	  (get_keys): ditto
-	  (get_values): ditto
-	  (st_values_check): ditto
-	  (st_reverse_foreach_check): ditto (unused)
-	  (st_reverse_foreach): ditto (unused)
-	  [ruby-core:69726] [Misc #10278]
-
-Mon Jun 29 17:38:01 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* insns.def (defineclass): do not quote unprintable characters at
-	  raising an exception.
-
-Mon Jun 29 16:01:24 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* lib/net/http/response.rb (inflater): CONTENT_ENCODING can be upper
-	  case. [ruby-core:69670] [Bug #11285] patched by Andy Chu
-
-Mon Jun 29 14:50:08 2015  Shugo Maeda  <shugo@ruby-lang.org>
-
-	* eval.c (add_activated_refinement): should not include the original
-	  class.
-
-Mon Jun 29 12:09:10 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* README.md: tweak styles. [fix GH-945][ci skip] Patch by @bryndyment
-
-Mon Jun 29 07:23:55 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* template/sizes.c.tmpl: extract RUBY_DEFINT to define sizes of
-	  types checked by configure.in, and fix size of intptr_t in
-	  universal binary.
-
-Mon Jun 29 02:10:10 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* insns.def (defineclass): preserve encoding of name in error
-	  messages for super class mismatch.
-
-	* insns.def (defineclass): preserve encoding of name in error
-	  messages for non-class super.
-
-	* insns.def (defineclass): preserve encoding of name in error
-	  messages when already defined but type mismatch.
-
-Sun Jun 28 12:07:35 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* class.c (rb_define_class_id_under): raise TypeError exception
-	  same as ruby level class definition when superclass mismatch.
-
-Sun Jun 14 19:02:03 2015  Benoit Daloze  <eregontp@gmail.com>
-
-	* lib/net/ftp.rb (makeport): close the TCPServer
-	  when sending the port fails.
-
-	* test/net/ftp/test_ftp.rb: test for above.
-
-Fri Jun 26 12:48:37 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* transcode.c (load_transcoder_entry): fix transcoder loading race
-	  condition, by waiting in require.  [ruby-dev:49106] [Bug #11277]
-
-Fri Jun 26 07:53:56 2015  Eric Wong  <e@80x24.org>
-
-	* enum.c (enum_minmax): simplify return value creation
-	* test/ruby/test_enum.rb: test behavior on empty
-	* hash.c (rb_hash_fetch_m): remove unnecessary volatile since r41597
-	  (env_reject_bang): trade volatile for GC guard
-	  (env_select): ditto
-	  (env_select_bang): ditto
-	  (env_keep_if): ditto
-	  (rb_env_clear): ditto
-
-Thu Jun 25 21:24:28 2015  Naohisa Goto  <ngotogenome@gmail.com>
-
-	* test/-ext-/popen_deadlock/test_popen_deadlock.rb: test [Bug #11265]
-
-	* ext/-test-/popen_deadlock/infinite_loop_dlsym.c: new ext to call
-	  dlsym(3) infinitely without GVL, used in the above test.
-
-	* ext/-test-/popen_deadlock/extconf.rb: extconf.rb for the above
-	  ext. Currently, only enabled on Solaris (main target) and Linux
-	  (as a reference platform and for debugging the ext).
-
-Thu Jun 25 19:24:25 2015  Naohisa Goto  <ngotogenome@gmail.com>
-
-	* configure.in: not to use vfork on Solaris to avoid deadlock
-	  occurred in vfork(2) with multi-threading and dynamic linker
-	  on Solaris. [Bug #11265] [ruby-dev:49089]
-
-Thu Jun 25 18:25:41 2015  Naohisa Goto  <ngotogenome@gmail.com>
-
-	* test/lib/envutil.rb (Test::Unit::Assertions#assert_no_memory_leak):
-	  NO_MEMORY_LEAK_ENVS is moved to Memory::NO_MEMORY_LEAK_ENVS
-	  to reduce child executions during test-all on Solaris.
-
-	* test/lib/memory_status.rb (Memory::NO_MEMORY_LEAK_ENVS): ditto.
-
-Thu Jun 25 17:32:33 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_method.c (rb_method_entry_create): need to call
-	  method_definition_reset() if def is given.
-
-	  Actually, `me' is a new object, so we don't need to call it.
-	  It is just to make sure.
-
-	* vm_method.c (method_definition_reset): remove duplicated insertion.
-
-	* vm_method.c (rb_method_entry_clone): assign dst->def here,
-	  not in method_definition_reset().
-
-Thu Jun 25 16:44:54 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_method.c: make a rb_method_definition_t data (def) *after* making
-	  a rb_method_entry_t data (me).
-
-	  Normally, `me' points `def'. Some Ruby objects pointed from `def'
-	  and objects are marked by `me' (mark_method_entry() in gc.c).
-	  However, `def' is built before making a `me', then nobody can mark
-	  objects pointed from `def' before making (and pointing from) `me'.
-
-	  I hope this patch solve #11244.
-
-	* vm_method.c: remove `rb_' prefix from some static functions.
-
-	* method.h (rb_method_entry_create): constify
-
-	* gc.c (mark_method_entry): add checking `def' and
-	  `def->body.iseq.iseqptr' availability because they can be NULL.
-
-Thu Jun 25 14:14:16 2015  takiy33  <takiy33@gmail.com>
-
-	* test/test_prime.rb (test_eratosthenes_works_fine_after_timeout):
-	  use spaces instead of TABs in ruby codes.  [Fix GH-944]
-
-Thu Jun 25 07:08:35 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (obj_info, method_type_name): show method type name in a string
-	  instead of a number.
-
-Thu Jun 25 06:49:25 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (obj_info): show more details for T_IMEMO/imemo_ment.
-
-Thu Jun 25 06:40:46 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_method.c (rb_method_definition_reset): need a WB for
-	  VM_METHOD_TYPE_ATTRSET.
-
-Thu Jun 25 03:33:21 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (RGENGC_OBJ_INFO, obj_info): add a macro to enable/disable
-	  rich obj_info() output.
-
-	  At the default, the value of RGENGC_OBJ_INFO is
-	  (RGENGC_DEBUG | RGENGC_CHECK_MODE).
-
-	* gc.c (RGENGC_OBJ_INFO): force enable it to debug #11244.
-
-	* gc.c (gc_mark_ptr): print more details with obj_info().
-
-	* gc.c (gc_mark_children): remove useless debug prints.
-
-Thu Jun 25 02:40:33 2015  Eric Wong  <e@80x24.org>
-
-	* ext/openssl/ossl_ssl.c (ossl_ssl_read_internal):
-	  do not process kwargs in blocking mode
-	* test/openssl/test_ssl.rb: test sysread
-
-Wed Jun 24 16:54:11 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (gc_mark_children): add additional debug code for #11244.
-
-Wed Jun 24 16:05:42 2015  Eric Wong  <e@80x24.org>
-
-	* string.c (rb_str_justify): use RB_GC_GUARD
-
-Wed Jun 24 14:25:17 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (gc_mark_ptr): add a check code for #11244.
-
-	  It should be removed later. But we can remain this check
-	  because it is only a branch.
-
-Wed Jun 24 12:49:11 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* string.c (rb_fstring_cstr): new function to make a fstring from
-	  a string literal.
-
-	* internal.h (rb_fstring_lit): new macro to make a fstring from a
-	  string literal.
-
-	* include/ruby/intern.h (rb_strlen_lit): new macro to get the
-	  length of a string literal, borrowed from mruby/mruby@e4afd53.
-
-Wed Jun 24 12:21:16 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* re.c: Update documentation for Regexp class.
-	  [fix GH-937][ci skip] Patch by @davydovanton
-
-Wed Jun 24 09:23:03 2015  Eric Wong  <e@80x24.org>
-
-	* variable.c (generic_ivar_set): remove FL_ABLE check
-	  (gen_ivar_copy): ditto
-	  [ruby-core:69715]
-
-Wed Jun 24 08:28:15 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/ancdata.c (bsock_recvmsg_internal): reduce stack use
-	  [ruby-core:69595] [Feature #11263]
-
-Tue Jun 23 14:32:42 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* error.c (name_err_receiver): raise ArgumentError if no receiver
-	  is available on this exception object.  [Feature #10881]
-
-Tue Jun 23 09:48:34 2015  Eric Wong  <e@80x24.org>
-
-	* dir.c (check_dirname): avoid volatile, use return value
-	  (dir_s_chroot, dir_s_mkdir, dir_s_rmdir): adjust callers
-
-Tue Jun 23 06:37:10 2015  Eric Wong  <e@80x24.org>
-
-	* struct.c (struct_ivar_get): cache member definition in a subclass
-	  Thanks to Sokolov Yura aka funny_falcon <funny.falcon@gmail.com>
-	  in https://bugs.ruby-lang.org/issues/10585
-
-Tue Jun 23 04:58:06 2015  Eric Wong  <e@80x24.org>
-
-	* benchmark/bm_vm2_struct_big_href_hi.rb: new benchmark
-	* benchmark/bm_vm2_struct_big_href_lo.rb: ditto
-	* benchmark/bm_vm2_struct_big_hset.rb: ditto
-	* benchmark/bm_vm2_struct_small_href.rb: ditto
-	* benchmark/bm_vm2_struct_small_hset.rb: ditto
-	  Thanks to Sokolov Yura aka funny_falcon <funny.falcon@gmail.com>
-	  in https://bugs.ruby-lang.org/issues/10585
-
-Mon Jun 22 18:08:48 2015  Naohisa Goto  <ngotogenome@gmail.com>
-
-	* test/lib/test/unit.rb (Test::Unit::Parallel#start_watchdog): removed
-	  because it has been meaningless since r36385. [Bug #11288]
-
-	* test/lib/test/unit.rb (Test::Unit::Parallel#_run_parallel): delete
-	  lines related to the removed start_watchdog method
-
-Sun Jun 21 23:52:46 2015  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
-
-	* NEWS: mention Array#bsearch_index and Hash#fetch_values.
-
-Sun Jun 21 23:46:27 2015  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
-
-	* NEWS: add a reference to a ticket.
-
-Sun Jun 21 20:28:09 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* internal.h (roomof): extract from type_roomof, and move from
-	  bignum.c.
-
-Sun Jun 21 18:32:37 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ruby_atomic.h (ATOMIC_PTR_CAS): define by generic CAS macro, not
-	  via size_t, to suppress a warning by mingw gcc.
-
-Sun Jun 21 05:31:41 2015  Shota Fukumori  <her@sorah.jp>
-
-	* ext/objspace/objspace_dump.c(dump_object): Return empty JSON object when
-	  passed object is a special const, instead of SEGV.
-	  Based patch by Kohei Suzuki (eagletmt). [ruby-core:69692] [Bug #11291]
-
-	* test/objspace/test_objspace.rb(test_dump_special_consts): Test for above fix.
-
-
-Sat Jun 20 03:56:58 2015  Yusuke Endoh  <mame@ruby-lang.org>
-
-	* enc/make_encmake.rb: the list of encoding extension libraries must
-	  not include encinit.c itself.  It caused "undefined reference to
-	  Init_encinit".
-
-Sat Jun 20 02:03:53 2015  Naohisa Goto  <ngotogenome@gmail.com>
-
-	* process.c (rb_execarg_parent_start1): new macro ALWAYS_NEED_ENVP
-	  to generate envp_str anytime on Solaris 10 (or earlier version
-	  of Solaris) to avoid calling execv() which is async-signal unsafe
-	  on Solaris 10. [Bug #11265] [ruby-dev:49089]
-
-	* process.c (exec_with_sh, proc_exec_cmd): On Solaris 10,
-	  because ALWAYS_NEED_ENVP is 1 and envp_str is always generated,
-	  execv() in exec_with_sh() and proc_exec_cmd() are never called.
-	  To guarantee this, execv() is replaced by a macro to print
-	  out error message on Solaris 10.
-
-	* process.c (proc_exec_sh): Because proc_exec_sh() may be called
-	  by rb_proc_exec() with envp_str = Qfalse, execl() is replaced
-	  by a macro that calls execle() with "extern char **environ"
-	  traditional global variable on Solaris 10.
-	  TODO: This may be unsafe and should be changed in the future.
-	  Although rb_proc_exec() is not used from inside current version
-	  of ruby, it may be called by third-party extensions.
-
-Sat Jun 20 01:10:13 2015  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
-
-	* NEWS: mention about $SAFE.
-
-Fri Jun 19 14:53:35 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* proc.c (rb_mod_define_method): now requires a block direct to
-	  this method call.  [ruby-core:69655] [Bug #11283]
-
-Fri Jun 19 13:54:43 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* proc.c (rb_mod_define_method): get rid of inadvertent ID
-	  creations at error.
-
-Fri Jun 19 07:58:11 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/extmk.rb: if no with-ext option is given, default to
-	  enable everything.  [ruby-dev:49108] [Bug #11280]
-
-Fri Jun 19 06:30:07 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* bootstraptest/test_method.rb: remove a test because $SAFE=2 was
-	  obsolete.
-
-	  Please check btest, too.
-
-Thu Jun 18 23:51:51 2015  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
-
-	* bin/erb: $SAFE=3 is obsolete.
-
-Thu Jun 18 23:45:11 2015  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
-
-	* safe.c: removed needless doc related $SAFE=2
-
-Thu Jun 18 23:38:07 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* thread.c (rb_thread_safe_level): fix document.  $SAFE=3 is obsolete.
-	  [ci skip]
-
-Thu Jun 18 23:25:51 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/extmk.rb: configure intersection of with-ext and not
-	  without-ext, as withouts is no longer true by default if
-	  with-ext option is given.  [ruby-dev:49108] [Bug #11280]
-
-Thu Jun 18 23:20:46 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* include/ruby/ruby.h: $SAFE=2 is now obsolete.
-
-	* dir.c, ext/fiddle/handle.c, ext/socket/basicsocket.c, file.c
-	  gc.c, io.c, process.c, safe.c, signal.c, win32/file.c:
-	  removed code for $SAFE=2
-
-	* test/erb/test_erb.rb, test/fiddle/test_handle.rb
-	  test/ruby/test_env.rb: removed tests for $SAFE=2.
-
-Thu Jun 18 22:50:07 2015  Yusuke Endoh  <mame@ruby-lang.org>
-
-	* enc/make_encmake.rb: added --transes and --no-transes options.
-
-Thu Jun 18 18:24:12 2015  Eric Wong  <e@80x24.org>
-
-	* test/socket/test_unix.rb: replace sleep with select
-
-Thu Jun 18 17:59:06 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm.c (rb_vm_control_frame_id_and_class): remove useless codes.
-	  `me' knows ID and owner class.
-
-Thu Jun 18 16:58:35 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h: constify rb_method_alias_struct::original_me and
-	  rb_method_refined_struct::orig_me.
-
-	* class.c (move_refined_method): use RB_OBJ_WRITE() for
-	  me->def->body.refined.orig_me.
-
-Thu Jun 18 14:35:28 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* ext/objspace/objspace.c (count_imemo_objects): support imemo_ment.
-
-Thu Jun 18 13:32:46 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* error.c (name_err_receiver): add NameError#receiver method.
-	  [Feature #10881]
-
-Thu Jun 18 10:00:06 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* safe.c: removed needless doc related $SAFE=3
-
-Thu Jun 18 09:59:23 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* safe.c: rename old method name for $SAFE=3
-
-Thu Jun 18 06:02:42 2015  Eric Wong  <e@80x24.org>
-
-	* compile.c (get_exception_sym2type, iseq_build_from_ary_body):
-	  rely on %+PRIsVALUE instead of calling rb_inspect directly
-
-Wed Jun 17 20:59:25 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* common.mk (ENC_MK): needs fake.rb if cross compilation.
-	  [ruby-dev:49098] [Bug #11272]
-
-Wed Jun 17 20:23:29 2015  Tanaka Akira  <akr@fsij.org>
-
-	* ext/rbconfig/sizeof/extconf.rb: Check __float80.
-
-Wed Jun 17 15:15:53 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* safe.c (safe_setter): of course, don't have to warn the limitation of
-	  $SAFE=3 after it's removed.
-
-Wed Jun 17 14:29:43 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* include/ruby/ruby.h: $SAFE=3 is now obsolete.
-
-	* ext/socket/init.c, ext/socket/socket.c, ext/socket/tcpsocket.c
-	  ext/socket/udpsocket.c, gc.c, object.c, re.c, safe.c: removed code
-	  for $SAFE=3
-
-	* bootstraptest/test_method.rb, test/erb/test_erb.rb, test/ruby/test_dir.rb
-	  test/ruby/test_file.rb, test/ruby/test_method.rb, test/ruby/test_regexp.rb
-	  test/ruby/test_thread.rb: remove tests for $SAFE=3
-
-Wed Jun 17 12:13:33 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* ChangeLog: added contributor name.
-
-Wed Jun 17 10:57:28 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* lib/csv.rb: accept to use Range object for row selection.
-	  contributed by Mitsutaka Mimura.
-	  [Feature #11267][ruby-dev:49091]
-
-Wed Jun 17 09:50:12 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* lib/rdoc/servlet.rb (documentation_search, root_search):
-	  requires json for JSON.dump and fix sporadic failures due to
-	  the loading order.
-
-Tue Jun 16 19:19:53 2015  Tanaka Akira  <akr@fsij.org>
-
-	* ext/rbconfig/sizeof/extconf.rb: Check several types defined in C99
-	  and x86_64 ABI.
-
-	* template/sizes.c.tmpl: Relax a pattern for types.
-
-Tue Jun 16 17:37:01 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* test/objspace/test_objspace.rb: relax pattern because uncollectible
-	  flag and marked flag can be false at major GC.
-	  [Bug #10852]
-
-Tue Jun 16 04:50:44 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/basicsocket.c (bsock_recv): document outbuf
-	* ext/socket/unixsocket.c (unix_recvfrom): ditto
-	* ext/socket/init.c (rsock_strbuf, recvfrom_locktmp): new functions
-	  (rsock_s_recvfrom): support destination buffer as 3rd arg
-	  (rsock_s_recvfrom_nonblock): ditto
-	* string.c (rb_str_locktmp_ensure): export for internal ext
-	* test/socket/test_nonblock.rb: test recv_nonblock
-	* test/socket/test_unix.rb: test recv
-	  [ruby-core:69543] [Feature #11242]
-
-Tue Jun 16 04:38:02 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/ancdata.c (bsock_sendmsg_internal,
-	  bsock_recvmsg_internal):
-	  support "exception: false" kwarg
-	* ext/socket/init.c (rsock_s_recvfrom_nonblock):
-	  ditto
-	* ext/socket/init.c (rsock_s_recvfrom_nonblock): use rsock_opt_false_p
-	* ext/socket/socket.c (sock_connect_nonblock): ditto
-	* ext/socket/rubysocket.h (rsock_opt_false_p): new function
-	* ext/socket/basicsocket.c (bsock_recv_nonblock): update rdoc
-	* ext/socket/udpsocket.c (udp_recvfrom_nonblock): ditto
-	* test/socket/test_nonblock.rb: new tests
-	  [ruby-core:69542] [Feature #11229]
-
-Mon Jun 15 14:33:02 2015  Akinori MUSHA  <knu@iDaemons.org>
-
-	* lib/set.rb: Make Set#each and SortedSet#each generate a sized
-	  enumerator. [GH-931] by kachick (Kenichi Kamiya)
-
-	* test/test_set.rb: Import tests from Set into SortedSet. [GH-931]
-	  by kachick (Kenichi Kamiya)
-
-Mon Jun 15 02:26:34 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* lib/net/http.rb (Net::HTTP#connect): use connect_nonblock and
-	  io/wait to eliminate timeout use. fix GH-899
-
-Sat Jun 13 07:21:18 2015  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
-
-	* thread.c (thread_start_func_2): don't interrupt when last thread
-	  exit unless main thread is already exited. Otherwise main thread
-	  could be wrongly interrupted when it uses rb_thread_call_without_gvl().
-	  Patch by Takehiro Kubo. [Bug #11237][ruby-dev:49044][GH-898]
-
-	* test/-ext-/gvl/test_last_thread.rb: new test for the above fix.
-
-	* ext/-test-/gvl/call_without_gvl/call_without_gvl.c: new ext for
-	  the above test.
-	* ext/-test-/gvl/call_without_gvl/extconf.rb: ditto.
-
-Mon Jun 15 00:14:33 2015  Tanaka Akira  <akr@fsij.org>
-
-	* ext/pathname/lib/pathname.rb (descend): Blockless form supported.
-	  (ascend): Ditto.
-	  [ruby-core:68820] [Feature #11052] Patch by Piotr Szotkowski.
-
-Sun Jun 14 20:09:25 2015  Tanaka Akira  <akr@fsij.org>
-
-	* time.c (time_getlocaltime): [DOC] Add examples of valid utc_offset
-	  formats.
-	  [ruby-core:68306] [Misc #10905] Patch by Charles Korn.
-
-Sun Jun 14 18:49:56 2015  Tanaka Akira  <akr@fsij.org>
-
-	* ext/socket/raddrinfo.c (parse_numeric_port): Detect
-	  port overflow.
-	  (numeric_getaddrinfo): Use parse_numeric_port.
-	  numeric_getaddrinfo fails if port is too big now.
-	  This makes rb_getaddrinfo invokes the real getaddrinfo()
-	  on such condition.
-	  This change is related to [ruby-core:69355] [Bug #11179].
-
-Sun Jun 14 17:26:03 2015  Tanaka Akira  <akr@fsij.org>
-
-	* enum.c (enum_chunk_while): New method Enumerable#chunk_while.
-	  [ruby-core:67738] [Feature #10769] proposed by Tsuyoshi Sawada.
-
-Sun Jun 14 17:20:40 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* file.c (rb_file_load_ok): try opening file without gvl not to
-	  lock entire process.  [Bug #11060]
-
-Sun Jun 14 10:43:50 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/runruby.rb: just remove the lines of RUBY_VERSION check and raise
-	  instead of replacing the check to `true`, for getting rid of a
-	  warning `possibly useless use of true in void context`.
-
-Sun Jun 14 10:13:55 2015  Kouhei Sutou  <kou@cozmixng.org>
-
-	* lib/rexml/source.rb (REXML::IOSource#scan): Fix a typo in
-	  document. [fix GH-934]
-	  Patch by Anton Davydov. Thanks!!!
-
-Sun Jun 14 10:09:48 2015  Kouhei Sutou  <kou@cozmixng.org>
-
-	* lib/rexml/attlistdecl.rb (REXML::AttlistDecl): Fix a typo in
-	  document. [fix GH-934]
-	  Patch by Anton Davydov. Thanks!!!
-
-Sun Jun 14 06:24:57 2015  Benoit Daloze  <eregontp@gmail.com>
-
-	* test/ruby/test_io.rb: add test for IO.binread fd leak.
-	  See r50881.
-
-Sun Jun 14 05:23:51 2015  Benoit Daloze  <eregontp@gmail.com>
-
-	* io.c (rb_io_s_binread): close fd if seek offset is invalid.
-
-Sun Jun 14 04:40:32 2015  Benoit Daloze  <eregontp@gmail.com>
-
-	* test/lib/leakchecker.rb (check): refactor.
-
-Sun Jun 14 04:34:14 2015  Benoit Daloze  <eregontp@gmail.com>
-
-	* test/lib/leakchecker.rb: Return false for no leaks.
-	  Otherwise the GC could run for nothing.
-
-Sun Jun 14 04:15:40 2015  Benoit Daloze  <eregontp@gmail.com>
-
-	* lib/delegate.rb: [DOC] Update SimpleDelegator example. [ci skip]
-
-Sat Jun 13 20:28:14 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* file.c (rb_stat_ino): get inode from the interval of struct st.
-
-	* win32/win32.c (stati64_set_inode): get nFilIndexHigh/Low, and set it
-	  to the interval of struct st as inode.
-
-	* win32/win32.c (stati64_set_inode_handle): call stati64_set_inode.
-
-	* win32/win32.c (rb_w32_fstati64): call stati64_set_inode_handle.
-
-	* win32/win32.c (stati64_handle): call stati64_set_inode.
-
-Sat Jun 13 19:44:53 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* ext/io/console/depend (.list.chksum): revert a part of r50859, because
-	  it was not mentioned at its commit log and it caused a build error on
-	  Windows ($(MAKE) is already quoted).
-
-Sat Jun 13 17:35:11 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* vm_core.h (rb_thread_t): add th->name.
-
-	* vm.c (th_init): initialize th->name.
-
-	* thread.c (Init_Thread): add Thread.name and name=. [Feature #11251]
-
-	* thread.c (rb_thread_inspect): show thread's name if set.
-
-	* thread.c (rb_thread_getname): defined.
-
-	* thread.c (rb_thread_setname): ditto.
-
-Sat Jun 13 11:39:43 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* lib/tempfile.rb: Fix typo. [fix GH-933] Patch by @Zorbash
-
-Sat Jun 13 11:38:00 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* ext/openssl/ossl_ocsp.c: fix documentation on ocsp response cert status.
-	  [fix GH-932] Patch by @chrisholmes
-
-Sat Jun 13 11:35:19 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* ext/bigdecimal/bigdecimal.gemspec: Fix require paths for released gem.
-	  [fix GH-929] Patch by @voxik
-	* ext/io/console/io-console.gemspec: ditto.
-
-Sat Jun 13 00:45:08 2015  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
-
-	* lib/prime.rb: Return sized enumerators.
-	  Patch by Kenichi Kamiya [GH-931]
-
-Sat Jun 13 00:45:06 2015  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
-
-	* lib/prime.rb: Fix with_object with no block given
-
-Sat Jun 13 00:44:59 2015  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
-
-	* lib/prime.rb: Have with_index accept an offset parameter.
-	  Based on patch by T Yamada. [#11007]
-
-Fri Jun 12 22:21:12 2015  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
-
-	* test/ruby/test_extlibs.rb (TestExtLibs::check_existence): fix
-	  error. [Bug #11255] [ruby-dev:49079]
-
-Fri Jun 12 21:17:46 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* pack.c (pack_{un,}pack): new template character `j` and `J`, pointer
-	  with signed and unsigned integers.
-
-	* NEWS: mention about this feature.
-	  [Feature #11215] [ruby-dev:49015]
-
-Fri Jun 12 21:01:44 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* file.c (File::SHARE_DELETE): new flag to be able to delete opened file
-	  on Windows.
-
-	* include/win32/win32.c (O_SHARE_DELETE): new pseudo file mode flag.
-
-	* win32/win32.c (rb_w32_{w,}open): support above flag.  [EXPERIMENTAL]
-
-	* NEWS: mention about this feature.
-	  [Feature #11218] [ruby-dev:49022]
-
-Fri Jun 12 18:21:45 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* ChangeLog: added missing commit message.
-
-Fri Jun 12 18:20:37 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* sample/exyacc.rb: Fix some typos. [fix GH-927] Patch by @davydovanton
-	* sample/list.rb: ditto.
-	* sample/trick2013/kinaba/remarks.markdown: ditto.
-
-Fri Jun 12 17:34:14 2015  Wojciech Mach  <wojtek@wojtekmach.pl>
-
-	* hash.c (rb_hash_fetch_values): add `Hash#fetch_values`.
-	  [Feature #10017] [Fix GH-776]
-
-Fri Jun 12 16:28:17 2015  Radan Skoric  <radan.skoric@gmail.com>
-
-	* array.c (rb_ary_bsearch_index): Implement Array#bsearch_index
-	  method, which is similar to bsearch and returns the index or
-	  nil.  [Feature #10730]
-
-Thu Jun 11 19:11:22 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* ext/zlib/zlib.c: Fix indentation for rdoc.
-	  [Bug #11221][ruby-core:69465]
-
-Thu Jun 11 16:23:37 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h (METHOD_ENTRY_BASIC_SET): fix last commit (unbalanced parens).
-
-Thu Jun 11 15:14:16 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* configure.in: define SET_THREAD_NAME if it has pthread_set_name_np
-	  for FreeBSD, and don't define it if both pthread_setname_np
-	  and pthread_set_name_np don't exist.
-
-	* thread_pthread.c (SET_THREAD_NAME): don't define if they don't exist.
-
-	* thread_pthread.c (native_set_thread_name): run if SET_THREAD_NAME
-	  is defined.
-
-Thu Jun 11 15:53:31 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h (METHOD_ENTRY_BASIC_SET): should clear last bit.
-
-Thu Jun 11 14:34:45 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* lib/rubygems.rb: bump version to 2.4.7 and 2.4.8. these versions fixed
-	  CVE-2015-3900.
-	* lib/rubygems/remote_fetcher.rb: ditto.
-	* test/rubygems/test_gem_remote_fetcher.rb: added testcase for CVE-2015-3900
-
-Thu Jun 11 14:18:51 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* lib/rubygems.rb: bump version to 2.4.6. It's missing change at r49774.
-
-Thu Jun 11 13:50:19 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* array.c (ary_ensure_room_for_push): check if array size will
-	  exceed maximum size to get rid of buffer overflow.
-	  [ruby-dev:49043] [Bug #11235]
-
-	* array.c (ary_ensure_room_for_unshift, rb_ary_splice): ditto.
-
-Thu Jun 11 13:17:34 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* test/test_cmath.rb (TestCMath#test_trigonometric_functions): should
-	  not compare float values (in complex values) by `==`.
-
-Thu Jun 11 08:52:01 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h: embed rb_method_entry_t::attr::flags (5 bits) into
-	  rb_method_entry_t::flags to make one word spare space.
-
-	  Add some macros to access these flags.
-
-	* vm_method.c: use these macros.
-
-	* internal.h: define IMEMO_FL_USHIFT and IMEMO_FL_USER[0-4]
-	  for T_IMEMO local flags.
-
-Thu Jun 11 08:27:06 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm.c: use VM_ASSERT instead of assert().
-
-	* vm_args.c: ditto.
-
-	* vm_insnhelper.c: ditto.
-
-	* vm_method.c: ditto.
-
-Thu Jun 11 08:16:48 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_core.h: define VM_ASSERT() for assertion
-	  enabled only when (VM_CHECK_MODE > 0).
-
-	* vm_insnhelper.c: move definition VM_CHECK_MODE
-	  from vm_insnhelper.c to vm_core.h.
-
-	* vm.c: remove <assert.h>
-
-Thu Jun 11 06:46:07 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.c (check_frame): check type of cref_or_me first.
-
-Thu Jun 11 04:34:39 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* test/test_cmath.rb: Add some assertions.
-
-Thu Jun 11 00:34:39 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* template/fake.rb.in: expanded macro result may have spaces
-	  between tokens.  [ruby-dev:49047] [Bug #11243]
-
-Wed Jun 10 22:27:32 2015  Naohisa Goto  <ngotogenome@gmail.com>
-
-	* lib/mkmf.rb: revert r50804 because of build failure when specifying
-	  LDFLAGS during configure, observed on Solaris with GCC 4.6.
-	  [Bug #11245]
-
-Wed Jun 10 21:59:51 2015  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
-
-	* README.ja.md: fix markup miss.
-
-Wed Jun 10 11:06:25 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* template/fake.rb.in: turn into erb template from autoconf
-	  template to fake more accurately.
-
-	* common.mk (fake.rb): needs preprocessed file now.
-
-	* version.c (Init_version): add dummy expression to
-	  RUBY_ENGINE_VERSION.
-
-Tue Jun  9 12:31:25 2015  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
-
-	* lib/prime.rb: Simplify and optimize EratosthenesSieve
-
-Tue Jun  9 11:45:00 2015  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
-
-	* lib/prime.rb: Simplify and optimize EratosthenesSieve
-	  based on patch by Ajay Kumar. [Fixes GH-921]
-
-Mon Jun  8 05:09:58 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (obj_info): print method id for T_IMEMO/ment.
-
-Sun Jun  7 07:05:43 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* Move test cases from test/ruby/test_complex.rb to test/test_cmath.rb
-
-Sat Jun  6 18:23:41 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h: back to share rb_method_definition_t by
-	  rb_method_entry_t.
-
-	  r50728 changed sharing `def's to isolating `def's
-	  on alias and so on. However, this change conflicts
-	  future improvement plan. So I change back to sharing approach.
-
-	* method.h: move rb_method_definition_t::flags to
-	  rb_method_entry_t::attr::flags.
-
-	  rb_method_entry_t::attr is union with VALUE because this field
-	  should have same size of VALUE. rb_method_entry_t is T_IMEMO).
-
-	  And also add the following access macros to it's fields.
-
-	  * METHOD_ENTRY_VISI(me)
-	  * METHOD_ENTRY_BASIC(me)
-	  * METHOD_ENTRY_SAFE(me)
-
-	* vm_method.c (rb_method_definition_addref): added instead of
-	  rb_method_definition_clone().
-
-	  Do not create new definition, but increment alias_count.
-
-	* class.c (clone_method): catch up this fix.
-
-	* class.c (method_entry_i): ditto.
-
-	* proc.c (mnew_internal): ditto.
-
-	* proc.c (mnew_missing): ditto.
-
-	* vm_eval.c: ditto.
-
-	* vm_insnhelper.c: ditto.
-
-	* vm_method.c: ditto.
-
-Sat Jun  6 15:59:38 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* class.c: ins_methods_push() needs rb_method_visibility_t type on
-	  2nd arg.
-
-Sat Jun  6 15:05:47 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* class.c (ins_methods_push): Change type and name of parameters
-	  to make more clear.
-
-Sat Jun  6 08:52:13 2015  Eric Wong  <e@80x24.org>
-
-	* test/socket/test_nonblock.rb: try to avoid EMSGSIZE
-	  [ruby-core:69466]
-
-Sat Jun  6 07:58:30 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c: remove struct mark_tbl_arg and pass objspace directly
-	  to avoid indirect access overhead.
-
-Sat Jun  6 07:08:45 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/ancdata.c (bsock_sendmsg_internal): drop redundant assignment
-
-Sat Jun  6 01:00:06 2015  Naohisa Goto  <ngotogenome@gmail.com>
-
-	* ext/socket/ancdata.c (bsock_sendmsg_internal): all arguments are
-	  parsed even on systems without HAVE_STRUCT_MSGHDR_MSG_CONTROL
-	  to prevent SEGV caused by passing Qnil to RARRAY_LENINT and
-	  to preserve behavior before r50776.
-	  [Bug #11224] [ruby-core:69468] [Bug #11225] [ruby-core:69469]
-
-Fri Jun  5 22:37:42 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* class.c (ins_methods_push): change 3rd parameter's type
-	  from long to rb_method_visibility_t.
-
-	* class.c (ins_methods_i): catch up this fix.
-
-	* class.c (method_entry_i): cast to st_data_t instead of `long'.
-
-Fri Jun  5 20:37:10 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* internal.h: move definition of rb_cref_t to method.h.
-
-	* eval_intern.h: move definition of rb_scope_visibility_t
-	  to method.h.
-
-	* method.h: change rb_cref_t::scope_visi from VALUE to
-	  rb_scope_visibility_t.
-	  [Bug #11219]
-
-	* vm.c (vm_cref_new): accept rb_method_visibility_t directly.
-
-	* vm_insnhelper.c (rb_vm_rewrite_cref): don't use 0,
-	  but METHOD_VISI_UNDEF.
-
-	* vm_method.c (rb_scope_visibility_set): don't need to use cast.
-
-	* vm_method.c (rb_scope_module_func_set): ditto.
-
-Fri Jun  5 17:27:30 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/ancdata.c (bsock_sendmsg_internal): avoid msg_control
-	  ptr if msg_controllen is zero to fix portability problems.
-
-Fri Jun  5 09:17:45 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/ancdata.c (bsock_sendmsg_internal): fix build error
-	  from r50776
-
-Fri Jun  5 07:05:58 2015  Eric Wong  <e@80x24.org>
-
-	* io.c (sym_wait_readable, sym_wait_writable): declare
-	  (io_getpartial): use sym_wait_readable
-	  (io_write_nonblock): use sym_wait_writable
-	  (Init_IO): initialize sym_wait_*able
-
-Fri Jun  5 06:43:00 2015  Eric Wong  <e@80x24.org>
-
-	* doc/extension.rdoc: note rb_get_kwargs changes keywords_hash
-	  [ruby-core:68507]
-
-Fri Jun  5 05:50:29 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/ancdata.c (bsock_sendmsg_internal): use rb_scan_args
-	  [ruby-core:69439] [Feature #11207]
-
-Fri Jun  5 02:20:06 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* test/lib/envutil.rb (assert_no_memory_leak): change default value
-	  of limit from 1.5 to 2.0. It is ad-hoc fix to solve test failure
-	  in travis-ci.
-
-Fri Jun  5 01:17:21 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.c (vm_defined): no need to use cast.
-
-Fri Jun  5 01:14:02 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.c (vm_defined): show additional messages on rb_bug().
-
-Fri Jun  5 01:06:02 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_method.c (rb_add_method_iseq): use intermediate struct to
-	  avoid initializing struct with variables.
-	  [Bug #11217]
-
-	* method.h: add a comment about it.
-
-Fri Jun  5 00:55:21 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h: constify rb_method_refined_t::orig_me.
-
-	  Also constify the following functions.
-
-	  * rb_resolve_refined_method()
-	  * rb_method_entry_with_refinements()
-	  * rb_method_entry_without_refinements()
-	  * rb_method_entry_copy()'s parameter.
-
-	* class.c: catch up this fix.
-
-	* vm_insnhelper.c: ditto.
-
-	* vm_method.c: ditto.
-
-Thu Jun  4 12:47:54 SGT 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* array.c: Revert r50763. because "reentered" is not typo.
-
-Thu Jun  4 11:12:29 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* ext/win32ole/win32ole.c: fix a typo. Patch by @davydovanton
-	  [fix GH-923]
-	* include/ruby/st.h: ditto.
-	* include/ruby/util.h: ditto.
-
-Thu Jun  4 10:54:30 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* array.c: fix a typo. Patch by @manish-shrivastava
-	  [fix GH-922]
-
-Thu Jun  4 09:52:02 2015  Eric Wong  <e@80x24.org>
-
-	* ext/openssl/lib/openssl/ssl.rb: use io/nonblock instead of fcntl
-	  [ruby-core:69382] [Feature #11190]
-
-Thu Jun  4 07:22:45 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h: introduce rb_method_refined_t for refined method entry.
-
-	* class.c (move_refined_method): catch up this fix.
-
-	* gc.c (mark_method_entry): ditto.
-
-	* vm_eval.c (vm_call0_body): ditto.
-
-	* vm_insnhelper.c (vm_call_method): ditto.
-
-	* vm_method.c: ditto.
-
-Thu Jun  4 07:12:20 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (dirent_match): match short names only when FNM_SHORTNAME
-	  flag is given, for the backward compatibility, and the new
-	  behavior is often dangerous.  [ruby-core:69435] [Bug #11206]
-
-Thu Jun  4 05:44:01 2015  Eric Wong  <e@80x24.org>
-
-	* variable.c (special_generic_ivar): remove flag
-	  (givar_i, rb_mark_generic_ivar_tbl): remove functions
-	  (rb_free_generic_ivar, rb_ivar_lookup, rb_ivar_delete,
-	   generic_ivar_set, rb_ivar_set, rb_ivar_defined,
-	   rb_copy_generic_ivar, rb_ivar_foreach, rb_ivar_count,
-	   rb_obj_remove_instance_variable):
-	   adjust for lack of ivar support in special constants
-	* test/ruby/test_variable.rb: test ivars for special consts
-	* internal.h: remove rb_mark_generic_ivar_tbl decl
-	* gc.c (gc_mark_roots): remove rb_mark_generic_ivar_tbl call
-	  [ruby-core:69441] [Feature #11208]
-
-Thu Jun  4 05:13:34 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.c (def_iseq_ptr): `iseqval' is not available any more.
-
-Thu Jun  4 04:50:12 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* class.c (method_entry_i): mtbl should not have `me' as NULL.
-
-Thu Jun  4 04:28:45 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* class.c (clone_method): do not use me->klass, but use explicitly
-	  passed argument.
-
-Thu Jun  4 04:10:43 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_core.h (rb_vm_rewrite_cref_stack): rename to rb_vm_rewrite_cref().
-
-	* class.c (clone_method): use renamed name.
-
-	* vm_insnhelper.c (rb_vm_rewrite_cref): do not use `node' in variable
-	  names.
-
-Wed Jun  3 23:03:50 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_method.c: rename `rb_frame_...' to `rb_scope_...'.
-
-	* eval_intern.h: move decl. of rb_scope_visibility_set() to method.h.
-
-	* load.c: catch up this fix.
-
-Wed Jun  3 21:14:20 2015  Tanaka Akira  <akr@fsij.org>
-
-	* ext/rbconfig/sizeof/extconf.rb: Check C99 standard integer types.
-
-Wed Jun  3 21:00:47 2015  Tanaka Akira  <akr@fsij.org>
-
-	* configure.in: Don't check __int128.
-
-	* ext/rbconfig/sizeof/extconf.rb: Check __int128.
-
-	* ext/rbconfig/sizeof/depend: sizes.c depends on
-	  ext/rbconfig/sizeof/extconf.rb.
-
-	* template/sizes.c.tmpl: Detect check_sizeof.
-
-Wed Jun  3 20:07:07 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* class.c (clone_method): remove redundant check for me->def != NULL.
-	  Now, all `me` have `me->def`.
-
-	* proc.c (rb_method_entry_location): ditto.
-
-	* vm.c (rb_vm_check_redefinition_opt_method): ditto.
-
-	* vm.c (add_opt_method): ditto.
-
-	* vm_eval.c (vm_call0_body): ditto.
-
-Wed Jun  3 19:24:12 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_core.h: rename enum missing_reason to enum method_missing_reason.
-
-	* vm_core.h: use enum method_missing_reason for
-	  rb_thread_t::method_missing_reason.
-
-	* vm_eval.c: catch up this fix.
-
-	* vm_insnhelper.c: ditto.
-
-Wed Jun  3 16:17:21 2015  Aaron Patterson <tenderlove@ruby-lang.org>
-
-	* vm.c: eagerly allocate `loading_table`.  This eliminates the need to
-	  do NULL checks when looking up the `loading_table` hash.
-	  https://github.com/ruby/ruby/pull/918
-
-	* load.c: remove various NULL checks
-
-Wed Jun  3 11:47:15 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h: change fields order to gather frequent access fields.
-
-	* vm_insnhelper.c (vm_call_method): add LIKELY().
-
-Wed Jun 03 10:35:45 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h: split rb_method_definition_t::flag to several flags.
-
-	  `flag' contains several categories of attributes and it makes us
-	  confusion (at least, I had confused).
-
-	  * rb_method_visibility_t (flags::visi)
-	    * NOEX_UNDEF     -> METHOD_VISI_UNDEF     = 0
-	    * NOEX_PUBLIC    -> METHOD_VISI_PUBLIC    = 1
-	    * NOEX_PRIVATE   -> METHOD_VISI_PRIVATE   = 2
-	    * NOEX_PROTECTED -> METHOD_VISI_PROTECTED = 3
-	  * NOEX_SAFE(flag)  -> safe (flags::safe, 3 bits)
-	  * NOEX_BASIC       -> basic (flags::basic, 1 bit)
-	  * NOEX_MODFUNC     -> rb_scope_visibility_t in CREF
-	  * NOEX_SUPER       -> MISSING_SUPER (enum missing_reason)
-	  * NOEX_VCALL       -> MISSING_VCALL (enum missing_reason)
-	  * NOEX_RESPONDS    -> BOUND_RESPONDS (macro)
-
-	  Now, NOEX_NOREDEF is not supported (I'm not sure it is needed).
-
-	  Background:
-	    I did not know what "NOEX" stands for.
-	    I asked Matz (who made this name) and his answer was "Nothing".
-	    "At first, it meant NO EXport (private), but the original
-	    meaning was gone."
-	    This is why I remove the mysterious word "NOEX" from MRI.
-
-	* vm_core.h: introduce `enum missing_reason' to represent
-	  method_missing (NoMethodError) reason.
-
-	* eval_intern.h: introduce rb_scope_visibility_t to represent
-	  scope visibility.
-	  It has 3 method visibilities (public/private/protected)
-	  and `module_function`.
-
-Wed Jun  3 08:06:30 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* gem/bundled_gems: updated to test-unit 3.1.1 and minitest 5.7.0.
-
-Wed Jun  3 04:48:05 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.c (vm_defined): check respond_to_missing?
-	  at defined?(func()).
-	  [Bug #11212]
-
-	* test/ruby/test_defined.rb: add a test for this fix.
-
-Wed Jun  3 04:34:39 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.c (vm_defined): skip respond_to_missing? when
-	  a method is available.
-	  [Bug #11211]
-
-	* test/ruby/test_defined.rb: add a test for this fix.
-
-Wed Jun  3 04:14:13 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* insns.def (defined), vm_insnhelper.c (vm_defined):
-	  move instruction body to the vm_defined() function.
-
-Wed Jun  3 02:29:25 2015  Benoit Daloze  <eregontp@gmail.com>
-
-	* test/ruby/test_module.rb: Do not assume class variable order.
-	  Patch by @enebo.
-
-Wed Jun  3 01:10:38 2015  Yusuke Endoh  <mame@tsg.ne.jp>
-
-	* vm_method.c (rb_method_definition_set): remove a double assignment.
-	  Coverity Scan found this bug.
-
-Wed Jun  3 00:04:51 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_method.c (rb_alias): rename parameter names.
-
-Tue Jun  2 23:27:18 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h: remove rb_method_iseq_t::iseqval.
-	  While making a r50728, iseqval is needed (to mark correctly),
-	  but now just iseqptr is enough.
-
-	* class.c: catch up this fix.
-
-	* gc.c: ditto.
-
-	* proc.c: ditto.
-
-	* vm_method.c: ditto.
-
-Tue Jun  2 21:29:28 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* proc.c (proc_curry): remove a debug line.
-
-Tue Jun  2 12:43:46 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h: make rb_method_entry_t a VALUE.
-	  Motivation and new data structure are described in [Bug #11203].
-
-	  This patch also solve the following issues.
-
-	  * [Bug #11200] Memory leak of method entries
-	  * [Bug #11046] __callee__ returns incorrect method name in orphan
-	                 proc
-
-	* test/ruby/test_method.rb: add a test for [Bug #11046].
-
-	* vm_core.h: remove rb_control_frame_t::me. me is located at value
-	  stack.
-
-	* vm_core.h, gc.c, vm_method.c: remove unlinked_method... codes
-	  because method entries are simple VALUEs.
-
-	* method.h: Now, all method entries has own independent method
-	  definitions. Strictly speaking, this change is not essential,
-	  but for future changes.
-
-	  * rb_method_entry_t::flag is move to rb_method_definition_t::flag.
-	  * rb_method_definition_t::alias_count is now
-	    rb_method_definition_t::alias_count_ptr, a pointer to the counter.
-
-	* vm_core.h, vm_insnhelper.c (rb_vm_frame_method_entry) added to
-	  search the current method entry from value stack.
-
-	* vm_insnhelper.c (VM_CHECK_MODE): introduced to enable/disable
-	  assertions.
-
-Tue Jun  2 10:46:36 2015  Eric Wong  <e@80x24.org>
-
-	* test/socket/test_nonblock.rb: new test for sendmsg_nonblock
-
-Tue Jun  2 09:04:14 2015  Eric Wong  <e@80x24.org>
-
-	* lib/benchmark.rb: just use Process::CLOCK_MONOTONIC
-	  [ruby-core:69390]
-
-Mon Jun  1 22:01:27 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* lib/mkmf.rb (pkg_config): split --libs if --libs-only-l option
-	  is not available.  patch in [ruby-core:69428] by Hans Mackowiak.
-	  [ruby-core:69421] [Bug #11201]
-
-Mon Jun  1 21:18:24 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (gc_mark_children): remove a garbage character
-	  introduced at the last commit.
-
-Mon Jun  1 19:24:42 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_method.c (rb_method_entry_make): do not show warning message
-	  when method_entry is an alias.
-
-Mon Jun  1 15:47:16 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* internal.h: move class related definitions.
-
-Mon Jun  1 15:43:03 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* class.c: remove needless include pragma for method.h.
-
-	* struct.c: ditto.
-
-	* vm_method.c: ditto.
-
-Mon Jun  1 05:42:00 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* eval_intern.h, vm_method.c: move macros to functions.
-	  * SCOPE_TEST(f)  -> rb_frame_visibility_test(flag).
-	  * SCOPE_CHECK(f) -> rb_frame_visibility_check(flag).
-	  * SCOPE_SET(f)   -> rb_frame_visibility_set(flag).
-
-	* load.c (load_ext): use it.
-
-Mon Jun  1 04:47:37 2015  Zachary Scott  <e@zzak.io>
-
-	* ext/date/date_core.c: [DOC] Add comparison of Time and DateTime
-	  Patch provided by @pixeltrix
-
-Mon Jun  1 04:22:09 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_core.h (VM_FRAME_MAGIC_DUMMY): introduce new frame type to
-	  recognize dummy frame.
-
-	* vm.c (th_init): use new frame type.
-
-	* vm_args.c (raise_argument_error): ditto.
-
-Mon Jun  1 04:15:42 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* class.c (rb_class_has_methods): added to reduce dependency
-	  to internal class data structure.
-
-	* internal.h: ditto.
-
-	* hash.c (has_extra_methods): use added function.
-
-Mon Jun  1 04:11:48 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c , gc.h (rb_obj_info): export obj_info(VALUE) for debugging.
-
-Mon Jun  1 03:52:55 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* test/ruby/test_gc.rb: increase timeout seconds for GC stressful
-	  debugging.
-
-Sun May 31 04:18:06 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h: fix typo of comments.
-
-Sun May 31 03:36:42 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h: add VM_METHOD_TYPE_ALIAS rb_method_definition_t::type
-	  to fix [Bug #11173].
-
-	  Now, inter class/method alias creates new method entry
-	  VM_METHOD_TYPE_ALIAS, which has an original method entry.
-
-	* vm_insnhelper.c (find_defined_class_by_owner): added.
-	  Search corresponding defined_class from owner class/module.
-
-	* vm_method.c (rb_method_entry_get_without_cache): return me->klass
-	  directly for defined_class.
-
-	  Now, no need to check me->klass any more.
-
-	* vm_method.c (method_entry_set0): separated from method_entry_set().
-
-	* vm_method.c (rb_alias): make method entry has VM_METHOD_TYPE_ALIAS.
-
-	* vm_method.c (release_method_definition): support VM_METHOD_TYPE_ALIAS.
-
-	* vm_method.c (rb_hash_method_definition): ditto.
-
-	* vm_method.c (rb_method_definition_eq): ditto.
-
-	* vm_method.c (release_method_definition): ditto.
-
-	* vm_insnhelper.c (vm_call_method): ditto.
-
-	* vm_insnhelper.c (vm_method_cfunc_entry): ditto.
-
-	* vm_eval.c (vm_call0_body): ditto.
-
-	* gc.c (mark_method_entry): ditto.
-
-	* proc.c (method_def_iseq): ditto.
-
-	* proc.c (method_cref): ditto.
-
-	* proc.c (rb_method_entry_min_max_arity): ditto.
-
-	* test/ruby/test_alias.rb: add tests.
-
-	* test/ruby/test_module.rb: fix a test to catch up current behavior.
-
-Sun May 31 03:34:25 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_method.c (rb_unlink_method_entry): make it static.
-
-Sun May 31 03:26:58 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h, vm_method.c (rb_free_method_entry): constify a parameter.
-
-	* vm_core.h: remove useless declaration about rb_unlink_method_entry().
-
-Sat May 30 18:05:02 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* lib/tempfile.rb (Remover#call): fixed wrong condition.  introduced at
-	  r50682.
-
-Sat May 30 16:12:35 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/ancdata.c: use RB_GC_GUARD instead of volatile
-	  [ruby-core:69419] [Feature #11198]
-
-Sat May 30 15:59:10 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* lib/tempfile.rb (Tempfile#initialize): initialize @unlinked to fix
-	  test failures introduced at r50682.  I hope that check the results of
-	  tests before committing, at least the tests about the changed feature.
-
-Sat May 30 11:02:55 2015  Martin Englund <martin@englund.nu>
-
-	* doc/dtrace_probes.rdoc: change lingering dtrace probe documentation
-	  from function- to method-
-
-Sat May 30 10:26:09 2015  Masaki Matsushita <glass.saga@gmail.com>
-
-	* lib/tempfile.rb: refactoring.
-	  * use warn instead of STDERR.print
-	  * remove @tmpname and use @tmpfile.path
-	  * introduce @unlinked flag
-	  * Remover takes only @tmpfile
-	  * mode will be modified just before file reopen
-
-Sat May 30 09:02:51 2015  Eric Wong  <e@80x24.org>
-
-	* include/ruby/intern.h (rb_generic_ivar_table): deprecate
-	* internal.h (rb_attr_delete): declare
-	* marshal.c (has_ivars): use rb_ivar_foreach
-	  (w_ivar): ditto
-	  (w_object): update for new interface
-	* time.c (time_mload): use rb_attr_delete
-	* variable.c (generic_ivar_delete): implement
-	  (rb_ivar_delete): ditto
-	  (rb_attr_delete): ditto
-	  [ruby-core:69323] [Feature #11170]
-
-Sat May 30 09:14:28 2015  Scott Francis  <scott.francis@shopify.com>
-
-	* cont.c (cont_free): check if ruby_current_thread is still valid.
-	  [Fix GH-914]
-
-Sat May 30 08:36:04 2015  Eric Wong  <e@80x24.org>
-
-	* variable.c (static int special_generic_ivar): move
-	  (rb_generic_ivar_table): rewrite for compatibility
-	  (gen_ivtbl_bytes): new function
-	  (generic_ivar_get): update to use ivar index
-	  (generic_ivar_update): ditto
-	  (generic_ivar_set): ditto
-	  (generic_ivar_defined): ditto
-	  (generic_ivar_remove): ditto
-	  (rb_mark_generic_ivar): ditto
-	  (givar_i): ditto
-	  (rb_free_generic_ivar): ditto
-	  (rb_mark_generic_ivar_tbl): ditto
-	  (rb_generic_ivar_memsize): ditto
-	  (rb_copy_generic_ivar): ditto
-	  (rb_ivar_set): ditto
-	  (rb_ivar_foreach): ditto
-	  (rb_ivar_count): ditto
-	  (givar_mark_i): remove
-	  (gen_ivtbl_mark): new function
-	  (gen_ivar_each): ditto
-	  (iv_index_tbl_extend): update for struct ivar_update
-	  (iv_index_tbl_newsize): ditto
-	  [ruby-core:69323] [Feature #11170]
-
-Sat May 30 08:10:46 2015  Eric Wong  <e@80x24.org>
-
-	* variable.c (iv_index_tbl_make): extract from rb_ivar_set
-	  (iv_index_tbl_extend): ditto
-	  (iv_index_tbl_newsize): ditto
-	  (rb_ivar_set): use extracted functions
-	  [ruby-core:69323] (Part 1)
-
-Fri May 29 17:39:14 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* tool/make_hgraph.rb: added.
-
-Fri May 29 14:39:00 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* compile.c (iseq_compile_each): out of range NTH_REF is always
-	  nil.
-
-	* parse.y (parse_numvar): check overflow of NTH_REF and range.
-	  [ruby-core:69393] [Bug #11192]
-
-	* util.c (ruby_scan_digits): make public and add length parameter.
-
-Fri May 29 11:18:58 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/ancdata.c (bsock_sendmsg_internal,
-	  bsock_recvmsg_internal):
-	  avoid redundant fcntl on Linux
-	  [ruby-core:69154] [Feature #11145]
-	* ext/socket/init.c (rsock_s_recvfrom_nonblock): ditto
-	* ext/socket/rubysocket.h (MSG_DONTWAIT_RELIABLE): new macro
-
-Fri May 29 10:30:34 2015  Eric Wong  <e@80x24.org>
-
-	* lib/net/resolv.rb (request): use monotonic clock
-	* lib/net/http.rb (begin_transport, end_transport): ditto
-	  [ruby-core:69384] [Feature #11124]
-
-Fri May 29 04:37:38 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* ext/objspace/objspace.c: add two methods to debug internals.
-
-	  * ObjectSpace.internal_class_of: return RBASIC_CLASS(obj).
-	  * ObjectSpace.internal_super_of: return RCLASS_SUPER(cls).
-
-	* NEWS: add information about both methods.
-
-	* test/objspace/test_objspace.rb: add tests for both methods.
-
-Thu May 28 06:55:53 2015  Anton Davydov  <antondavydov.o@gmail.com>
-
-	* ext/tk/sample/figmemo_sample.rb (open_file),
-	  ext/tk/sample/tktextio.rb (TkTextIO): fix typo in messages.
-	  [Fix GH-916]
-
-Wed May 27 09:50:51 2015  Eric Wong  <e@80x24.org>
-
-	* ext/openssl/ossl_asn1.c (ossl_asn1_traverse, ossl_asn1_decode,
-	  ossl_asn1_decode_all): use RB_GC_GUARD instead of volatile
-	  [ruby-core:69371] [Bug #11185]
-
-Wed May 27 09:27:30 2015  Eric Wong  <e@80x24.org>
-
-	* lib/drb/drb.rb (set_sockopt): remove redundant fcntl call
-	* lib/drb/unix.rb (set_sockopt): ditto
-	  [ruby-core:69128] [Feature #11137]
-
-Tue May 26 22:10:43 2015  Shugo Maeda  <shugo@ruby-lang.org>
-
-	* vm_method.c (rb_alias): should resolve refined methods.
-	  [ruby-core:69360] [Bug #11182]
-
-Tue May 26 21:35:13 2015  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
-
-	* include/ruby/defines.h (RUBY_ATTR_ALLOC_SIZE): fix condition.
-
-Mon May 25 22:35:58 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/redmine-backporter.rb (rel): after the relations is changed,
-	  @changesets is no longer right.
-
-Mon May 25 11:27:14 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* win32/win32.c (setup_overlapped): seek to the file end only when
-	  writing (mode:a), not reading (mode:a+, read).
-
-Mon May 25 00:27:37 2015  Benoit Daloze  <eregontp@gmail.com>
-
-	* numeric.c (Numeric#negative?): [DOC] Fix call-seq.
-	  Patch by @yui-knk. [Fixes GH-908]
-
-Sun May 24 01:35:22 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* debug.c (ruby_debug_print_id): use rb_id2name() for fprintf().
-
-Sat May 23 18:38:46 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* man/*.1: updated dates in man pages.
-	  [ruby-dev:48988] [Bug #11171]
-
-Sat May 23 03:10:58 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* win32/win32.c (rb_w32_write_console): should return the count of
-	  actually eaten characters, include escape sequences.
-
-Fri May 22 22:36:14 2015  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
-
-	* lib/prime.rb: Remove obsolete Prime.new
-	  patch by Ajay Kumar. [Fixes GH-891]
-
-Fri May 22 21:13:12 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* include/ruby/intern.h (rb_sym_count): move `rb_sym_all_symbols`
-	  to a symbol.c specific section.  a part of patch by Lourens
-	  Naude.
-
-Fri May 22 20:56:33 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* complex.c (f_complex_polar): simple bug reproduced only when y is
-	  a float but x is not a float.
-
-Fri May 22 19:42:06 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* process.c (rb_spawn_process): do not discard global escape
-	  status.  [ruby-core:69304] [Bug #11166]
-
-	* process.c (rb_execarg_spawn): extract the start procedure in a
-	  parent process with ensuring the end procedure.
-
-Fri May 22 16:48:32 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* NEWS: added news for net-telnet and rake
-
-Thu May 21 20:27:07 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* configure.in (RUBY_DTRACE_POSTPROCESS): cmp -b is GNU extension.
-	  darwin uses GNU cmp, and FreeBSD and Solaris are not.
-	  Note that accidentally equals to expected result.
-
-Thu May 21 18:00:19 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* iseq.c: constify.
-
-	* iseq.h: ditto.
-
-	* method.h: ditto.
-
-	* proc.c: ditto.
-
-	* vm_method.c: ditto.
-
-Thu May 21 17:44:53 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* proc.c: fix issues caused by binding created from Method#to_proc.
-	  [Bug #11163]
-
-	* vm.c (vm_cref_new_toplevel): export as rb_vm_cref_new_toplevel().
-
-	* test/ruby/test_method.rb: add some assertions.
-
-Thu May 21 17:29:26 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* lib/matrix.rb: added documentation for Matrix#empty and Matrix#/
-	  [Feature #10070][ruby-dev:48433] Patch by @gogotanaka
-
-Thu May 21 17:02:43 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* proc.c: rename functions.
-	  * method_get_def() -> method_def()
-	  * method_get_iseq() -> method_def_iseq()
-	  * method_get_cref() -> method_cref()
-
-Thu May 21 16:52:44 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* proc.c (rb_method_get_iseq): rename to rb_method_iseq.
-
-	* iseq.c: catch up this fix.
-
-	* iseq.h: commit ditto.
-
-Thu May 21 15:41:45 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* lib/net/telnet.rb: gemify net-telnet.
-	  [Feature #11083]
-	* gems/bundled_gems: added net-telnet to bundled gems.
-
-Thu May 21 15:37:32 2015  Zachary Scott  <e@zzak.io>
-
-	* vm_method.c: Remove private attribute warning [Bug #10967]
-	  Patch by @spastorino [Fixes GH-849]
-	  https://github.com/ruby/ruby/pull/849
-
-	* test/ruby/test_module.rb: Update test for changes
-
-Thu May 21 10:59:43 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* proc.c (method_proc): rename to method_to_proc.
-
-Thu May 21 10:51:54 2015  Jake Worth  <jakeworth82@gmail.com>
-
-	* io.c (rb_f_select): [DOC] Fixes for grammar and style.
-	  [Fix GH-906]
-
-Thu May 21 08:25:19 2015  Eric Wong  <e@80x24.org>
-
-	* variable.c (Init_var_tables): init generic_iv_tbl
-	  (rb_generic_ivar_table, generic_ivar_get, generic_ivar_set,
-	   generic_ivar_defined, generic_ivar_remove,
-	   rb_mark_generic_ivar, givar_i, rb_mark_generic_ivar_tbl,
-	   rb_free_generic_ivar, rb_copy_generic_ivar, rb_ivar_foreach,
-	   rb_ivar_count): remove checks for uninitialize generic_iv_tbl
-	[ruby-core:69155] [Feature #11146]
-
-Thu May 21 04:11:03 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* iseq.c (exception_type2symbol): show correct bug message.
-
-Wed May 20 23:19:05 2015  Yusuke Endoh  <mame@ruby-lang.org>
-
-	* lib/base64.rb: Fix rdoc-formatting for padding argument.
-	  [fix GH-905][ci skip] Patch by @davydovanton
-
-Wed May 20 13:16:23 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* configure.in (DEPRECATED_BY): deprecate warning with preferable
-	  alternative.
-
-	* configure.in (RUBY_FUNC_ATTRIBUTE): allow attribute arguments in
-	  the macro.
-
-Wed May 20 11:23:24 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* vm_dump.c (rb_print_backtrace): return value of libexec's backtrace
-	  is size_t, so simply cast as int.
-
-Tue May 19 18:54:41 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* iseq.c (rb_iseq_compile_with_option): check source type, must be
-	  an IO or a String.  [ruby-core:69219] [Bug #11159]
-
-Tue May 19 17:15:03 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* lib/benchmark.rb: Update Benchmark documentation and formatting.
-	  [fix GH-903][ci skip] Patch by @davydovanton
-
-Tue May 19 13:10:08 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* numeric.c (num_positive_p): should false on Bignum 0.
-	  http://twitter.com/rafaelfranca/status/600509783427391488
-	  [ruby-core:69173] [Feature #11151]
-
-Tue May 19 11:22:28 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* lib/uri/rfc2396_parser.rb (initialize_pattern):
-	  URI::Generic.build should accept port as a string.
-	  pattern[:PORT] is not defined for long.
-	  by Dave Slutzkin <daveslutzkin@fastmail.fm>
-	  https://github.com/ruby/ruby/pull/804 fix GH-804
-
-Tue May 19 11:18:46 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* include/ruby/ruby.h (rb_data_typed_object_alloc),
-	  (rb_data_object_alloc): add old names for source level backward
-	  compatibilities.
-
-	* gc.c (rb_data_object_alloc, rb_data_typed_object_alloc): add
-	  aliases for binary level backward compatibilities.
-
-Tue May 19 09:54:44 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* include/ruby/ruby.h (Data_Make_Struct0): needs function pointer
-	  casts to fix function overloading in C++.
-
-Tue May 19 09:43:56 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* include/ruby/ruby.h (Data_Make_Struct0, TypedData_Make_Struct0):
-	  explicit cast from void* is necessary as implicit cast is
-	  disallowed in C++.
-
-Mon May 18 15:31:31 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* include/ruby/intern.h (rb_f_notimplement): should not respond to
-	  not-implemented methods.  as the address inside a DLL and the
-	  imported address are different on Windows, use an exported
-	  variable to share the same address.
-
-Mon May 18 13:55:01 2015  Shugo Maeda  <shugo@ruby-lang.org>
-
-	* lib/monitor.rb (mon_try_enter, mon_enter): should reset @mon_count
-	  just in case the previous owner thread dies without mon_exit.
-	  [fix GH-874] Patch by @chrisberkhout
-
-Sun May 17 17:21:29 2015  Eric Wong  <e@80x24.org>
-
-	* lib/webrick/utils.rb (set_non_blocking): use IO#nonblock=
-	* (set_close_on_exec): use IO#close_on_exec=
-	  [Feature #11136]
-
-Sun May 17 15:01:26 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* numeric.c (num_positive_p, num_negative_p): add methods
-	  Numeric#positive? and Numeric#negative?.
-	  [ruby-core:69173] [Feature #11151]
-
-	* numeric.c (flo_positive_p, flo_negative_p): specialized
-	  functions for Float.
-
-	* complex.c (Init_Complex): Complex do not have positive? and
-	  negative? methods
-
-Sun May 17 14:57:42 2015  Eric Wong  <e@80x24.org>
-
-	* lib/webrick/server.rb (accept_client): avoid redundant fcntl call
-	  [Feature #11137]
-
-Sun May 17 12:13:33 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/init.c (cloexec_accept): support nonblock flag and
-	  use SOCK_NONBLOCK if possible
-	* ext/socket/init.c (rsock_s_accept_nonblock):
-	  update cloexec_accept call
-	* ext/socket/init.c (accept_blocking): ditto for blocking
-	* test/socket/test_nonblock.rb: check nonblock? on accepted socket
-	  [Feature #11138]
-
-Sun May 17 03:58:59 2015  Aaron Patterson <tenderlove@ruby-lang.org>
-
-	* load.c (loaded_feature_path): stop returning false negatives for
-	  filenames which are trailing substrings of file extensions.  For
-	  example, 'b', which a trailing substring of ".rb" should not return
-	  false. [Bug #11155][ruby-core:69206]
-
-	* test/ruby/test_autoload.rb: test for fix
-
-Sat May 16 21:41:24 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* string.c: added documentation for character sequence \' with String#sub
-	  [Bug #11132][ruby-core:69121][fix GH-900][ci skip] Patch by @shishir127
-
-Sat May 16 21:38:05 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* enum.c: fix a sample code. Patch by @eagletmt
-	  [fix GH-901][ci skip]
-
-Sat May 16 21:17:11 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* gc.c (rb_data_object_wrap, rb_data_typed_object_wrap): rename
-	  alloc as wrap.  these functions do not allocate data pointers
-	  but just wrap the given pointers.
-
-Sat May 16 19:59:24 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* win32/win32.c (rb_w32_accept): simplified.
-
-Fri May 15 18:28:20 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* array.c (rb_ary_assoc, rb_ary_rassoc): [DOC] the result when key
-	  was found is the existing element, not a new array.  reported by
-	  Giau Nguyen <giaunv AT nustechnology.com>.
-
-Fri May 15 08:24:28 2015  Takeyuki FUJIOKA  <xibbar@ruby-lang.org>
-
-	* lib/cgi/cookie.rb: Implement HttpOnly flag for cookies.
-	  [fix GH-887] Patch by @martinpovolny
-
-Fri May 15 06:54:19 2015  Aaron Patterson <tenderlove@ruby-lang.org>
-
-	* variable.c: Change autoload to call `require` through Ruby rather
-	  than directly calling `rb_require_safe`.  This allows things like
-	  RubyGems to intercept file loading done though `autoload`.
-	  [Feature #11140]
-
-	* test/ruby/test_autoload.rb: Test for change.
-
-Wed Apr  8 19:18:02 2015  Shota Fukumori (sora_h)  <her@sorah.jp>
-
-	* enum.c (enum_grep_v, grep_i, grep_iter_i, Init_enum):
-	  Implement Enumerable#grep_v. [Feature #11049]
-
-Thu May 14 15:54:13 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* ext/pathname/lib/pathname.rb: Remove condition of RUBY_VERSION <= 1.9.
-	  [Feature #11082]
-
-Wed May 13 17:10:37 2015  Masaki Matsushita <glass.saga@gmail.com>
-
-	* enum.c (enum_to_a): revert r50457.
-	  it requires recursion check.
-	  then, it doesn't make performance improvement.
-	  [Bug #11130] [Feature #9118]
-
-Wed May 13 11:13:40 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* parse.y (parse_gvar): separate message for gvar without
-	  non-space characters from message for invalid identifiers.
-
-Tue May 12 22:18:27 2015  Masaki Matsushita <glass.saga@gmail.com>
-
-	* enum.c (enum_to_a): fix incompatibility introduced in r50457.
-	  [Bug #11130]
-
-	* test/ruby/test_enum.rb: test for above.
-
-Tue May 12 17:08:03 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* method.h: remove unused declaration.
-
-Mon May 11 10:58:45 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* gems/bundled_gems: Update minitest-5.6.1 and power_assert-0.2.3.
-
-Mon May 11 00:20:31 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* include/ruby/ruby.h (Data_Make_Struct, TypedData_Make_Struct):
-	  allocate wrapper data object before allocating DATA_PTR to get
-	  rid of possible memory leak when the former failed.
-
-Sun May 10 21:32:45 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* gc.c (gc_mark_children): call dmark function for non-NULL
-	  pointers only, so that DATA_PTR can be NULL safely now.
-
-Sun May 10 16:23:58 2015  Kazuki Tsujimoto  <kazuki@callcc.net>
-
-	* proc.c (proc_binding): fix segmentation fault on marking phase.
-	  envptr of newenvval should not be NULL.
-
-	  You can reproduce by
-	   make test-all TESTS='--gc-stress -n test_to_proc_binding ruby/test_method.rb'
-
-Sun May 10 12:41:18 2015  Masaki Matsushita <glass.saga@gmail.com>
-
-	* ext/zlib/zlib.c (rb_gzreader_external_encoding):
-	  define GzipReader#external_encoding.
-	  [Bug #10900]
-
-	* test/zlib/test_zlib.rb: test for above.
-
-Sun May 10 11:57:48 2015  Masaki Matsushita <glass.saga@gmail.com>
-
-	* ext/win32ole/win32ole_variant.c: fix typo "indicies".
-	  the patch is from davydovanton <antondavydov.o at gmail.com>.
-	  [fix GH-892]
-
-	* lib/rubygems/indexer.rb: ditto.
-
-	* test/rubygems/test_gem_indexer.rb: ditto.
-
-Sun May 10 11:44:37 2015  Masaki Matsushita <glass.saga@gmail.com>
-
-	* string.c (rb_str_crypt): Raise ArgumentError when
-	  string passed to String#crypt contains null.
-	  the patch is from jrusnack <jrusnack at redhat.com>.
-	  [Bug #10988] [fix GH-853]
-
-	* test/ruby/test_string.rb: test for above.
-
-Sun May 10 11:23:03 2015  Masaki Matsushita <glass.saga@gmail.com>
-
-	* enum.c (enum_to_a): Use size to set array capa when possible.
-	  the patch is from HonoreDB <aweiner at mdsol.com>.
-	  [fix GH-444]
-
-Sat May  9 06:48:36 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/ancdata.c (bsock_recvmsg_internal): GC guard
-	  [Bug #11123]
-
-Fri May  8 22:57:24 2015  takiy33  <takiy33@gmail.com>
-
-	* test/matrix/test_matrix.rb (test_determinant): refactor test on
-	  Matrix#determinant, by merging with test_det for an alias method
-	  det.  [Fix GH-897]
-
-Fri May  8 15:43:11 2015  Shugo Maeda  <shugo@ruby-lang.org>
-
-	* lib/net/imap.rb (body_ext_mpart): should work even if body-fld-dsp
-	  is omitted.  [ruby-core:69093] [Bug #11128]
-
-Fri May  8 15:05:57 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* doc/syntax/control_expressions.rdoc: fix a missing "a"
-	  [fix GH-888][ci skip] Patch by @riffraff
-
-Fri May  8 12:11:33 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* vm_eval.c (rb_method_call_status): resolve refined method entry
-	  to check if undefined.  [ruby-core:69064] [Bug #11117]
-
-Thu May  7 22:22:59 2015  Sho Hashimoto  <sho-h@ruby-lang.org>
-
-	* proc.c: [DOC] fix Binding#local_variable_set example. [ci skip]
-
-Thu May  7 11:32:57 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* Makefile.in (rbconfig.rb): add rule to make.
-
-Thu May  7 05:14:39 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/lib/socket.rb (connect_nonblock): use IO#wait_writable
-	* lib/drb/drb.rb (DRB::DRbTCPSocket#alive?): use IO#wait_readable
-	* lib/webrick/httpserver.rb (run): ditto
-	* lib/resolv.rb (request): ditto for single socket case
-	  [ruby-core:68943] [Feature #11081]
-
-Wed May  6 22:49:54 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* vm_eval.c (rb_method_call_status): undefined refined method is
-	  not callable unless using.  [ruby-core:69064] [Bug #11117]
-
-Sun May  3 22:40:06 2015  Rei Odaira  <Rei.Odaira@gmail.com>
-
-	* ext/-test-/file/fs.c: need to include sys/statvfs.h
-	  to use statvfs().
-
-	* ext/-test-/file/extconf.rb: check the existence of
-	  sys/statvfs.h
-
-Sun May  3 21:59:48 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* lib/yaml.rb: fix typo. [ci skip][fix GH-890]
-	  Patch by @miketheman
-
-Sun May  3 10:02:12 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* range.c (linear_object_p, range_include): test if covered for
-	  linear objects.  [ruby-core:69052] [Bug #11113]
-
-Fri May  1 13:30:24 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dln.c (dln_load): check if a different libruby is loaded by the
-	  extension library, and then bail out to get rid of very frequent
-	  reported stale bug reports.
-
-Thu Apr 30 19:51:11 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* compile.c (iseq_compile_each): revert r46873 and r46875, not to
-	  allow to execute private readers by pretending op assign.
-	  [ruby-core:68984] [Bug #11096]
-
-Thu Apr 30 17:02:33 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* rational.c: Added documentation for rational literal.
-	  [Bug #11075][fix GH-885][ci skip] Patch by @shishir127
-
-Thu Apr 30 16:39:44 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/socket/ipsocket.c (init_inetsock_internal): preserve errno
-	  before other library calls and use rb_syserr_fail.
-	  [ruby-core:68531] [Bug #10975]
-
-Thu Apr 30 16:22:16 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* parse.y (lambda): push and reset cmdarg_stack in lambda body.
-	  [ruby-core:69017] [Bug #11107]
-
-Sun Apr 26 07:36:48 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* enc/utf_8.c (code_to_mbclen, code_to_mbc): reject values larger
-	  than UTF-8 max codepoints.  [Feature #11094]
-
-Sat Apr 25 14:26:19 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* string.c (str_buf_cat): expand later so that the buffer can be
-	  larger for further use.  [Bug #11080] [Bug #11095]
-
-Fri Apr 24 23:48:45 2015  Akinori MUSHA  <knu@iDaemons.org>
-
-	* misc/ruby-electric.el: Import version 2.2.3 from
-	  https://github.com/knu/ruby-electric.el.
-
-Fri Apr 24 10:40:02 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* win32/win32.c (rb_w32_{getc,putc}): removed.  they are needed for old
-	  ruby (before 1.8), but not now.
-
-Fri Apr 24 08:40:13 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* win32/win32.c: remove bcc related code.
-
-	* include/ruby/win32.h: ditto.
-
-Fri Apr 24 08:21:07 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* win32/win32.c (rb_acrt_lowio_lock_fh): wrap _pioinfo(i)->lock.
-
-	* win32/win32.c (rb_acrt_lowio_unlock_fh): ditto.
-
-Fri Apr 24 06:47:19 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* win32/win32.c (_filbuf): msvc14 doesn't have it, use _fgetc_nolock.
-
-	* win32/win32.c (_flsbuf): msvc14 doesn't have it, use _fputc_nolock.
-
-	* win32/win32.c (vcruntime_file): define vcruntime_file on msvc14
-	  because it doesn't export FILE's internal structure.
-
-	* win32/win32.c (FILE_COUNT): added to abstract FILE->_cnt.
-
-	* win32/win32.c (FILE_READPTR): added to abstract FILE->_ptr.
-
-	* win32/win32.c (FILE_FILENO): added to abstract FILE->_file.
-
-	* win32/win32.c (init_stdhandle): use FILE_FILENO.
-
-	* win32/win32.c (rb_w32_getc): use FILE_COUNT and FILE_READPTR.
-
-	* win32/win32.c (rb_w32_putc): ditto.
-
-Fri Apr 24 06:37:07 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* win32/win32.c (dupfd): use _set_osfhnd.
-
-	* win32/win32.c (rb_w32_wopen): use _set_osflags.
-
-Thu Apr 24 05:38:01 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (gc_mark_roots): fox to work PRINT_ROOT_TICKS.
-
-Fri Apr 24 04:49:05 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* win32/Makefile.sub: MSVC14 have struct timespec.
-
-	* win32/rtname.cmd: support vcruntime140.dll.
-
-	* time.c (localtime_with_gmtoff_zone): MSVC14 doesn't have tzname and
-	  daylight but have _tzname and _daylight.
-
-Thu Apr 23 11:35:55 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* vm_eval.c (rb_obj_instance_eval, rb_obj_instance_exec): allow
-	  symbols to just instance_eval/exec, except for definition of
-	  singletons.  [ruby-core:68961] [Bug #11086]
-
-Thu Apr 23 10:01:36 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* lib/delegate.rb: fix a typo.
-	  [fix GH-881][ci skip] Patch by @Zorbash
-
-Wed Apr 22 18:36:50 2015  Shugo Maeda  <shugo@ruby-lang.org>
-
-	* lib/net/imap.rb (move, uid_move): support the MOVE command defined
-	  in RFC6851.  Patch by ojab ojab.
-	  [ruby-core:68960] [Feature #11077]
-
-Tue Apr 22 12:42:12 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* test/ruby/test_object.rb: add tests for Kernel#String and Kernel#Array.
-	  [fix GH-879][fix GH-880] Patch by @yui-knk
-
-Tue Apr 21 20:46:02 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* test/ruby/test_object.rb: renamed tests to explicitly class name.
-	  [fix GH-877] Patch by @yui-knk
-
-Tue Apr 21 05:31:00 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/lib/socket.rb (connect_internal): avoid common exceptions
-	  from connect_nonblock. [ruby-core:68909]
-
-Mon Apr 20 23:46:53 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* win32/win32.c (rb_w32_wreadlink): follow the official format of
-	  REPARSE_DATA_BUFFER structure.
-
-Mon Apr 20 20:23:04 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* common.mk ($(arch)-fake.rb): revert r50354 because bsdmake seems not
-	  to handle such substitution.
-
-	* tool/expand-config.rb: convert path separators here.
-
-Mon Apr 20 16:52:20 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/fake.rb: don't fake libdir.  use libdirname instead.
-
-Mon Apr 20 16:49:52 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* lib/mkmf.rb (MakeMakefile#configuration): DESTDIR should never affect
-	  top_srcdir and builddir.
-
-Mon Apr 20 16:18:17 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* common.mk ($(arch)-fake.rb): fix the path separator up for Windows.
-
-Mon Apr 20 15:02:47 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* win32/win32.c (rb_w32_wreadlink): fixed a bug that a junction misses
-	  its drive letter.
-
-Mon Apr 20 12:54:56 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* ext/openssl/*: use license instead of licence.
-	  [fix GH-876][ci skip] Patch by @davydovanton
-	* lib/net/https.rb: ditto.
-
-Mon Apr 20 12:42:40 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* benchmark/bm_so_meteor_contest.rb: fix a typo.
-	  [fix GH-876][ci skip] Patch by @davydovanton
-	* tool/bisect.sh: ditto.
-	* tool/update-deps: ditto.
-
-Mon Apr 20 11:10:46 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/socket.c (sock_connect_nonblock): do not raise EISCONN
-	  [ruby-core:68926] [Feature #11072]
-	* test/socket/test_nonblock.rb: check non-EISCONN on 2nd connect
-
-Sun Apr 19 12:19:17 2015  Chad Brewbaker  <crb002@gmail.com>
-
-	* ext/{etc,openssl,tk}: Adding parens and comparisons around
-	  assignments to get rid of Wparentheses warnings.  [Fix GH-875]
-
-Sun Apr 19 10:42:54 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* hash.c (get_env_cstr): environment variables must be ASCII
-	  compatible, as dummy encodings and wide char encodings are
-	  unsupported now.
-
-Sat Apr 18 15:18:56 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/json/parser/parser.rl: raise with messages in UTF-8
-	  encoding.  [ruby-core:67386] [Bug #10705]
-
-Fri Apr 17 11:58:34 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* string.c (STR_SET_EMBED): clear NOFREE flag at embedding as
-	  embedded strings no longer refer static strings.
-	  [ruby-core:68436] [Bug #10942]
-
-Thu Apr 16 05:15:50 2015  Eric Wong  <e@80x24.org>
-
-	* NEWS: note IO#wait_readable change in r50263
-
-Thu Apr 16 05:09:36 2015  Eric Wong  <e@80x24.org>
-
-	* lib/net/protocol.rb (rbuf_fill): use IO#wait_*able
-	* lib/net/http/generic_request.rb (wait_for_continue): ditto
-	  [ruby-core:68891] [Feature #11056]
-
-Wed Apr 15 18:43:43 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_trace.c (rb_tracepoint_new): fix documentation.
-	  Commented by @emilsoman.
-
-Wed Apr 15 17:36:51 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_trace.c (rb_tracepoint_new): Add documentation for
-	  rb_tracepoint_new C level API [ci skip]
-	  Provided by @emilsoman. [fix GH-869]
-
-Wed Apr 15 10:37:40 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
-
-	* doc/contributors.rdoc: fix a typo. Patch by @davydovanton
-	  [fix GH-872][ci skip]
-	* doc/syntax/methods.rdoc: ditto.
-	* ext/digest/sha2/sha2.c: ditto.
-	* ext/socket/ipsocket.c: ditto.
-	* ext/tk/*: ditto.
-
-Wed Apr 15 07:51:23 2015  Yuki Yugui Sonoda  <yugui@yugui.jp>
-
-	* doc/extension.ja.rdoc: Added description of TypedData_XXX.
-	  Deprecated the old DATA_XXX.
-	  Reviewed by ko1 and nobu.
-	  Fixes [ruby-dev:40881] #3064
-
-	* doc/extension.rdoc: ditto.
-
-Wed Apr 15 07:34:49 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* thread_pthread.c (reserve_stack): keep sp safe zone to get rid
-	  of crash by -fstack-check.  [ruby-core:68740] [Bug #11030]
-
-Tue Apr 14 16:03:49 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/merger.rb (versionup): should also increment revision when
-	  changing teeny.
-
-Tue Apr 14 11:24:56 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/-test-/printf/printf.c (uint_to_str): renamed to get rid of
-	  conflict on cygwin.  [ruby-core:68877] [Bug #11065]
-
-Tue Apr 14 08:59:04 2015  Zachary Scott  <e@zzak.io>
-
-	* gc.c: [DOC] Improve documentation for ObjectSpace.count_objects
-	  with regards to `:TOTAL` key, with patch by @schneems [Fixes GH-871]
-	  https://github.com/ruby/ruby/pull/871 [Bug #11067]
-
-Mon Apr 13 22:44:07 2015  Tanaka Akira  <akr@fsij.org>
-
-	* test/lib/envutil.rb (File.mkfifo): Defined using mkfifo command.
-
-	* test/ruby/test_io.rb: Use File.mkfifo.
-
-	* test/ruby/test_file_exhaustive.rb: Ditto.
-
-	* test/ruby/test_process.rb: Ditto.
-
-Mon Apr 13 21:20:20 2015  CHIKANAGA Tomoyuki  <nagachika@ruby-lang.org>
-
-	* ext/openssl/lib/openssl/ssl.rb: stricter hostname verification
-	  following RFC 6125. with the patch provided by Tony Arcieri and
-	  Hiroshi Nakamura [ruby-core:61545] [Bug #9644]
-	* test/openssl/test_ssl.rb: add tests for above.
-
-Sun Apr 12 18:40:04 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/json/json.gemspec: bump version to 1.8.2.
-	* ext/json/lib/json/version.rb: ditto.
-
-Sun Apr 12 18:12:07 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/json/json.gemspec, lib/rdoc/rdoc.gemspec: added gemspec directly.
-	* defs/default_gems, tool/rbinstall.rb: removed default_gems definition.
-	  it make simple installation for default gems.
-
-Sun Apr 12 17:35:17 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/json/*, test/json/*: Reverted r50231.  Because it's not
-	  working with cross-compile environment.
-
-Sun Apr 12 15:34:59 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* parse.y (arg): fix segfault by null caused by syntax error.
-	  [ruby-core:68851] [Bug #10957]
-
-Sun Apr 12 15:11:16 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/rubygems/test_case.rb: use explicitly exception class and reverted
-	  to require JSON library for rubygems tests with Ruby 2.2.0 or earlier.
-
-Sun Apr 12 15:10:18 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/io/wait/wait.c (io_wait_readable): simply returns that IO is
-	  readable without blocking, but no longer returns EOF.
-
-	* ext/io/wait/wait.c (io_ready_p, io_wait_readable): try polling
-	  first and check FIONREAD optionally to see if EOF.
-	  [ruby-core:36805] [Feature #4849]
-
-Sun Apr 12 14:53:23 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/rubygems/test_case.rb: fixed json load error for rubygems tests.
-
-Sun Apr 12 14:13:28 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* gc.c: Document require name for ObjectSpace methods.
-	  [ci skip][fix GH-860] Patch by @schneems
-
-Sun Apr 12 13:54:05 2015  Tanaka Akira  <akr@fsij.org>
-
-	* test/ruby/test_io.rb: New test that open(fifo) doesn't block other
-	  threads.
-
-Sun Apr 12 13:52:18 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/coverage/coverage.c: Remove extension from require argument.
-	  [ci skip][fix GH-870] Patch by @yui-knk
-
-Sun Apr 12 10:29:14 2015  Eric Wong  <e@80x24.org>
-
-	* ext/openssl/ossl_ssl.c (ossl_ssl_connect_nonblock):
-	  support `exception: false'
-	* (get_no_exception): move function location
-	* ext/socket/socket.c (sock_connect_nonblock):
-	  support `exception: false'
-	* test/openssl/test_pair.rb (test_connect_accept_nonblock_no_exception):
-	  test `exception: false' on connect,
-	  rename from `test_accept_nonblock_no_exception'
-	* test/socket/test_nonblock.rb (test_connect_nonblock_no_exception):
-	  new test
-
-Sun Apr 12 09:57:16 2015  Tanaka Akira  <akr@fsij.org>
-
-	* test/ruby/test_file_exhaustive.rb: Test a block device on GNU/Linux.
-
-Sun Apr 12 09:24:03 2015  Tanaka Akira  <akr@fsij.org>
-
-	* test/ruby/test_file_exhaustive.rb: Test a file not owned.
-
-Sun Apr 12 09:05:44 2015  Tanaka Akira  <akr@fsij.org>
-
-	* ext/fiddle/depend: Fix "Wrong mix of special targets" error with
-	  OpenBSD make.
-
-Sun Apr 12 09:04:37 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* test/ruby/test_file_exhaustive.rb: Windows doesn't support Unix file
-	  modes.
-
-Sun Apr 12 08:56:44 2015  Tanaka Akira  <akr@fsij.org>
-
-	* ext/-test-/file/fs.c: OpenBSD needs sys/param.h before sys/mount.h.
-
-Sun Apr 12 08:52:01 2015  Tanaka Akira  <akr@fsij.org>
-
-	* test/ruby/test_file_exhaustive.rb: Test suid, sgid and sticky file.
-
-Sat Apr 11 23:48:30 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* template/fake.rb.in: Don't assign baseruby, Because it's affect to
-	  Makefile of native gem like json on bundled gems.
-
-Sat Apr 11 23:33:22 2015  Tanaka Akira  <akr@fsij.org>
-
-	* file.c (rb_f_test): Consider nsec for "=", "<" and ">" for "test"
-	  method.
-
-Sat Apr 11 23:26:05 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* tool/rbinstall.rb: support destdir for native extension gem.
-
-Sat Apr 11 21:02:06 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* test/ruby/test_file_exhaustive.rb
-	  (TestFileExhaustive#test_stat_socket_p): r50226 accidentally missed
-	  the guard for non-unix environments.
-
-Sat Apr 11 20:14:21 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/json/*, test/json/*, defs/default_gems: Gemify JSON library.
-	  [fix GH-867][Feature #11057]
-	* test/ruby/test_extlibs.rb: removed json gem from existence extensions.
-	* gems/bundled_gems: added json gem into bundled gem.
-	* lib/rdoc/rubygems_hook.rb: ignored no json environment.
-	* lib/rubygems/test_case.rb, test/rubygems/*: ditto.
-	* lib/rdoc/test_case.rb, test/rdoc/*: ditto.
-
-Sat Apr 11 15:56:58 2015  Tanaka Akira  <akr@fsij.org>
-
-	* test/ruby/test_file_exhaustive.rb: Create sample files lazily.
-
-Sat Apr 11 14:03:47 2015  Tanaka Akira  <akr@fsij.org>
-
-	* test/ruby/test_file_exhaustive.rb: Test character device using
-	  /dev/null.
-
-Sat Apr 11 10:59:58 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* lib/mkmf.rb (append_cppflags, append_cflags, append_ldflags):
-	  utility methods to append compiler options.
-
-Sat Apr 11 08:22:24 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/rdoc/text.rb: removed duplicated code.
-
-Sat Apr 11 04:46:42 2015  Eric Wong  <e@80x24.org>
-
-	* lib/net/protocol.rb (rbuf_fill): avoid exception with read_nonblock
-	  [ruby-core:68787] [Feature #11044]
-
-Fri Apr 10 23:57:44 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (need_normalization): use getattrlist() if fgetattrlist()
-	  is unavailable, on OSX 10.5.  [ruby-core:68829] [Bug #11054]
-
-Fri Apr 10 22:29:21 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* lib/mkmf.rb (try_compile): pass the given werror flag to try_do
-	  to check if stderr is empty.
-
-	* lib/mkmf.rb (try_cflags, try_ldflags): default werror to true.
-
-	* win32/Makefile.sub (WERRORFLAG): remove useless option.  VC does
-	  not make warnings of unknown command option an error.
-
-Fri Apr 10 19:34:24 2015  Tanaka Akira  <akr@fsij.org>
-
-	* test/ruby/test_file_exhaustive.rb: Test socket.
-
-Fri Apr 10 19:38:46 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* test/objspace/test_objspace.rb: remove debug prints.
-
-Fri Apr 10 19:35:51 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* ext/objspace/objspace.c: add ObjectSpace.count_imemo_objects method
-	  to count imemo objects for each type.
-
-	* test/objspace/test_objspace.rb: add a test.
-
-	* NEWS: describe about this addition.
-
-Fri Apr 10 19:34:24 2015  Tanaka Akira  <akr@fsij.org>
-
-	* test/ruby/test_file_exhaustive.rb: Test anonymous pipe.
-
-Fri Apr 10 19:31:56 2015  Tanaka Akira  <akr@fsij.org>
-
-	* test/ruby/test_file_exhaustive.rb: Test named pipe.
-
-Fri Apr 10 19:10:34 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* ext/objspace/objspace.c (setup_hash): unify common routine.
-
-Fri Apr 10 18:29:49 2015  Tanaka Akira  <akr@fsij.org>
-
-	* process.c (rb_execarg_parent_start1): Handle EINTR.
-
-Fri Apr 10 17:27:58 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm.c (vm_exec): check other events when RETURN is thrown.
-	  [Bug #10724]
-
-	* test/ruby/test_settracefunc.rb: add a test.
-
-Fri Apr 10 11:44:09 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/date/extconf.rb: check warnings.
-
-	* lib/mkmf.rb (try_cflags): pass options to try_compile.
-
-	* win32/Makefile.sub (WERRORFLAG): make unknown command line
-	  options an error.
-
-Fri Apr 10 08:00:17 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* test/ruby/test_process.rb: unfortunately, windows is not POSIX...
-	  cygwin has mkfifo command, but it does not affect system-wide.
-
-Fri Apr 10 02:18:53 2015  Tanaka Akira  <akr@fsij.org>
-
-	* test/ruby/test_process.rb: Use mkfifo command instead of mknod
-	  command to create a named pipe.  mkfifo command is defined by POSIX.
-
-Fri Apr 10 01:29:05 2015  Tanaka Akira  <akr@fsij.org>
-
-	* process.c: Release GVL when opening a file in spawn() to avoid whole
-	  process blocking when opening a named pipe.
-	  (open_func): New function.
-	  (rb_execarg_parent_start1): Extracted from rb_execarg_parent_start and
-	  use rb_thread_call_without_gvl2 to release GVL when opening a file.
-	  (rb_execarg_parent_start): Invoke rb_execarg_parent_start1 via
-	  rb_protect and invoke rb_execarg_parent_end when error.
-
-Thu Apr  9 22:19:19 2015  Tanaka Akira  <akr@fsij.org>
-
-	* process.c (redirect_open): Removed.
-
-Thu Apr  9 21:38:20 2015  Tanaka Akira  <akr@fsij.org>
-
-	* internal.h (rb_execarg_parent_end): Declared.
-
-	* process.c: "spawn" opens files in the parent process.
-	  (check_exec_redirect): Add an placeholder for fd in parameters
-	  for fd_open.
-	  (check_exec_fds_1): Delete fd_open condition.
-	  (check_exec_fds): Don't call check_exec_fds_1 with fd_open.
-	  (rb_execarg_parent_start): Open files specified as "spawn" options
-	  and add "dup2" options.
-	  (rb_execarg_parent_end): New function to close opened fds.
-	  (run_exec_open): Removed.
-	  (rb_execarg_run_options): Don't call run_exec_open.
-	  (rb_spawn_internal): Call rb_execarg_parent_end.
-
-	* io.c (pipe_open): Call rb_execarg_parent_end.
-
-	* ext/pty/pty.c (establishShell): Call rb_execarg_parent_end.
-
-Thu Apr  9 20:52:31 2015  Tanaka Akira  <akr@fsij.org>
-
-	* internal.h (rb_execarg_parent_start): Renamed from rb_execarg_fixup.
-
-	* process.c: Follows the above change.
-
-	* io.c: Ditto.
-
-	* ext/pty/pty.c: Ditto.
-
-Thu Apr  9 20:35:12 2015  Tanaka Akira  <akr@fsij.org>
-
-	* process.c (fd_clear_cloexec): Extracted from run_exec_dup2.
-
-Thu Apr  9 09:26:47 2015  Eric Wong  <e@80x24.org>
-
-	* ccan/list/list.h: sync with ccan upstream
-	  [ccan commit c2fbfe5282ba264f3485586e7efa8a5967f2d386]
-
-Thu Apr  9 08:24:03 2015  Masahiro Tomita  <tommy@tmtm.org>
-
-	* ext/socket/raddrinfo.c (addrinfo_mload): fix memory leak of
-	  addrinfo.  [ruby-dev:48923] [Bug #11051]
-
-Wed Apr  8 17:45:02 2015  Shannon Skipper  <shannonskipper@gmail.com>
-
-	* version.c (Init_version): the version of the engine or
-	  interpreter.  [Fix GH-858]
-
-Wed Apr  8 16:15:30 2015  Kenta Murata  <mrkn@cookpad.com>
-
-	* bigdecimal: conform to ruby's license.  [ruby-core:68466] [Bug #10952]
-
-Wed Apr  8 14:57:06 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* win32/win32.c (rb_w32_wreadlink): should treat junctions like as
-	  symlinks.
-
-Wed Apr  8 14:03:47 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* test/ruby/test_symbol.rb: fix syntax error.
-
-Wed Apr  8 13:01:06 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* hash.c (rb_any_hash): Symbols are compared by the identities
-	  always.  [ruby-core:68767] [Bug #11035]
-
-Tue Apr  7 10:22:51 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* internal.h: fix typo. Patch by @sferik [fix GH-865]
-
-Mon Apr  6 22:52:35 2015  Tanaka Akira  <akr@fsij.org>
-
-	* enum.c: Enumerable#chunk and Enumerable#slice_before no longer takes
-	  the initial_state argument.  [Feature #10958]
-
-Mon Apr  6 16:09:58 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_args.c: protect value stack from calling other methods
-	  during complex parameter setting process (splat, kw, and so on).
-	  [Bug #11027]
-
-	* vm_core.h: remove rb_thread_t::mark_stack_len.
-	  With this modification, we don't need to use th->mark_stack_len.
-
-	* test/ruby/test_keyword.rb: add a test.
-
-	* cont.c (cont_capture): catch up this fix.
-
-	* vm.c (rb_thread_mark): ditto.
-
-Mon Apr  6 11:26:42 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* tool/downloader.rb (http_options): prevent content auto decoding
-	  because this is a downloader.
-
-Sun Apr  5 09:55:18 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* doc/contributing.rdoc: update Maintainers list.
-
-Sun Apr  5 09:11:00 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* tool/rbinstall.rb: fix bin script permission of bundled gems.
-
-Sun Apr  5 08:46:08 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* tool/rbinstall.rb: support --program-suffix option.
-
-Sat Apr  4 21:31:18 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/rake/*: Gemify rake [fix GH-862][Feature #11025]
-	* test/rake/*: ditto.
-	* tool/rbinstall.rb: ditto.
-
-Sat Apr  4 11:30:24 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* string.c (rb_str_setbyte): check the argument first not to
-	  discard shared string and code range unnecessarily until
-	  actually changing the contents.  pointed out by headius.
-
-Sat Apr  4 08:16:43 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* lib/net/http.rb (edit_path): use path which is absolute ftp url
-	  on using ftp_proxy.
-
-Fri Apr  3 11:43:17 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* vm_eval.c (vm_call0_cfunc): update invoker arguments.
-
-	* vm_insnhelper.c (vm_call_cfunc_latter): ditto.
-
-	* vm_insnhelper.c (rb_vm_call_cfunc_push_frame): ditto, and prefix
-	  with rb_.
-
-Thu Apr  2 16:26:59 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* common.mk, tool/mkconfig.rb: check the running ruby version in
-	  rbconfig.rb with the program version, as RUBY_VERSION has never
-	  been affected by --with-ruby-version option.
-	  [ruby-core:68639] [Bug #11002]
-
-	* configure.in (LIBRUBY_DLDFLAGS): compatibility_version must be
-	  valid version numbers, not an arbitrary string.
-
-Wed Apr  1 11:09:15 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (push_glob): remove indirect links of arguments for
-	  trampoline.
-
-Wed Apr  1 09:59:12 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* lib/fileutils.rb (FileUtils#mv): show the exact target path in
-	  the error message instead of the destination parent directory
-	  name.  patched by Joao Britto <jabcalves AT gmail.com> at
-	  [ruby-core:68706].  [Bug #11021]
-
-Tue Mar 31 15:25:07 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* doc/ChangeLog-0.06_to_0.52: added archived Changelog.
-	  [ruby-list:50105]
-	* doc/ChangeLog-0.50_to_0.60: ditto.
-	* doc/ChangeLog-0.60_to_1.1: ditto.
-
-Mon Mar 30 22:02:55 2015  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
-
-	* README.EXT.ja: add redirect [ruby-core:68631]
-
-Mon Mar 30 14:42:41 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* win32/win32.c (fileattr_to_unixmode, winnt_lstat): deal with
-	  symbolic link than directory, and set executable bits.
-
-Mon Mar 30 11:27:54 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* io.c (copy_stream_body): use the arguments without conversion if
-	  having read, readpartial, and write methods, than conversion by
-	  to_path method.  [ruby-core:68676] [Bug #11015]
-
-Sun Mar 29 21:08:37 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* gc.c (objspace_allrefs_destruct_i): fix a typo.
-	  [Bug #11013]
-
-Sun Mar 29 11:51:32 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* proc.c (proc_binding): replicate env from method object, and
-	  allocate the local variable area for the iseq local table.
-	  [ruby-core:68673] [Bug #11012]
-
-Sat Mar 28 09:19:41 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* ext/date/extconf.rb: try_cflags("-std=iso9899:1999") [Bug #10906]
-	  ruby itself (including numeric.c) is built with strict compile
-	  options including -std=iso9899:1999, but ext/date is not.
-	  By the way -std=iso9899:1999 is not only a warning option but also
-	  changes behavior like MACRO definitions for example INFINITY.
-	  gcc on Solaris affect this.
-
-Fri Mar 27 16:34:16 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* common.mk: revert using BOOTSTRAPRUBY for enc.mk, as
-	  enc/depend uses CONFIG.  [ruby-core:68647] [Bug #11004]
-
-Thu Mar 26 10:05:13 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* test/test_observer.rb: add tests for Observable module.
-	  [fix GH-859] Patch by @brightbits
-
-Thu Mar 26 06:35:10 2015  Eric Wong  <e@80x24.org>
-
-	* README.EXT: add redirect [ruby-core:68631]
-
-Wed Mar 25 16:46:49 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* ext/socket/extconf.rb: Solaris 11 has struct tcp_info.tcpi_ca_state,
-	  but it is a dummy.
-
-	* ext/socket/option.c: Solaris 11 doesn't have u_intN_t.
-
-	* ext/socket/option.c: Solaris 11 needs inspect_tcpi_msec.
-
-	* ext/socket/raddrinfo.c: Solaris 11 has AF_PACKET but doesn't have
-	  related macros.
-
-Wed Mar 25 17:03:08 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/-test-/file/fs.c (get_fsname): try magic number only if
-	  f_type is included.  [ruby-dev:48913] [Bug #11000]
-
-Wed Mar 25 11:20:40 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* benchmark/bm_hash_aref_flo.rb: make more realistic data.
-	  [ruby-core:68632] [[Bug #10999]
-
-Wed Mar 25 10:39:06 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* .document: removed needless entries.
-
-Wed Mar 25 08:07:28 2015  Eric Wong  <e@80x24.org>
-
-	* doc/extension.rdoc: fix spelling of filename
-	* doc/extension.ja.rdoc: ditto.
-
-Tue Mar 25 06:55:43 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* complex.c (k_inexact_p, k_exact_zero_p): use k_exact_zero_p macro
-	  to remove k_inexact_p macro.
-
-	* complex.c (k_exact_one_p): remove unused macro k_exact_one_p.
-
-Tue Mar 24 22:23:33 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* doc/extention.rdoc: move from toplevel document and added extname.
-	* doc/extention.ja.rdoc: ditto.
-
-Tue Mar 24 22:06:58 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* doc/standard_library.rdoc: strip.
-
-Tue Mar 24 22:06:27 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* doc/standard_library.rdoc: move Thread to Extensions.
-
-Tue Mar 24 21:59:10 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* doc/contributing.rdoc: update Maintainers list.
-
-Tue Mar 24 19:10:24 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (gc_writebarrier_generational): fix messages for rb_bug().
-	  Remove `rb_' prefix.
-
-	* gc.c (gc_writebarrier_incremental): ditto.
-
-Tue Mar 24 17:34:01 2015  Shugo Maeda  <shugo@ruby-lang.org>
-
-	* README.ja.md: should be chunibyo.
-
-Tue Mar 24 17:30:12 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/-test-/file/fs.c (get_fsname): return filesystem name by
-	  statfs/statvfs.  [ruby-core:68624] [Bug #10998]
-
-Tue Mar 24 16:46:02 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/redmine-backporter.rb: now doesn't required spaces just after
-	  `!`.
-
-Mon Mar 23 23:18:27 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (dir_close): don't raise on double close for consistent to
-	  IO#close.  [Feature #10950]
-
-Mon Mar 23 21:22:07 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* win32/file.c (rb_readlink): move from file.c for better buffer
-	  allocation and the result encoding.
-
-	* win32/win32.c (wreadlink, rb_w32_ureadlink): implement readlink().
-
-Mon Mar 23 14:40:45 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* win32/win32.c (winnt_stat): stat with following symbolic links.
-
-	* win32/win32.c (winnt_lstat): rename old winnt_stat, which does
-	  not follow symbolic links.
-
-Mon Mar 23 01:44:35 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* marshal.c (r_symreal): register symbol names as strings first so
-	  that r_symlink always returns valid names.
-	  [ruby-core:68587] [Bug #10991]
-
-	* marshal.c (r_ivar, r_object0): now need to intern symbol names.
-
-	* marshal.c (r_object0): compare with symbol names.
-
-Sun Mar 22 22:07:40 2015  Kouhei Sutou  <kou@cozmixng.org>
-
-	* doc/etc.rd.ja: Fix wrong coding for Emacs.
-
-Sun Mar 22 09:53:15 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* tool/make-snapshot (package): add default CONFIGURE name to
-	  follow r50039.
-
-	* tool/make-snapshot (package): substitute configuration variables
-	  in Makefile.in instead of passing by the command line, and make
-	  temporary Makefile instead of a pipe.
-
-Sun Mar 22 08:09:47 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* common.mk (ext/ripper/ripper.c, ext/rbconfig/sizeof/sizes.c):
-	  strip autogenerated dependencies which have invalid syntax in
-	  other than nmake.
-
-Sat Mar 21 15:01:26 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/io/console/console.c (console_set_winsize): use handle for
-	  writing.  GetConsoleScreenBufferInfo seems failing on a handle
-	  for reading.
-
-	* io.c: [DOC] update the example of IO#winsize to use $stdout
-	  instead of $stdin, which does not work on Windows.  a patch by
-	  Jan Lelis <mail AT janlelis.de> at [ruby-core:68574].
-	  [Bug #10986]
-
-Fri Mar 20 18:41:03 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* proc.c (respond_to_missing_p): check if the receiver responds to
-	  the given method by respond_to_missing?.
-
-	* proc.c (mnew_missing): create Method object for method_missing.
-	  [ruby-core:68564] [Bug #10985]
-
-Fri Mar 20 17:43:18 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* .travis.yml: enabled email notification.
-
-Fri Mar 20 17:39:52 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* .travis.yml: removed Ruby 1.9.3 build on Travis CI
-
-Fri Mar 20 12:38:36 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (obj_info): obj_info() can receive internal objects.
-
-	* gc.c (check_rvalue_consistency): obj_info() returns const char *.
-
-Fri Mar 20 12:14:37 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (obj_info): show class name and T_DATA type_name.
-
-Thu Mar 19 22:12:46 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (rb_copy_wb_protected_attribute): `dest' can be WB unprotected.
-
-Thu Mar 19 21:25:25 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (rb_copy_wb_protected_attribute): demote `dest' object.
-
-Thu Mar 19 16:18:00 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c, internal.h: export rb_gc_verify_internal_consistency().
-
-Thu Mar 19 16:15:24 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (obj_info): show allocation site if GC_DEBUG is not 0.
-
-Thu Mar 19 16:12:01 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (newobj_of): fix RGENGC_OLD_NEWOBJ_CHECK logics.
-	  * skip on incremental marking because not sure what happen :p
-	  * rb_gc_writebarrier_remember() is enough to mark children.
-
-Thu Mar 19 16:08:42 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (rb_copy_wb_protected_attribute): need demote for old objects.
-
-Thu Mar 19 10:31:00 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* random.c (fill_random_bytes): release the handle in the static
-	  variable, not a local variable.
-
-Thu Mar 19 06:30:35 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* object.c (rb_obj_clone): do not touch age (FL_PROMOTED[01]) because
-	  rb_obj_alloc() can return old object in debug.
-
-Thu Mar 19 06:29:28 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* test/objspace/test_objspace.rb: flag name was changed
-	  (long_lived -> uncollectible).
-
-Thu Mar 19 05:30:13 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* iseq.c (iseq_mark): skip some marking if iseq->orig is available.
-
-	* iseq.c (rb_iseq_clone): need WB for iseq1->klass = iseq0->klass
-	  (done in MEMCPY).
-
-Thu Mar 19 04:55:53 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* internal.h (IMEMO_DEBUG): added.
-
-	* internal.h: remove unused FL_IMEMO_MARK_V[0-3].
-
-	* gc.c (rb_imemo_new_debug): added.
-
-	* gc.c (obj_info): show imemo type name.
-
-Thu Mar 19 04:52:26 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (RGENGC_OLD_NEWOBJ_CHECK): add check mechanism.
-
-	  If RGENGC_OLD_NEWOBJ_CHECK > 0, then create old objects
-	  (not new objects) periodically.
-
-	  Create one old objects per RGENGC_OLD_NEWOBJ_CHECK objects are
-	  created.
-
-Thu Mar 19 04:46:36 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* enum.c (enum_sort_by): add WBs.
-
-Thu Mar 19 03:37:52 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (check_rvalue_consistency): refactoring.
-	  * not inline on RGENGC_CHECK_MODE > 0.
-	  * check SPECIAL_CONST_P(obj) first.
-	  * add a check that remembered_bit is only TRUE when old (age == 3).
-
-	* gc.c (RVALUE_DEMOTE): should clear RVALUE_REMEMBERED bit.
-
-	  remembered_bit should be TRUE only for old (age == 3) objects.
-
-	  Actually there are no effect because demoted objects will be
-	  uncollectible WB unprotected objects (marked at the beginning of
-	  every minor GC).
-
-Thu Mar 19 02:52:48 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c: rename terminologies.
-	  * long_lived -> uncollectible:
-	    because this bitmap does not mean "long lived objects in past",
-	    but means "prohibit collection these objects until next major GC".
-
-	    Uncollectible objects consist of two types objects, one is old
-	    objects (WB protected objects which age == 3) and another is
-	    uncollectible WB unprotected objects which are referred from old
-	    objects
-
-	  * remembered_wb_unprotected_objects ->
-	    uncollectible_wb_unprotected_objects:
-	    because uncollectible objects does not mean remembered objects.
-
-Wed Mar 18 17:21:12 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (gc_writebarrier_generational): add an alternative write
-	  barrier (WB) implementation.
-	  When finding reference from [Old obj] to [New obj] by WB, current
-	  implementation marks [Old obj] as remembered old objects and marks
-	  children of [Old obj] at the beginning of marking.
-
-	  Added (but disabled) code changes current behaviour. This fix promote
-	  [New obj] to old and marks as a remembered old object. We can assume
-	  "new objects referred from old objects are maybe long-lived old
-	  objects".
-
-	  Disadvantage of added algorithm is we may promote unwilling
-	  short-lived objects. For example, consider many new objects push and
-	  pop to an old stack object. All of new objects (short-lived objects)
-	  promote to old objects unexpectedly.
-
-	  To compare these behaviour, I add this new code (but disabled it).
-
-Wed Mar 18 17:14:39 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (RVALUE_PROMOTE_RAW): rename to RVALUE_OLD_LONG_LIVED_SET()
-	  to make clear.
-
-Wed Mar 18 17:10:01 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (check_rvalue_consistency): do not need to check is_sweeping().
-
-Wed Mar 18 14:13:22 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* benchmark/bm_vm1_gc_wb_ary.rb: run GC to finish "marking" phase.
-
-	* benchmark/bm_vm1_gc_wb_obj.rb: ditto.
-
-	* benchmark/bm_vm1_gc_wb_ary_promoted.rb: add parameter
-	  full_mark: false to invoke only minor GC.
-
-	* benchmark/bm_vm1_gc_wb_obj_promoted.rb: ditto.
-
-Wed Mar 18 12:07:36 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* string.c: add a comment about RSTRING_FSTR.
-
-Wed Mar 18 12:01:53 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* hash.c (rb_any_hash): use same hash values with Float#hash so
-	  that -0.0 and +0.0 will be identical.
-	  [ruby-core:68541] [Bug #10979]
-
-Wed Mar 18 05:34:32 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* string.c: introduce STR_FAKESTR to show string is FAKESTR or not.
-
-	* string.c (STR_SET_SHARED): ignore FAKESTR because only Ruby objects
-	  can use write barrier.
-
-Tue Mar 17 18:59:16 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* include/ruby/ruby.h: use rb_gc_writebrrier() simply.
-	  For incremental GC, we need to get a pointer to the objspace.
-	  We can share this pointer for the following WB process.
-	  And considering icache hit ratio, process in the GC.
-
-	* gc.c (rb_gc_writebarrier): added.
-
-	* gc.c (gc_writebarrier_generational, gc_writebarrier_incremental):
-	  make them NOINLINE because inlining them into rb_gc_writebarrier()
-	  makes a prologue code of rb_gc_writebarrier() longer (storing callee
-	  save registers).
-
-	  This patch improve the performance of WB on micro-benchmarks.
-
-	  name                   ruby 2.1   trunk   modified
-	  vm1_gc_wb_ary*            0.511   0.632      0.532
-	  vm1_gc_wb_ary_promoted*   0.578   0.701      0.674
-	  vm1_gc_wb_obj*            0.419   0.575      0.492
-	  vm1_gc_wb_obj_promoted*   0.537   0.664      0.618
-	                                                 (sec)
-
-Tue Mar 17 18:51:43 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* benchmark/bm_vm1_gc_wb_ary(_promoted).rb: separate fastpath and
-	  slowpath for WB.
-
-	  Before this change bm_vm1_gc_wb_ary.rb tried to check the performance
-	  for WB slowpath (making a reference from oldobj to newobj). However,
-	  from Ruby 2.2, 3 GCs are needed to promote new objects because
-	  only 3 age objects are promoted objects.
-
-	  To compare fastpath and slowpath, introduce new "promoted" version
-	  benchmark.
-
-	  bm_vm1_gc_wb_ary.rb is for fastpath and
-	  bm_vm1_gc_wb_ary_promoted.rb is for slowpath.
-
-	* benchmark/bm_vm1_gc_wb_obj(_promoted).rb: ditto.
-
-Tue Mar 17 17:23:11 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (glob_helper): distinguish not-yet-stated and DT_UNKNOWN
-	  by readdir, and traverse recursively for the former.  Linux
-	  readdir returns DT_UNKNOWN on some filesystems, e.g., smbfs,
-	  iso9660.
-
-Mon Mar 16 17:43:21 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/webrick/server.rb: Fix regression bug in WEBrick's
-	  :DoNotReverseLookup config option implementation.
-	  [fix GH-731] Patch by @vais
-	* test/webrick/test_do_not_reverse_lookup.rb: ditto.
-
-Sat Mar 14 20:05:23 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* math.c (math_gamma): optimization for passed small integer.
-
-Sat Mar 14 18:07:23 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* enum.c: [DOC] Fixes Enumerable#member? documentation
-	  [fix GH-756][ci skip] Patch by @shamanime
-
-Sat Mar 14 12:23:53 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (glob_helper): use d_type to reduce lstat system calls.
-
-	* win32/dir.h (struct direct): add d_type instead of d_isdir and
-	  d_isrep.  SYMLINKD is unreliable, since the target can be
-	  replaced after a link was created.
-
-	* win32/win32.c (readdir_internal): set d_type.
-
-Sat Mar 14 02:14:50 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* parse.y (primary): empty parentheses at cmdarg can be null.
-	  [ruby-core:68477] [Bug #10957]
-
-Fri Mar 13 15:04:36 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/stringio/stringio.c (strio_close): don't raise on double
-	  close for consistent to IO#close.
-
-Fri Mar 13 15:03:20 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* io.c (rb_io_close_read, rb_io_close_write): don't raise after
-	  close same as IO#close.
-
-Fri Mar 13 12:29:07 2015  Tanaka Akira  <akr@fsij.org>
-
-	* test/readline/test_readline.rb: Restore environment variables:
-	  COLUMNS LINES
-
-Fri Mar 13 11:37:46 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/fiddle/extconf.rb: needs --enable-shared when linked to
-	  libruby or fiddle.so.  since --with-static-linked-ext does no
-	  longer link extensions to ruby program with --enable-shared, the
-	  only combination needs --enable-static is --disable-shared and
-	  --with-static-linked-ext.  [ruby-dev:48901] [Bug #10960]
-
-Fri Mar 13 07:02:20 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/init.c (rsock_s_accept_nonblock): use rb_hash_lookup2
-	* ext/openssl/ossl_ssl.c (get_no_exception): new function
-	  (ossl_ssl_accept_nonblock): use get_no_exception
-	  (ossl_ssl_read_internal): ditto
-	  (ossl_ssl_write_nonblock): ditto
-	  [ruby-core:68511]
-
-Fri Mar 13 07:01:38 2015  Eric Wong  <e@80x24.org>
-
-	* ext/openssl/ossl_ssl.c: predefine wait_*able symbols
-
-Thu Mar 12 22:59:53 2015  Tanaka Akira  <akr@fsij.org>
-
-	* test/lib/leakchecker.rb: Check environment variables.
-
-Thu Mar 12 05:54:27 2015  Eric Wong  <e@80x24.org>
-
-	* ext/socket/init.c (rsock_s_accept_nonblock):
-	  support exception: false
-	  [ruby-core:66385] [Feature #10532]
-	* ext/socket/init.c (rsock_init_socket_init): define new symbols
-	* ext/socket/rubysocket.h: adjust prototype
-	* ext/socket/socket.c (sock_accept_nonblock): support exception: false
-	* ext/openssl/ossl_ssl.c (ossl_ssl_accept_nonblock): ditto
-	* ext/socket/socket.c (Init_socket): adjust accept_nonblock definition
-	* ext/openssl/ossl_ssl.c (Init_ossl_ssl): ditto
-	* ext/socket/tcpserver.c (rsock_init_tcpserver): ditto
-	* ext/socket/unixserver.c (rsock_init_unixserver): ditto
-	* ext/socket/tcpserver.c (tcp_accept_nonblock): adjust
-	  rsock_s_accept_nonblock call
-	* ext/socket/unixserver.c (unix_accept_nonblock): ditto
-	* ext/openssl/ossl_ssl.c (ossl_start_ssl): support no_exception
-	* ext/openssl/ossl_ssl.c (ossl_ssl_connect): adjust ossl_start_ssl call
-	* ext/openssl/ossl_ssl.c (ossl_ssl_connect_nonblock): ditto
-	* ext/openssl/ossl_ssl.c (ossl_ssl_accept): ditto
-	* test/socket/test_nonblock.rb (test_accept_nonblock): test for
-	  "exception :false"
-	* test/socket/test_tcp.rb (test_accept_nonblock): new test
-	* test/socket/test_unix.rb (test_accept_nonblock): ditto
-	* test/openssl/test_pair.rb (test_accept_nonblock_no_exception): ditto
-
-Thu Mar 12 10:53:06 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* internal.h, node.h: move a definition of `struct rb_global_entry'
-	  and related functions from node.h to internal.h.
-
-	* variable.c: remove unused include pragma.
-
-	* common.mk: remove unused dependency.
-
-Thu Mar 12 10:32:39 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* common.mk: remove unused dependency.
-
-Thu Mar 12 08:20:14 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* load.c: removed unused header file "node.h".
-
-	* method.h: ditto.
-
-	* symbol.c: ditto.
-
-Thu Mar 12 08:14:48 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c: RGENGC_CHECK_MODE should be 0.
-
-Thu Mar 12 07:44:17 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* internal.h: use T_IMEMO to represent `struct MEMO' value.
-	  memo->v1 and memo->v2 is WB protected values.
-	  So use MEMO_V1/V2_SET() macros to set these values.
-	  memo->u3 is ambiguous (sometimes a VALUE, sometimes an integer
-	  value), so use gc_mark_maybe() in gc.c to mark it.
-
-	  Rename NEW_MEMO() to MEMO_NEW().
-
-	  Move MEMO_FOR and NEW_MEMO_FOR macros from node.h.
-
-	  Export a rb_imemo_new() function for ext/ripper.
-
-	* node.h: remove NODE_MEMO.
-
-	* enum.c: catch up these change.
-
-	* enumerator.c: ditto.
-
-	* load.c: ditto.
-
-	* ext/objspace/objspace.c (count_nodes): ditto.
-
-	* gc.c (gc_mark_children): mark imemo_memo type.
-
-	* parse.y (new_args_gen): use T_IMEMO.
-	  (I'm not sure it is working correctly...)
-
-Wed Mar 11 22:36:34 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* eval.c (frame_called_id): it should use vm_ifunc type.
-
-	* eval.c (frame_func_id): ditto.
-
-Wed Mar 11 22:27:05 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* node.h: remove NODE_IFUNC, NEW_IFUNC.
-
-	* internal.h: use T_IMEMO for IFUNC.
-
-	  rename `struct IFUNC' to `struct vm_ifunc' and move the definition
-	  from vm_insnhelper.h. Add imemo_ifunc.
-
-	* gc.c (gc_mark_children): mark imemo_ifunc type T_IMEMO object.
-
-	* compile.c: catch up these changes.
-
-	* proc.c: ditto.
-
-	* vm_core.h (RUBY_VM_IFUNC_P): ditto.
-
-	* vm_eval.c (rb_iterate): ditto.
-
-	* vm_insnhelper.c: ditto.
-
-	* ext/objspace/objspace.c: ditto.
-
-Wed Mar 11 21:53:43 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* internal.h, eval_intern.h: move CREF accessors.
-
-	  List IMEMO supported types in internal.h.
-
-Wed Mar 11 21:45:36 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.h: use T_IMEMO to create THROW_DATA.
-
-	  Add THROW_DATA_NEW().
-
-	* internal.h: move definition of `struct THROW_DATA'
-	  from vm_insnhelper.h to internal.h.
-
-	  Rename `THROW_DATA' to `vm_throw_data'.
-
-	* eval_intern.h (THROW_DATA_P): move to internal.h.
-	  THROW_DATA is no longer T_NODE, so check T_IMEMO.
-
-	* gc.c (gc_mark_children): mark THROW_DATA.
-
-	* vm.c: catch up these changes.
-
-	* vm_eval.c: ditto.
-
-	* vm_insnhelper.c: ditto.
-
-Wed Mar 11 21:21:56 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.c: use T_IMEMO to create SVAR.
-
-	* internal.h, vm_insnhelper.h: move definition `struct SVAR'
-	  from vm_insnhelper.h to internal.h. And rename it to struct vm_svar.
-
-	  new imemo_type imemo_svar is added.
-
-	* gc.c (gc_mark_children): mark imemo_svar.
-
-	* node.c (rb_gc_mark_node): remove useless marking.
-
-Wed Mar 11 19:35:46 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* include/ruby/ruby.h: introduce new type T_IMEMO.
-	  T_IMEMO is Internal Memo type, internal use only.
-	  T_IMEMO has same purpose of NODE_MEMO.
-
-	  To insert T_IMEMO, type numbers are modified a little.
-
-	* internal.h: define struct RIMemo. Each RIMemo objects
-	  has imemo_type. We can observe it by the imemo_type() function.
-
-	* gc.c (rb_imemo_new): added.
-
-	* node.h: remove NODE_CREF and NEW_CREF().
-
-	* node.c (rb_gc_mark_node): ditto.
-
-	* vm.c (vm_cref_new): use rb_imem_new().
-
-	* vm_eval.c: ditto.
-
-	* vm_insnhelper.c: use RIMemo objects for CREF.
-
-	* ext/objspace/objspace.c: support T_IMEMO.
-
-Wed Mar 11 17:03:20 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c: fix memory leak by prepend method.
-
-	  It is easy to reproduce with such script:
-
-	    module M; def bar; end; end
-	    loop{
-	      Class.new do
-	        def foo; end
-	        prepend M
-	      end
-	    }
-
-	* gc.c (obj_free): free T_ICLASS::m_tbl if it is created by prepend.
-	  To recognize it, check RICLASS_IS_ORIGIN flag.
-
-	* gc.c (gc_mark_children): T_ICLASS objects only need to mark
-	  T_ICLASS::m_tbl if RICLASS_IS_ORIGIN is set.
-
-	* gc.c (obj_memsize_of): count T_ICLASS if RICLASS_IS_ORIGIN is set.
-
-	* internal.h (RCLASS_SET_ORIGIN): add to set RCLASS_SET_ORIGIN.
-
-	  TODO: The word `origin' seems not good name. We need to invent
-	  another good name.
-
-	* class.c: use RCLASS_SET_ORIGIN().
-
-	* class.c (class_alloc): zero clear rb_classext_t.
-
-Wed Mar 11 13:28:49 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* configure.in: check also procstat_getvmmap, which is not
-	  available on FreeBSD 9.  [ruby-core:68468] [Bug #10954]
-
-	* vm_dump.c (procstat_vm): use kinfo_getvmmap instead if
-	  procstat_getvmmap is not available.
-
-Wed Mar 11 09:15:21 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* internal.h: define struct MEMO.
-
-	* enum.c: use MEMO.
-
-	* enumerator.c: ditto.
-
-	* load.c: ditto.
-
-	* node.h: return (struct MEMO *) pointer.
-
-Wed Mar 11 06:26:21 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.h (THROW_DATA_STATE): return int, not VALUE.
-
-	* vm_insnhelper.h (THROW_DATA_STATE_SET): accept int value.
-
-Wed Mar 11 05:06:46 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_eval.c (rb_catch_protect): use THROW_DATA_VAL().
-
-Wed Mar 11 04:56:04 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.h: define struct IFUNC.
-
-	* vm_eval.c (rb_iterate): use it.
-
-	* vm_insnhelper.c (vm_yield_with_cfunc): ditto.
-
-Wed Mar 11 03:52:12 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* eval_intern.h (THROW_DATA_P): use RB_TYPE_P() instead of
-	  BUILTIN_TYPE().
-
-	* thread.c (thread_join): use THROW_DATA_P().
-
-Wed Mar 11 03:48:01 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* proc.c: use RUBY_VM_IFUNC_P() to recognize IFUNC or not.
-
-	* vm.c: ditto.
-
-	* vm_dump.c: ditto.
-
-	* vm_insnhelper.c: ditto.
-
-	* vm_core.h (RUBY_VM_IFUNC_P): use RB_TYPE_P() instead of
-	  BUILTIN_TYPE().
-
-Wed Mar 11 03:21:37 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.h: define struct THROW_DATA to represent
-	  throwing data. Also define accessor functions.
-
-	* eval_intern.h: move related changes into vm_insnhelper.h.
-	  Now these MACROs (functions) are only used in vm*.c.
-
-	  There is only THROW_DATA_P(err) to check this data type or not.
-
-	* vm.c: catch up these changes.
-
-	* vm_eval.c: ditto.
-
-	* vm_insnhelper.c: ditto.
-
-Wed Mar 11 00:57:00 2015  Rei Odaira  <Rei.Odaira@gmail.com>
-
-	* test/rubygems/test_gem_security_trust_dir.rb: The return value of
-	  File::Stat#mode is OS dependent. In AIX, 0200000 is set.
-
-Tue Mar 10 20:03:41 2015  Tanaka Akira  <akr@fsij.org>
-
-	* lib/webrick/server.rb: Invoke setup_shutdown_pipe in start method
-	  instead of listen method.
-	  [ruby-core:68476] [Bug #10956] Reported by Shintaro Kojima.
-
-Tue Mar 10 17:27:27 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* thread.c (thread_join): Fixnum (except TAG_FATAL) and
-	  NODE should not be reached here.
-
-Mon Mar  9 21:42:10 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.c (ep_cref): rename to lep_cref() because it should be
-	  local ep.
-
-Mon Mar  9 16:34:36 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/stringio/stringio.c (strio_close): don't raise on double
-	  close for consistent to IO#close.
-
-Mon Mar 09 06:44:48 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.h: define struct SVAR for SVAR.
-	  This data type is also same layout of NODE (NODE_IF).
-
-	* vm_insnhelper.c: catch up this change.
-
-Mon Mar  9 06:43:21 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.c (lep_svar_set): add WBs.
-
-Mon Mar  9 06:19:06 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* internal.h: define rb_cref_t and change to use it.
-
-	  rb_cref_t is data type of CREF. Now, the body is still NODE.
-	  It is easy to understand what is CREF and what is pure NODE.
-
-Mon Mar  9 06:00:37 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.h (COPY_CREF_OMOD): fix translation miss.
-
-Mon Mar  9 04:47:58 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* internal.h: define CREF accessor macros.
-	  * CREF_CLASS(cref)
-	  * CREF_NEXT(cref)
-	  * CREF_VISI(cref)
-	  * CREF_VISI_SET(cref, v)
-	  * CREF_REFINEMENTS(cref)
-	  * CREF_PUSHED_BY_EVAL(cref)
-	  * CREF_PUSHED_BY_EVAL_SET(cref)
-	  * CREF_OMOD_SHARED(cref)
-	  * CREF_OMOD_SHARED_SET(cref)
-	  * CREF_OMOD_SHARED_UNSET(cref)
-
-	  This is process to change CREF data type from NODE.
-
-Sun Mar  8 22:50:57 2015  Tanaka Akira  <akr@fsij.org>
-
-	* ext/zlib/zlib.c (rb_gzfile_close): Don't raise on double
-	  close for consistent to IO#close.
-
-Sun Mar  8 16:57:35 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (glob_helper): match patterns against legacy short names
-	  too, not only ordinary names.  [ruby-core:67954] [Bug #10819]
-
-	* win32/dir.h (struct direct): add short name members.
-
-	* win32/win32.c (opendir_internal, readdir_internal): ditto.
-
-Sat Mar  7 09:36:05 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* array.c: document that first element is kept when using
-	  Array#uniq and #uniq! [fix GH-845][ci skip]
-	  Patch by @riffraff
-
-Sat Mar  7 09:28:02 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* thread.c: Mutex#owned? is no longer experimental since 2.1.0
-	  [fix GH-839][ci skip] Patch by @takiy33
-
-Sat Mar  7 09:18:42 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* tool/merger.rb: Added documentation to version method.
-	  [fix GH-847][ci skip] Patch by @magikid
-
-Fri Mar  6 22:50:36 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* class.c (rb_prepend_module): need a WB for klass -> origin.
-
-Fri Mar  6 20:18:38 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* fix namespace issue on singleton class expressions. [Bug #10943]
-
-	* vm_core.h, method.h: remove rb_iseq_t::cref_stack. CREF is stored
-	  to rb_method_definition_t::body.iseq_body.cref.
-
-	* vm_insnhelper.c: modify SVAR usage.
-	  When calling ISEQ type method, push CREF information onto method
-	  frame, SVAR located place. Before this fix, SVAR is simply nil.
-	  After this patch, CREF (or NULL == Qfalse for not iseq methods)
-	  is stored at the method invocation.
-
-	  When SVAR is required, then put NODE_IF onto SVAR location,
-	  and NDOE_IF::nd_reserved points CREF itself.
-
-	* vm.c (vm_cref_new, vm_cref_dump, vm_cref_new_toplevel): added.
-
-	* vm_insnhelper.c (vm_push_frame): accept CREF.
-
-	* method.h, vm_method.c (rb_add_method_iseq): added. This function
-	  accepts iseq and CREF.
-
-	* class.c (clone_method): use rb_add_method_iseq().
-
-	* gc.c (mark_method_entry): mark method_entry::body.iseq_body.cref.
-
-	* iseq.c: remove CREF related codes.
-
-	* insns.def (getinlinecache/setinlinecache): CREF should be cache key
-	  because a different CREF has a different namespace.
-
-	* node.c (rb_gc_mark_node): mark NODE_IF::nd_reserved for SVAR.
-
-	* proc.c: catch up changes.
-
-	* struct.c: ditto.
-
-	* insns.def: ditto.
-
-	* vm_args.c (raise_argument_error): ditto.
-
-	* vm_eval.c: ditto.
-
-	* test/ruby/test_class.rb: add a test.
-
-Fri Mar  6 18:19:13 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* test/webrick/test_filehandler.rb: on vboxsf (on VirtualBox
-	  on Windows 7), file name and permissions are strange (can access
-	  by short file name and so on).
-
-	  Simply skip on such tests on such FS. To detect strange FS, this
-	  patch use a part of code `File.executable?(__FILE__)`.
-	  Please correct them if there are better ways.
-
-Fri Mar  6 17:31:29 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* test/ruby/test_beginendblock.rb: do not change directory.
-
-	  Run system command in the directory mounted by vboxsf on Windows 7
-	  and get warning like that "warning: Insecure world writable dir...".
-
-Fri Mar  6 10:31:00 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* vm_eval.c (vm_call_super): search next super class from the
-	  original class, to get rid of infinite recursion with
-	  prepending.  a patch by Seiei Higa <hanachin AT gmail.com> at
-	  [ruby-core:68434].  [ruby-core:68093] [Bug #10847]
-
-Fri Mar  6 08:45:26 2015  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
-
-	* lib/matrix.rb: Add Vector#round. Patch by Jordan Stephens.
-	  [Fixes GH-802]
-
-Fri Mar  6 07:33:03 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (obj_info): show node name too.
-
-Fri Mar  6 07:00:44 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* internal.h: remove struct method_table_wrapper.
-	  struct method_table_wrapper was introduced to avoid duplicate marking
-	  for method tables.
-
-	  For example, `module M1; def foo; end; end` make one method table
-	  (mtbl) contains a method `foo`. M1 (T_MODULE) points mtbl.
-	  Classes C1 and C2 includes M1, then two T_ICLASS objects are created
-	  and they points mtbl too. In this case, three objects (one T_MODULE
-	  and two T_ICLASS objects) points same mtbl. On marking phase, these
-	  three objects mark same mtbl. To avoid such duplication, struct
-	  method_table_wrapper was introduced.
-
-	  However, created two T_ICLASS objects have same or shorter lifetime
-	  than M1 (T_MODULE) object. So that we only need to mark mtbl from M1,
-	  not from T_ICLASS objects. This patch tries marking only from M1.
-	  In other words, original module (M1) has responsibility to mark mtbl.
-	  Because of no duplicate marking, we don't need method_table_wrapper
-	  any more.
-
-	  Note that one `Module#prepend` call creates two T_ICLASS objects.
-	  One for referring to a prepending Module object, same as
-	  `Module#include`. We don't need to care this T_ICLASS.
-	  One for moving original mtbl from a prepending class. We need to
-	  mark such mtbl from this T_ICLASS object. To mark the mtbl,
-	  we need to use `RCLASS_ORIGIN(klass)` on marking from a prepended
-	  class `klass`.
-
-	* class.c: ditto.
-
-	* eval.c (rb_using_refinement): ditto.
-
-	* gc.c: ditto.
-
-	* include/ruby/ruby.h: define m_tbl directly. The definition of
-	  struct RClass should be moved to (srcdir)/internal.h.
-
-	* method.h: remove decl of rb_free_m_tbl_wrapper().
-
-	* object.c: use RCLASS_M_TBL() directly.
-
-Fri Mar  6 02:50:12 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* dir.c (replace_real_basename): need to check the return value of
-	  GLOB_REALLOC().
-
-Fri Mar  6 02:26:03 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* dir.c (replace_real_basename): shouldn't create Ruby object before
-	  the object system is loaded.
-	  [ruby-core:68430] [Bug #10941]
-
-Wed Mar  5 16:58:43 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* hash.c: [DOC] #delete method actually returns nil, if the key
-	  is not found. [fix GH-844][ci skip] Patch by @ivdma
-
-Wed Mar  5 12:22:23 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* math.c: refactoring: remove unnecessary variable d0 to unify code
-	  appearance.
-
-Thu Mar  5 11:50:54 2015  Shugo Maeda  <shugo@ruby-lang.org>
-
-	* vm_eval.c (eval_string_with_cref): A binding should keep
-	  refinements activation information and the refinements should be
-	  activated in subsequent eval calls with the binding.
-	  [ruby-core:67945] [Bug #10818]
-
-Thu Mar  5 11:16:55 2015  Shugo Maeda  <shugo@ruby-lang.org>
-
-	* test/ruby/test_refinement.rb: There is no need anymore to suppress
-	  warnings.
-
-Thu Mar  5 08:31:02 2015  Rei Odaira  <Rei.Odaira@gmail.com>
-
-	* random.c (random_raw_seed): Avoid calling fill_random_bytes()
-	  if the requested size is 0. AIX returns -1 for 0-byte read from
-	  /dev/urandom, while other UNIX returns 0. With this change,
-	  Random.raw_seed(0) consistently returns "" in any UNIX.
-
-Wed Mar  4 12:43:32 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* test/ruby/test_math.rb (assert_float_and_int): Refactor test cases
-	  by introducing assert_float_and_int. [misc #10810]
-
-Wed Mar  4 11:52:30 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* symbol.c (Init_sym): make dsym_fstrs a hash compared by identity
-	  as the keys are unique fstrings, to get rid of running hash and
-	  compare methods and causing new object allocation during garbage
-	  collection phase.  [ruby-dev:48891] [Bug #10933]
-
-Wed Mar  4 10:16:57 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* enum.c: Fix typo in slice_after's exception message.
-	  [fix GH-842][ci skip] Patch by @jsyeo
-
-Wed Mar  4 10:15:37 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* doc/syntax/methods.rdoc: add some missing spaces and
-	  fix a grammatical error in method docs.
-	  [fix GH-843][ci skip] Patch by @nikolas
-
-Wed Mar  4 02:13:06 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/redmine-backporter.rb (backport_command_string): pick up only
-	  when the revision exists in trunk.
-
-Wed Mar  4 00:44:56 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* thread.c (rb_thread_io_blocking_region): assigned variables
-	  inside EXEC_TAG() should be volatile.
-
-	* thread.c (rb_thread_s_handle_interrupt): ditto.
-
-	* thread.c (exec_recursive): ditto.
-
-Wed Mar  4 00:29:18 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/redmine-backporter.rb: now can specify shorten form of commands.
-
-Tue Mar  3 23:41:42 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/redmine-backporter.rb (Readline.readline): drop untreated control
-	  characters.
-
-Tue Mar  3 22:25:24 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* test/lib/envutil.rb (EnvUtil.invoke_ruby): need to rescue because
-	  Signal.signame may raise exception.
-
-Tue Mar  3 16:57:39 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/redmine-backporter.rb: use 'b' instead of 's' for showing
-	  Backport options for merger.rb.
-
-Tue Mar  3 16:55:23 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/redmine-backporter.rb: show selected ticket number at prompt.
-
-Tue Mar  3 14:47:30 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* math.c (num2dbl_with_to_f): direct casting from Rational to double.
-	  [Feature #10909]
-
-	* test/ruby/test_math.rb: add tests for the above change.
-
-Tue Mar  3 07:52:20 2015  Rei Odaira  <Rei.Odaira@gmail.com>
-
-	* test/ruby/test_symbol.rb: avoid a false positive in AIX.
-
-Tue Mar  3 00:59:39 2015  Naohisa Goto  <ngotogenome@gmail.com>
-
-	* configure.in: set PRELOADENV in Solaris to avoid "wrong ELF class"
-	  error. [Bug #10926] [ruby-dev:48888]
-	* configure.in: set LIBPATHENV for 32-bit compile in Solaris
-	  in addition to 64-bit.
-
-Mon Mar  2 15:36:10 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* configure.in: do not check _setjmp unless _longjmp is available,
-	  so that configure results will not be changed by cache.
-
-Mon Mar  2 14:44:56 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* configure.in (RUBY_REPLACE_TYPE): restore unsigned type from
-	  cached variable only if the target type is not available.
-
-Mon Mar  2 13:04:27 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* signal.c (sig_signame): return nil if the argument is a valid
-	  signal number.
-
-Mon Mar  2 12:05:04 2015  Naohisa Goto  <ngotogenome@gmail.com>
-
-	* test/net/ftp/test_ftp.rb (create_ftp_server): set SO_OOBINLINE
-	  for receiving OOB data which is sent with MSG_OOB flag in
-	  portable way. [Bug #10915] [ruby-dev:48885]
-	* test/net/ftp/test_ftp.rb (test_abort, test_status): use gets
-	  for receiving OOB data in portable way.
-
-Mon Mar  2 11:43:07 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* configure.in (RUBY_REPLACE_TYPE): restore unsigned type from
-	  cached variable.
-
-Mon Mar  2 06:01:41 2015  Eric Wong  <e@80x24.org>
-
-	* ext/io/wait/wait.c (io_nread): wrap return value with INT2FIX
-	  Thanks to Yura Sokolov <funny.falcon@gmail.com>
-	  [ruby-core:68369] [Bug#10923]
-	* test/io/wait/test_io_wait.rb (test_nread_buffered):
-	  fix broken test
-
-Sun Mar  1 20:21:16 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* configure.in (RUBY_REPLACE_TYPE): restore convertible type from
-	  cached variable, so that configured results will be stable.
-
-Sun Mar  1 18:10:34 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* configure.in (rb_cv_broken_memmem): check before adding the
-	  result HAVE_MEMMEM macro to confdefs.h, so that configured
-	  results will be stable.
-
-Sun Mar  1 11:17:56 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* gc.c (id2ref): prohibit from accessing internal objects.
-	  [ruby-core:68348] [Bug #10918]
-
-Sun Mar  1 09:06:11 2015  Tanaka Akira  <akr@fsij.org>
-
-	* lib/time.rb (strptime): Support %s.%N.
-	  [ruby-core:68301] [Bug #10904] Patch by Sadayuki Furuhashi.
-
-Sat Feb 28 17:18:39 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* enum.c (enum_each_slice, enum_each_cons): limit elements size by
-	  the enumerator size.  suggested by Hans Mackowiak <hanmac AT
-	  gmx.de> at [ruby-core:68335]
-
-Sat Feb 28 15:44:20 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* vm_dump.c (rb_vm_bugreport): get rid of making new strings
-	  inside signal context.
-
-	* variable.c (rb_tmp_class_path): defer making temporary class
-	  path string.
-
-	* variable.c (rb_search_class_path): search class path or return
-	  Qnil or Qfalse if unnamed, not creating a temporary path.
-
-Sat Feb 28 15:02:02 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* variable.c (rb_tmp_class_path): preserve name encoding of an
-	  anonymous instance of module/class subclass.
-
-Sat Feb 28 08:24:30 2015  Rei Odaira  <Rei.Odaira@gmail.com>
-
-	* ext/pty/pty.c: AIX supports autopush.
-	  Patch by Perry Smith [ruby-core:58539] [Bug #9144]
-
-Fri Feb 27 22:00:05 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/rubygems: Update to RubyGems 2.4.6 and HEAD(800f2e6).
-	  Fixed #1159, #1171, #1173 on rubygems/rubygems
-	* test/rubygems: ditto.
-
-Fri Feb 27 20:55:42 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/rake: Update to rake (9237e74), typo fix and remove needless
-	  private syntax.
-	* test/rake: ditto.
-
-Fri Feb 27 17:06:44 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_core.h: define vm_svar_index.
-
-	* vm_insnhelper.c, vm.c, compile.c: use vm_svar_index names.
-
-	* iseq.h: remove DEFAULT_SPECIAL_VAR_COUNT.
-	  use VM_SVAR_FLIPFLOP_START instead.
-
-Fri Feb 27 13:57:48 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* io.c (setup_narg): wipe away expanded part of buffer to get rid
-	  of revealing uncleaned data.  reported by Dongkwan Kim <dkay AT
-	  kaist.ac.kr>.
-
-Wed Feb 25 22:25:07 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* spec/default.mspec: use default configuration file name.
-	  https://github.com/ruby/rubyspec/commit/cc69f337b06362e5607ffa3e3ad40ef7494960cf
-
-Wed Feb 25 22:21:56 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* spec/default.mspec: remove specific version number.
-	  https://github.com/ruby/rubyspec/commit/7a909e925c1baa9c700bd44af9241aef6e596714
-
-Wed Feb 25 22:04:04 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* ext/win32/Win32API.rb (initialize): accept both a string and an array
-	  for the arguments of the imported function.
-	  reported by Aaron Stone [ruby-core:68208] [Bug #10876] [Fixes GH-835]
-
-Wed Feb 25 18:12:11 2015  Eric Wong  <e@80x24.org>
-
-	* signal.c (sighandler): preserve errno
-	  Patch by Steven Stewart-Gallus <sstewartgallus00@mylangara.bc.ca>
-	  [ruby-core:68172] [Bug #10866]
-
-Wed Feb 25 15:59:35 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (push_pattern, push_glob): make globbed file names same
-	  encoding to the given pattern.
-
-Wed Feb 25 15:27:16 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* tool/merger.rb: support 2.1+ versioning scheme.
-
-Tue Feb 25 08:49:12 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* lib/cmath.rb (log): raise ArgumentError when more than 2 arguments
-	  are passed. [ruby-core:66143] [Bug #10487]
-
-Tue Feb 25 02:15:17 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* test/ruby/test_math.rb: Use assert_infinity instead of assert_equal(1.0/0, ...).
-
-	* test/ruby/test_math.rb: Add tests for overriding Integer#to_f.
-	  [ruby-core:67919] [Misc #10809]
-
-Tue Feb 24 22:58:48 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* complex.c (nucomp_mul): calculate as rotation in complex plane
-	  if matrix calculation resulted in NaN.
-
-Tue Feb 24 21:45:39 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* test/ruby/test_math.rb(test_cbrt): Add an assertion for Math.cbrt(1.0/0)
-	  and move #test_cbrt to more proper place.
-
-Tue Feb 24 19:09:25 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* vm_insnhelper.c (lep_svar_place, lep_svar_get): do not create
-	  additional T_NODE object (svars holder) when only getting
-	  svars.
-
-Tue Feb 24 11:49:48 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* time.c (time_zone_name): should be US-ASCII only if all 7-bits,
-	  otherwise locale encoding.  [ruby-core:68230] [Bug #10887]
-
-Tue Feb 24 09:47:07 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* string.c (chompped_length): enable smart chomp for all non-dummy
-	  encoding strings, not only default_rs.
-	  [ruby-core:68258] [Bug #10893]
-
-Mon Feb 23 23:19:42 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* tool/vcs.rb (IO.popen): support :chdir option.
-
-	* tool/vcs.rb (VCS::GIT.get_revisions): use :chdir option instead
-	  of -C option which is not supported by older git.
-	  [ruby-dev:48880] [Bug #10890]
-
-Mon Feb 23 15:26:39 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* string.c (rb_str_split_m): raise ArgumentError at broken string
-	  not RegexpError, as Regexp is not involved in.
-	  [ruby-core:68229] [Bug #10886]
-
-Mon Feb 23 07:25:29 2015  Benoit Daloze  <eregontp@gmail.com>
-
-	* time.c: Zone encoding should be US-ASCII if all 7-bits. Fix r46907.
-
-	* test/ruby/test_time.rb, test/ruby/test_time_tz.rb: Update tests.
-
-Sun Feb 22 18:33:42 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* common.mk: use ruby organization for rubyspec.
-
-Sun Feb 22 15:56:06 2015  Kazuki Tsujimoto  <kazuki@callcc.net>
-
-	* vm_insnhelper.c (rb_vm_rewrite_cref_stack): copy nd_refinements
-	  of original crefs. It fixes segmentation fault when calling
-	  refined method in duplicate module. [ruby-dev:48878] [Bug #10885]
-
-	* vm_core.h, class.c: change accordingly.
-
-	* test/ruby/test_refinement.rb: add a test for above.
-
-Sun Feb 22 10:43:37 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* gc.c (rb_objspace_call_finalizer): control GC execution during
-	  force firnalizations at the end of interpreter process.
-	  [Bug #10768]
-
-	  1) Prohibit incremental GC while running Ruby-level finalizers
-	     to avoid any danger.
-	  2) Prohibit GC while invoking T_DATA/T_FILE data structure
-	     because these operations break object relations consistency.
-
-	  This patch can introduce another memory consuming issue because
-	  Ruby-level finalizers can run after (2), GC is disabled.
-	  However, basically object consistency was broken at (2) as I
-	  described above. So that running Ruby-level finalizers contains
-	  danger originally. Because of this point, I need to suggest to
-	  remove these 3 lines (invoking remaining finalizers). And add a
-	  rule to add that finalizers should not add new finalizers, or
-	  say there is no guarantee to invoke finalizers that added by
-	  another finalizer.
-
-Sun Feb 22 04:07:05 2015  Zachary Scott  <e@zzak.io>
-
-	* ext/openssl/ossl_asn1.c: [DOC] RDoc formatting fixes for
-	  ASN1::ObjectId with patch from @vbatts [Fixes GH-834]
-
-	* ext/openssl/ossl_bn.c: ditto.
-
-Sat Feb 21 19:51:49 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* re.c (match_aref): RMatch::regexp is Qnil after matching by a
-	  string since r45451.  [ruby-core:68209] [Bug #10877]
-
-Sat Feb 21 16:18:42 2015  Stefan Schuler  <mail@stefanschuessler.de>
-
-	* compar.c (Init_Comparable): [DOC] Replace camelcase variable name.
-	  [Fix GH-833]
-
-Fri Feb 20 17:27:12 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* file.c (rb_file_identical_p): fix handle leak, ensure to close
-	  the handle of the first argument.
-
-Fri Feb 20 17:19:23 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* win32/win32.c (different_device_p): compare by volume serial
-	  numbers, not by path names.  [ruby-core:68162] [Bug #10865]
-
-Thu Feb 19 01:58:10 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* win32/file.c (rb_file_expand_path_internal): neither the drive
-	  of base directory nor the current drive are involved in the
-	  result if different than the drive of path.
-	  [ruby-core:68130] [Bug #10858]
-
-Wed Feb 18 10:48:56 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* win32/win32.c (wrename): return EXDEV if moving a directory to
-	  another drive, since MoveFileExW does not set proper error code.
-	  [ruby-core:68162] [Bug #10865]
-
-Wed Feb 18 03:13:52 2015  Aaron Patterson <aaron@tenderlovemaking.com>
-
-	* ext/psych/lib/psych.rb: bump psych version.
-	* ext/psych/psych.gemspec: ditto
-	* ext/psych/yaml/scanner.c: add latest libyaml change.
-	* test/psych/helper.rb: support newer minitest
-	* test/psych/test_to_yaml_properties.rb: ditto
-
-Tue Feb 17 11:47:17 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* lib/resolv.rb (Resolv::DNS::Resource#==, #hash): elements
-	  returned by Kernel#instance_variables are Symbols now.
-	  [ruby-core:68128] [Bug #10857]
-
-Tue Feb 17 10:59:10 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* doc/syntax/calling_methods.rdoc: Fix documentation for "calling_methods"
-	  Patch by @sos4nt [fix GH-830][ci skip]
-
-Tue Feb 17 10:53:29 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* win32/file.c (rb_file_expand_path_internal): do not make invalid
-	  (or ADS) path if the path has a drive letter, the result also
-	  should have be under it.  [ruby-core:68130] [Bug #10858]
-
-Tue Feb 17 10:47:20 2015  Iain Beeston  <iain.beeston@gmail.com>
-
-	* hash.c: Added docs to explain that #include? and #member? do not
-	  check member equality
-	* lib/set.rb: ditto
-
-Mon Feb 16 20:58:49 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* compile.c (compile_massign): optimization for special case,
-	  assignments by aset or attrset.
-	  http://kokizzu.blogspot.jp/2015/02/c-java-hhvm-ruby-nodejsrhinojscspidermo.html
-	  http://www.atdot.net/~ko1/diary/201502.html#d16
-
-Sun Feb 15 10:41:23 2015  Sho Hashimoto  <sho-h@ruby-lang.org>
-
-	* doc/standard_library.rdoc: [DOC] delete removed libraries.
-	  [misc #10843] [ci skip]
-
-Sat Feb 14 12:20:01 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* random.c (rand_random_number): add a method to return a random
-	  number like SecureRandom to Random::Formatter.
-
-	* lib/securerandom.rb (random_bytes): move to Random::Formatter,
-	  the base method of the module.
-
-Sat Feb 14 12:01:32 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* random.c (random_raw_seed): extract platform dependent random
-	  seed initialization function as a new method Random.raw_seed.
-
-	* lib/securerandom.rb (SecureRandom): use Random.raw_seed.
-
-Sat Feb 14 00:49:37 2015  Aaron Patterson <aaron@tenderlovemaking.com>
-
-	* ext/coverage/coverage.c: Add Coverage.peek_result.  Allows you to
-	  capture coverage information without stopping the coverage tool.
-	  [ruby-core:67940] [Feature #10816]
-
-	* test/coverage/test_coverage.rb: test for change.
-
-Fri Feb 13 21:52:05 2015  Yusuke Endoh  <mame@tsg.ne.jp>
-
-	* string.c (str_discard): does not free for STR_NOFREE string.
-	  [Bug #10853][ruby-core:68110]
-
-	* bootstraptest/test_string.rb: test for above.
-
-Fri Feb 13 21:16:00 2015  Yusuke Endoh  <mame@tsg.ne.jp>
-
-	* lib/base64.rb: make urlsafe mode user-friendly.
-
-	* lib/base64.rb (Base64.urlsafe_encode64): a new option "padding" to
-	  suppress the padding character ("=").
-
-	* lib/base64.rb (Base64.urlsafe_decode64): now it accepts not only
-	  correctly-padded input but also unpadded input.
-	  [Feature #10740][ruby-core:67570]
-
-	* test/base64/test_base64.rb: Test for above
-
-Fri Feb 13 14:19:06 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/json: merge upstream from flori/json
-	  change usage of TypedData. [Feature #10739][ruby-core:67564]
-
-Thu Feb 12 18:34:01 2015  multisnow  <infinity.blick.winkel@gmail.com>
-
-	* ext/openssl/extconf.rb: check RAND_edg to support libressl.
-
-	* ext/openssl/ossl_rand.c (ossl_rand_egd): define only if RAND_edg
-	  is available.  [Fix GH-829]
-
-Thu Feb 12 10:46:14 2015  Eric Hodel  <drbrain@segment7.net>
-
-	* proc.c (proc_call):  Improve Proc#call documentation.  Patch by
-	  Hsing-Hui Hsu.  [fix GH-761]
-
-Thu Feb 12 04:33:02 2015  Benoit Daloze  <eregontp@gmail.com>
-
-	* compar.c (cmp_equal): no more error hiding for Comparable#==.
-	  It now behaves as other Comparable methods. See #7688.
-
-	* test/ruby/test_comparable.rb: update related test.
-
-Thu Feb 12 03:28:05 2015  Eric Wong  <e@80x24.org>
-
-	* lib/set.rb (initialize): internal hash defaults to false
-
-	* lib/set.rb (include?): use Hash#[] for optimized dispatch.
-	  Patch by Ismael Abreu <ismaelga@gmail.com>
-	  [ruby-core:67664] [Misc #10754]
-
-Wed Feb 11 11:09:52 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/digest/digest_conf.rb (digest_conf): check for CommonDigest.
-
-	* ext/digest/*/*cc.h: for Apple CommonCrypto/CommonDigest.h.
-
-	* ext/digest/digest.h (DEFINE_FINISH_FUNC_FROM_FINAL): macro for
-	  finish functions, by inverting arguments order.
-
-	* ext/digest/digest_conf.rb (digest_conf): extract common
-	  configurations.
-
-Wed Feb 11 11:01:33 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/json/generator/generator.c (generate_json): get rid of
-	  unnecessary recursive calls which can cause infinite recursion.
-	  T_STRING may not have rb_cString.
-
-Wed Feb 11 07:53:35 2015  Masaki Suketa <masaki.suketa@nifty.ne.jp>
-
-	* test/win32ole/test_word.rb: use skip method to skip test.
-
-Tue Feb 10 11:38:28 2015  Shugo Maeda  <shugo@ruby-lang.org>
-
-	* vm_insnhelper.c (vm_call_method): stop method search when a method
-	  is not found in a refinement, to support undef in refinements.
-	  [ruby-core:66741] [Bug #10578]
-
-Tue Feb 10 11:19:11 2015  Shugo Maeda  <shugo@ruby-lang.org>
-
-	* lib/net/ftp.rb (chdir, delete, gettextfile, mdtm, mkdir, nlst,
-	  putbinaryfile, puttextfile, rename, rmdir, size): support
-	  Pathname. Patch by Joe Rafaniello. [fix GH-828]
-
-Mon Feb  9 16:36:12 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* tool/make-snapshot (package): get rid of loading unbundled and
-	  unexpected libraries.  [ruby-core:67977] [Bug #10822]
-
-Sun Feb  8 20:09:37 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/net/http/header.rb: pass header names as symbols.
-	  Patch by @DamirSvrtan [fix GH-805]
-	* test/net/http/test_httpheader.rb: added test.
-
-Sun Feb  8 13:04:25 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/socket/getaddrinfo.c (get_addr): reject too long hostname to
-	  get rid of GHOST vulnerability on very old platforms.
-
-	* ext/socket/raddrinfo.c (make_hostent_internal): ditto, paranoic
-	  check for the canonical name.
-
-Sun Feb  8 12:48:38 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/win32/lib/win32/registry.rb (Win32::Registry::API): use wide
-	  versions of RegDeleteValue and RegDeleteKey.
-	  [ruby-core:67958] [Bug #10820]
-
-Sat Feb  7 22:13:08 2015  Masaki Suketa <masaki.suketa@nifty.ne.jp>
-
-	* test/win32ole/test_win32ole_record.rb: remove test using .NET
-	  Framework 3.5 because it is not included in Windows 8/8.1.
-
-Sat Feb  7 19:25:25 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (has_magic): always get long path name on Windows even if
-	  no tilde is there.  [ruby-core:68011] [Bug #10819]
-
-	* dir.c (replace_real_basename): FindFirstFile ignore redirection
-	  character, check if exists before call it.  cf. [Bug #8597]
-
-Sat Feb  7 13:30:11 2015  Masaki Suketa <masaki.suketa@nifty.ne.jp>
-
-	* test/win32ole/test_win32ole_record.rb
-	  (test_ole_instance_variable_get): correct VT_RECORD type and
-	  instance variables.
-
-Fri Feb  6 17:47:05 2015  Aaron Patterson <aaron@tenderlovemaking.com>
-
-	* ext/psych/lib/psych/visitors/yaml_tree.rb: register nodes when
-	  dumping objects with custom coders. [ruby-core:66215] [Bug #10496]
-
-	* test/psych/test_coder.rb: test for fix
-
-Fri Feb  6 16:58:31 2015  Aaron Patterson <aaron@tenderlovemaking.com>
-
-	* ext/psych/lib/psych/visitors/to_ruby.rb: fix support for regular
-	  expressions with newlines. tenderlove/psych#222
-
-	* test/psych/test_yaml.rb: test for change.
-
-Fri Feb  6 10:31:50 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* vm_core.h (rb_call_info_kw_arg_struct): make keywords a symbols
-	  list to get rid of inadvertent creation by variable keyword
-	  arguments.  [ruby-core:68031] [Bug #10831]
-
-Thu Feb  5 22:42:34 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/rubygems:  Update to RubyGems HEAD(5c3b6f3).
-	  Fixed #1156, #1142, #1115, #1142, #1139 on rubygems/rubygems
-	* test/rubygems:  ditto.
-
-Thu Feb  5 13:41:01 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* vm_eval.c (send_internal), vm_insnhelper.c (vm_call_opt_send):
-	  convert String method name into a Symbol, as method_missing
-	  method expects its first argument to be a Symbol.  [Bug #10828]
-
-	* vm_insnhelper.c (ci_missing_reason): return the reason of method
-	  missing in call info.
-
-	* vm_insnhelper.c (vm_call_opt_send): re-apply r49500 with the
-	  proper missing reason.  [Bug #10828]
-
-Thu Feb  5 10:31:46 2015  Shugo Maeda  <shugo@ruby-lang.org>
-
-	* class.c (rb_obj_singleton_methods): should use RTEST() to convert
-	  VALUE to int.
-
-Thu Feb  5 03:59:33 2015  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
-
-	* vm_insnhelper.c: Fix symbol leak with +send+ [Bug #10828]
-
-Wed Feb  4 20:26:54 2015  Masaki Suketa <masaki.suketa@nifty.ne.jp>
-
-	* ext/win32ole/win32ole.c (Init_win32ole): should not use atexit to
-	  free allocated hash table to avoid error on Cygwin.
-
-Wed Feb  4 15:34:25 2015  Shugo Maeda  <shugo@ruby-lang.org>
-
-	* class.c (method_entry_i, class_instance_method_list,
-	  rb_obj_singleton_methods): should not include methods of
-	  superclasses if recur is false. [ruby-dev:48854] [Bug #10826]
-
-Wed Feb  4 16:32:40 2015  Matt Hoyle  <matt@deployable.co>
-
-	* ext/bigdecimal/bigdecimal.c (VpSetPTR): fix a typo, 'expoennt'
-	  to 'exponent'.  [ruby-core:67980] [Bug #10823] [Fix GH-825]
-
-Wed Feb  4 15:55:38 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/sdbm/_sdbm.c: include ruby/ruby.h for PRIdPTRDIFF when a
-	  macro `DEBUG` is defined.  based on the patch by Owen Rodley in
-	  [ruby-core:67987]. [Bug #10825]
-
-Wed Feb  4 11:12:43 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* Makefile.in (probes.stamp): rebuild dtrace dependent objects
-	  only when `dtrace -G` modifies its input files.
-
-Tue Feb  3 19:27:16 2015  Naohisa Goto  <ngotogenome@gmail.com>
-
-	* common.mk (ruby-glommed.o): dependency on $(OBJ) should be written
-	  in common.mk (in which OBJ is defined) because of Makefile include
-	  and parse order. This partly reverts r49419.
-	  [ruby-dev:48849] [Bug #10808]
-
-	* Makefile.in (ruby-glommed.o): ditto.
-
-	* Makefile.in (ruby-glommed.o): remove excess $(DTRACE_OBJ) because
-	  it is included in $(OBJS) since r49451.
-
-	* Makefile.in (probes.o): should depend on $(DTRACE_DEPENDENT_OBJS)
-
-Tue Feb  3 17:15:45 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* lib/mkmf.rb (try_cppflags, try_cflags, try_ldflags): get rid of
-	  interference by modifying global variables in have_devel? method.
-	  [ruby-core:67962] [Bug #10821]
-
-Tue Feb  3 15:23:58 2015  Shugo Maeda  <shugo@ruby-lang.org>
-
-	* vm_method.c (remove_method): When remove refined
-	  method, raise a NameError if the method is not
-	  defined in refined class.
-
-	  But if the method is defined in refined class,
-	  it should keep refined method and remove original
-	  method.
-
-	  Patch by Seiei Higa. [ruby-core:67722] [Bug #10765]
-
-Tue Feb  3 14:04:47 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (glob_helper): obtain real name with FindFirstFile API
-	  instead of matching all entries, on Windows.
-	  [ruby-core:67954] [Bug #10819]
-
-Tue Feb  3 12:26:35 2015  Katsuhiko Nishimra  <ktns.87@gmail.com>
-
-	* lib/mkmf.rb (configuration): set the default cxxflags, which is
-	  referred from the default CXXFLAGS, for extension libraries.
-	  [Fix GH-823]
-
-Tue Feb  3 05:52:00 2015  Aman Gupta <ruby@tmm1.net>
-
-	* gc.c (rb_objspace_free): cause rb_bug if lazy sweep is in progress
-	  during rb_objspace_free. Adds extra protection for r46340.
-	  Patch by Vicent Marti. [Bug #10768] [ruby-core:67734]
-	* gc.c (rb_objspace_call_finalizer): Ensure GC is completed after
-	  finalizers have run. We already call gc_rest() before invoking
-	  finalizers, but finalizer can allocate new objects and start new GC
-	  cycle, so we call gc_rest() again after finalizers are complete.
-
-Mon Feb  2 10:51:34 2015  Ari Pollak  <ajp@aripollak.com>
-
-	* doc/security.rdoc (Symbols): update about Symbol GC.  Symbols
-	  explicitly converted from Strings now can be collected, but
-	  reflection/metaprogramming still can cause memory flooding.
-	  [Fix GH-725]
-
-Sun Feb  1 13:46:52 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* tool/rbinstall.rb (bin-comm): drop batch file installation.
-	  Windows 95 support has not been supported already.
-	  [Feature #10806]
-
-Sat Jan 31 12:06:23 2015  Scott Francis  <scott.francis@shopify.com>
-
-	* thread_pthread.c (reserve_stack): fix intermittent SIGBUS on
-	  Linux, by reserving the stack virtual address space at process
-	  start up so that it will not clash with the heap space.
-	  [Fix GH-822]
-
-Fri Jan 30 17:28:29 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* math.c (num2dbl_with_to_f): make faster when Bignum passed by
-	  direct conversion using rb_big2dbl().  [Feature #10800]
-
-Thu Jan 29 23:30:00 2015  Kenta Murata  <mrkn@mrkn.jp>
-
-	* ext/bigdecimal/bigdecimal.c (rb_rational_num): add fallback function
-	  for rubies lower than 2.2.0.
-
-	* ext/bigdecimal/bigdecimal.c (rb_rational_den): ditto.
-
-	* ext/bigdecimal/extconf.rb: check the existences of struct RRational,
-	  rb_rational_num, and rb_rational_den.
-
-	* ext/bigdecimal/bigdecimal.bundle: bump version.
-
-Thu Jan 29 20:28:25 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* tool/make-snapshot: removed md5 digest with package information
-
-Thu Jan 29 10:41:52 2015  Kazuki Tanaka  <gogotanaka@ruby-lang.org>
-
-	* math.c (Get_Double): direct casting from Fixnum to double.
-	  [Feature #10785]
-
-Thu Jan 29 02:34:27 2015  Aaron Patterson <aaron@tenderlovemaking.com>
-
-	* ext/psych/lib/psych/visitors/to_ruby.rb: fix parsing hashes with
-	  instance variables when it is referenced multiple times.
-	* ext/psych/lib/psych.rb: bump version
-	* ext/psych/psych.gemspec: bump version
-	* test/psych/test_hash.rb: test for fix
-
-Thu Jan 29 02:06:09 2015  Eric Wong  <e@80x24.org>
-
-	* thread.c (struct join_arg): restructure and make smaller
-	  (thread_join_sleep): avoid timeofday() call if forever
-	  (thread_join): pass join_arg.delay directly
-	  (rb_thread_inspect_msg): remove, inline into rb_thread_inspect
-	  (rb_thread_inspect): reduce branching and string creation
-	* thread_pthread.c (native_set_thread_name): create string directly
-	  to avoid reparsing. [Misc #10723]
-
-Wed Jan 28 21:32:24 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* thread.c: Improve documentation for Thread#value
-	  [Bug #10694][ruby-core:67324][ci skip]
-
-Tue Jan 27 16:04:19 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/redmine-backporter.rb: added `!` command.
-
-Tue Jan 27 15:58:23 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/redmine-backporter.rb: added history feature for platforms which
-	  lack readline.
-
-Mon Jan 26 22:09:35 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* .gitignore: ignored temporary file with git.
-
-Mon Jan 26 18:06:03 2015  Akinori MUSHA  <knu@iDaemons.org>
-
-	* misc/ruby-electric.el: Import version 2.2.2 from
-	  https://github.com/knu/ruby-electric.el.
-
-Mon Jan 26 11:37:49 2015  Dave Stevens  <dave@crowdlab.com>
-
-	* string.c (str_make_independent_expand): terminate String when
-	  moved from heap to embedded.  [Fix GH-821].
-
-Sun Jan 25 12:04:12 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* array.c (flatten): no need to call to_ary method on elements
-	  beyond the given level.  [ruby-core:67637] [Bug #10748]
-
-Sun Jan 25 00:42:24 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/fiddle/win32/libffi.mk.tmpl: assemble without directory prefix.
-	  workaround of a bug of VC12 ml, by unak at [ruby-core:67792].
-	  [ruby-core:67789] [Bug #10780]
-
-Sat Jan 24 19:56:25 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dln_find.c (dln_find_1): search regular files only.  based on
-	  the patch by Alex Coomans in [ruby-core:67766].  [Bug #10776]
-
-Fri Jan 23 23:57:05 2015  Misumi Rize  <r@ayase-e.li>
-
-	* vm_insnhelper.c (vm_throw_start): search the target to break
-	  from a block with nested rescue, from the nested blocks.
-	  [ruby-core:67765] [Bug #10775] [Fix GH-820]
-
-Fri Jan 23 20:00:59 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* marshal.c (w_object, marshal_dump): use identity tables for
-	  arbitrary VALUE keys, because of performance of FLONUM.
-	  [Bug #10761]
-
-	* marshal.c (obj_alloc_by_klass, marshal_load): ditto.
-
-Fri Jan 23 17:12:33 2015  Eric Wong  <e@80x24.org>
-
-	* benchmark/bm_marshal_dump_flo.rb: new benchmark for [Bug #10761]
-
-Thu Jan 22 18:03:19 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/redmine-backporter.rb (find_svn_log): use double quotes instead
-	  of single quotes because cmd.exe doesn't handle them.
-
-	* tool/redmine-backporter.rb (done): the 2nd element of matched data
-	  is the offset of the end of matched string, not length.
-
-Thu Jan 22 16:45:24 2015  Eric Wong  <e@80x24.org>
-
-	* st.c (st_numhash): mix float value for flonum
-	* hash.c (rb_any_hash): ditto
-	* benchmark/bm_hash_aref_flo.rb: new benchmark
-	* benchmark/bm_hash_ident_flo.rb: ditto
-	  [Bug #10761]
-
-Wed Jan 21 22:33:51 2015  Akinori MUSHA  <knu@iDaemons.org>
-
-	* misc/ruby-electric.el: Import version 2.2.1 from
-	  https://github.com/knu/ruby-electric.el.  Improve compatibility
-	  with and optimize for Emacs 24.4.
-
-Wed Jan 21 09:40:52 2015  Zachary Scott  <e@zzak.io>
-
-	* file.c: Document other cases of missing birthtime on OS with patch
-	  provided by @sho-h similar to GH-817. [ci skip] [DOC]
-
-Wed Jan 21 09:09:19 2015  Tanaka Akira  <akr@fsij.org>
-
-	* NEWS: References to tickets added.
-	  [ruby-core:67701] [Bug #10760] Suggested by Zachary Scott.
-
-Tue Jan 20 22:59:54 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* tool/vcs.rb: fix the exception given remote-url of svn.
-
-Tue Jan 20 12:58:33 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/redmine-backporter.rb: now can change the page of `ls`.
-
-Tue Jan 20 12:28:37 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/redmine-backporter.rb (readline): fallback to normal gets on
-	  Windows because IO.console.getch is not always do as expected.
-
-Tue Jan 20 11:31:07 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/redmine-backporter.rb: update usage.
-
-Tue Jan 20 11:23:47 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* tool/redmine-backporter.rb (mygets): to support Backspace
-	  implement gets by itself.
-
-Tue Jan 20 02:54:11 2015  Zachary Scott  <e@zzak.io>
-
-	* file.c: NotImplementedError is raised if birthtime is unavailable.
-	  Patch by @y-yagi san and [Fixes GH-817] [ci skip] [DOC]
-
-	* ext/pathname/pathname.c: ditto.
-
-Mon Jan 19 22:08:26 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* class.c (include_modules_at): allow prepend each modules upto
-	  once for each classes.  [EXPERIMENTAL]
-
-Sun Jan 18 18:32:20 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* math.c (math_atan2): revive documentation before r49220.
-	  http://d.hatena.ne.jp/nagachika/20150112/ruby_trunk_changes_49213_49226
-
-Sun Jan 18 15:57:32 2015  Seiei Higa  <hanachin@gmail.com>
-
-	* vm_method.c (check_definition): Module#public_method_defined?,
-	  Module#private_method_defined?, Module#protected_method_defined?
-	  should not use refinements. [ruby-core:67656] [Bug #10753]
-
-Sun Jan 18 15:50:39 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* vm_dump.c (rb_vm_bugreport): check by configured result instead
-	  of system name for old FreeBSD.  based on a patch by Steve Wills
-	  at [ruby-core:67655].  [Bug #10752]
-
-Sun Jan 18 12:56:49 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* Makefile.in (VPATH, NEWLINE_C), common.mk (common-srcs): make
-	  and use newline.c under enc/trans directory, not toplevel.  no
-	  longer search enc directory implicitly.
-
-	* configure.in, enc/Makefile.in (BUILTIN_ENCS, BUILTIN_TRANSES):
-	  prefix respective directory names to builtin encodings and
-	  transcoder source names.
-
-Sun Jan 18 11:49:46 2015  Masaki Suketa <masaki.suketa@nifty.ne.jp>
-
-	* ext/win32ole/win32ole.c (ole_invoke): avoid SEGV when VT_RECORD
-	  variable is passed by reference. [ruby-dev:48803] [Bug #10697]
-
-Sat Jan 17 23:59:15 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/psych/lib/psych/visitors/yaml_tree.rb (visit_String):
-	  anchors like `\Z` are not valid inside character class.  use
-	  negative-lookahead instead.
-	  Fixes: https://github.com/tenderlove/psych/issues/221
-
-Sat Jan 17 23:42:27 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* configure.in: get rid of pattern substitution, which is not
-	  supported by ash, and ash on NetBSD parses whole source first
-	  and fails to start.  [ruby-dev:48823] [Bug #10750]
-
-Fri Jan 16 18:42:58 2015  NARUSE, Yui  <naruse@ruby-lang.org>
-
-	* tool/redmine-backporter.rb: support adding related revisions
-	  to issues.
-
-Fri Jan 16 17:20:33 2015  Koichi Sasada  <ko1@atdot.net>
-
-	vm.c, vm_core.h: constify VM_CF_LEP, VM_CF_PREV_EP, VM_CF_BLOCK_PTR
-	and rb_vm_control_frame_block_ptr.
-
-Fri Jan 16 15:41:21 2015  Aaron Patterson <aaron@tenderlovemaking.com>
-
-	* ext/psych/lib/psych.rb: bump version
-
-	* ext/psych/psych.gemspec: ditto
-
-Fri Jan 16 15:37:49 2015  Aaron Patterson <aaron@tenderlovemaking.com>
-
-	* ext/psych/lib/psych/visitors/yaml_tree.rb: only dump hash
-	  subclasses. Thanks Joe Eli McIlvain <joe.eli.mac@gmail.com>
-
-	* test/psych/test_hash.rb: test for change
-
-Fri Jan 16 15:35:21 2015  Aaron Patterson <aaron@tenderlovemaking.com>
-
-	* ext/psych/lib/psych.rb: bump version
-
-	* ext/psych/lib/psych/visitors/yaml_tree.rb: fix line width wrapping
-	  for long strings.  Thanks Jakub Jirutka <jakub@jirutka.cz>
-
-	* test/psych/test_string.rb: test for change
-
-Fri Jan 16 11:44:44 2015  Kazuki Tsujimoto  <kazuki@callcc.net>
-
-	* eval_intern.h, vm.c, vm_eval.c, vm_insnhelper.c:
-	  change throw mechanism (not save target ep, but save target cfp).
-	  It fixes `unexpected break' bug that occurs when
-	  TracePoint#binding is called.
-	  [ruby-dev:48797] [Bug #10689]
-
-	* test/ruby/test_settracefunc.rb: add a test.
-
-Thu Jan 15 23:55:15 2015  Tanaka Akira  <akr@fsij.org>
-
-	* io.c (rb_io_close_m): Don't raise when the IO object is closed.
-	  [ruby-core:67444] [Feature #10718]
-
-Thu Jan 15 21:34:57 2015  Seiei Higa  <hanachin@gmail.com>
-
-	* proc.c (rb_obj_singleton_method): Kernel#singleton_method should
-	  not use refinements, as well as Kernel#method.
-	  [ruby-core:67603] [Bug #10744]
-
-Thu Jan 15 10:45:04 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* array.c (rb_ary_select_bang, ary_reject_bang): linear
-	  performance.  [ruby-core:67418] [Feature #10714]
-
-Wed Jan 14 18:06:06 2015  Martin Duerst  <duerst@it.aoyama.ac.jp>
-
-	* lib/uri/mailto.rb: raising URI::InvalidComponentError instead
-	  of failing with undefined method `split' for nil:NilClass for
-	  mailto: URIs without opaque part. [Bug #10738]
-	* test/uri/testuri.rb: Test for above
-
-Wed Jan 14 16:45:24 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* tool/downloader.rb (RubyGems.download): verify downloaded gem
-	  packages.  LowSecurity to allow untrusted certificates now.
-
-Wed Jan 14 15:43:48 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/readline/readline.c (readline_s_refresh_line): initialize
-	  before rl_refresh_line(), as some function make the internal
-	  state non-clean but rl_refresh_line() does not re-initialize it.
-	  [ruby-core:43957] [Bug #6232]
-
-Tue Jan 13 21:59:24 2015  Michal Papis  <mpapis@gmail.com>
-
-	* tool/rbinstall.rb (gem): fix changing permissions of installed
-	  bundled gems.  [Fix GH-812]
-
-Tue Jan 13 21:57:12 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* common.mk (distclean-local): remove autom4te.cache generated by
-	  autoconf.
-
-	* common.mk (realclean-local): remove id sources and dummy header
-	  for dtrace.  [ruby-core:67562] [Bug #10737]
-
-Tue Jan 13 21:08:22 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/json, test/json: merge JSON HEAD(259dee6)
-	  separate implementation of Typed_Data macro.
-	  https://github.com/flori/json/compare/v1.8.1...v1.8.2
-
-Tue Jan 13 14:16:35 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* test/net/http/test_http.rb: get rid of accessing DNS actually
-	  for some servers returning wrong results.
-	  [ruby-core:67454] [Bug #10721]
-
-Mon Jan 12 23:21:57 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* gems/bundled_gems: update test-unit to 3.0.9.
-
-Mon Jan 12 18:35:44 2015  Eric Wong  <e@80x24.org>
-
-	* numeric.c (bit_coerce): use original value for error message
-	  [ruby-core:67405] [Bug #10711]
-	* test/ruby/test_numeric.rb (test_coerce): check error message
-
-Mon Jan 12 18:01:24 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* lib/rdoc/text.rb (expand_tabs): get rid of infinite loop with
-	  CR.  should check if substitution occurred too.
-	  [ruby-dev:48813] [Bug #10732]
-
-Mon Jan 12 16:45:46 2015  Seiei Higa  <hanachin@gmail.com>
-
-	* vm_method.c (rb_alias): raise a NameError when creating alias to
-	  a refined method if the original method of the refined method is
-	  not defined.  [ruby-core:67523] [Bug #10731]
-
-Mon Jan 12 13:53:17 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* math.c (math_atan2): improve documentation.
-	  [Feature #10323][ruby-core:65400][ci skip]
-
-Mon Jan 12 13:50:49 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/bigdecimal/bigdecimal.c: fixes documentation like labeled lists,
-	  code examples etc. [ruby-core:66730][Bug #10576][ci skip]
-
-Mon Jan 12 13:36:44 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/optparse.rb: improvements for OptionParser documentation.
-	  [misc #10608][ruby-core:66901][ci skip]
-
-Mon Jan 12 13:33:52 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* array.c (rb_ary_each): documented return value.
-	  [misc #10469][ruby-core:66063]
-
-Sun Jan 11 15:11:38 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* test/webrick/test_utils.rb (test_create_listeners): use
-	  dynamically chosen port number, not hardcoded port number.
-	  [ruby-core:67508]
-
-Sat Jan 10 12:57:12 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/zlib/zlib.c: fix document of method signatures.
-	  [Bug #10668][ruby-core:67186][ci skip]
-
-Sat Jan 10 12:32:44 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* eval_error.c (error_print): pos and len parameters of rb_str_substr()
-	  are counted by characters, not bytes.  use rb_str_subseq() instead.
-	  [Bug #10727] [ruby-core:67473]
-
-Sat Jan 10 10:58:55 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* complex.c: removed commented-out code.
-
-Sat Jan 10 10:57:19 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* rational.c: removed commented-out code.
-	  [Feature #10376][ruby-core:65643]
-
-Sat Jan 10 10:12:15 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* array.c (rb_ary_select_bang): keep the array consistent by
-	  removing unselected values soon.  [ruby-dev:48805] [Bug #10722]
-
-Fri Jan  9 23:20:04 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/rubygems:  Update to RubyGems HEAD(e53c54a).
-	* test/rubygems:  ditto.
-
-Fri Jan  9 11:13:01 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* parse.y (assocs, assoc): eliminate splatting empty literal
-	  hashes.  [ruby-core:67446] [Bug #10719]
-
-	* compile.c (compile_array_): support splatted hash in hash type.
-
-Fri Jan  9 10:57:09 2015  Vit Ondruch  <vondruch@redhat.com>
-
-	* configure.in (RUBY_SETJMP_TYPE): Remove superfluous semicolon
-	  which causes a syntax error with autoconf 2.63.
-	  [ruby-core:67429] [Bug #10716]
-
-Fri Jan  9 07:23:32 2015  Aaron Patterson <aaron@tenderlovemaking.com>
-
-	* ext/psych/lib/psych/visitors/yaml_tree.rb: correctly quote non-ascii
-	  letters. Thanks @jirutka for the patch.
-
-	* test/psych/test_string.rb: test for change
-
-Fri Jan  9 07:13:55 2015  Aaron Patterson <aaron@tenderlovemaking.com>
-
-	* ext/psych/lib/psych/visitors/to_ruby.rb: call `allocate` on hash
-	  subclasses.  Fixes github.com/tenderlove/psych/issues/196
-
-	* test/psych/test_hash.rb: test for change
-
-Fri Jan  9 06:58:43 2015  Aaron Patterson <aaron@tenderlovemaking.com>
-
-	* ext/psych/lib/psych/visitors/to_ruby.rb: revive hashes with ivars
-
-	* ext/psych/lib/psych/visitors/yaml_tree.rb: dump hashes with ivars.
-	  Fixes github.com/psych/issues/43
-
-	* test/psych/test_hash.rb: test for change
-
-Thu Jan  8 17:05:00 2015  Seiei Higa  <hanachin@gmail.com>
-
-	* vm_method.c (rb_method_entry): if no super class, no original
-	  method entry.  [ruby-core:67389] [Bug #10707]
-
-Thu Jan  8 16:31:43 2015  Seiei Higa  <hanachin@gmail.com>
-
-	* vm_method.c (rb_export_method): bail out if the original method
-	  is undefined when the method is refined.
-	  [ruby-core:67387] [Bug #10706]
-
-Thu Jan  8 12:53:44 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (glob_helper): match in case-folding only if the directory
-	  resides on a case-insensitive file system, on OSX.
-	  [ruby-core:67364] [Bug #10700]
-
-Thu Jan  8 11:39:18 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* .travis.yml: Remove redundant configuration option.
-	  [fix GH-809] Patch by @gxworld
-
-Thu Jan  8 07:17:14 2015  Eric Wong  <e@80x24.org>
-
-	* lib/resolv.rb: consider ENETUNREACH as ResolvTimeout
-	  [ruby-core:67411] [Bug #10712]
-
-Thu Jan  8 00:13:52 2015  Tanaka Akira  <akr@fsij.org>
-
-	* lib/open3.rb: Open3 properly passes non-keyword hash args to spawn.
-	  Fixed by Josh Cheek.  [Fix GH-808]
-	  Related to [ruby-core:67347] [Bug #10699]
-
-Wed Jan  7 19:19:26 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (dir_initialize): workaround of opendir failure at symlink
-	  directories on Windows via CIFS.
-
-Wed Jan  7 18:52:50 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* dir.c (need_normalization): not only HFS+, CIFS (SMB) is also
-	  decomposed.  [Bug #10704]
-
-	* dir.c (NORMALIZE_UTF8PATH): Unicode decomposition seems to
-	  perform in an upper layer than file systems on OSX, as all path
-	  names are always decomposed regardless of file system types.
-
-Tue Jan  6 21:41:04 2015  Tanaka Akira  <akr@fsij.org>
-
-	* time.c (timelocalw): Set tm_isdst field -1 if vtm->isdst is
-	  VTM_ISDST_INITVAL.  This bug is introduced at packing struct
-	  vtm (r45155).
-	  [ruby-core:67345] [Bug #10698] Reported by Boris Ruf.
-
-Tue Jan  6 03:10:54 2015  Koichi Sasada  <ko1@atdot.net>
-
-	* test/fiddle/test_handle.rb: fix syntax.
-
-Tue Jan  6 00:16:10 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* test/fiddle/test_handle.rb (test_NEXT): use -test-/dln/empty
-	  which is always a shared object and is not used by others.
-	  [ruby-dev:48629] [Bug #10384]
-
-Mon Jan  5 14:58:01 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* test/ruby/test_io.rb: added timeout for AIX environment.
-	  [ruby-core:62983][Bug #9917]
-
-Sun Jan  4 22:33:33 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* test/lib/test/unit.rb (ExcludesOption): add "excludes" support
-	  to test suite, for alternative implementations and platforms.
-	  [Feature #10682]
-
-Sun Jan  4 22:32:42 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* test/lib/test/unit.rb (Test::Unit): reorder modules and merge
-	  each modules.
-
-	* test/lib/test/unit.rb (Test::Unit): split the large class into
-	  each modules.
-
-Sun Jan  4 21:32:52 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* parse.y (f_label): return tLABEL value as it is.
-	  [ruby-core:67315] [Bug #10693]
-
-Sun Jan  4 14:02:37 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* test/lib/test/unit/parallel.rb (run): expand the file name to be
-	  loaded, so that relative paths work in parallel mode.
-
-Sun Jan  4 13:36:56 2015  Ayumu AIZAWA  <ayumu.aizawa@gmail.com>
-
-	* test/test_tempfile.rb: use assert_file for more descriptive message.
-	  following r49131.
-
-Sun Jan  4 13:05:09 2015  Ayumu AIZAWA  <ayumu.aizawa@gmail.com>
-
-	* string.c: improve docs for String#<=>. [ruby-core:65399][Feature #10322]
-	  Patch by gogo tanaka.
-
-Sun Jan  4 12:42:24 2015  Ayumu AIZAWA  <ayumu.aizawa@gmail.com>
-
-	* array.c: improve docs for Array#reject. [ruby-core:65324][misc #10307]
-	  Patched by Nebu Pookins.
-
-Sun Jan  4 12:24:11 2015  Ayumu AIZAWA  <ayumu.aizawa@gmail.com>
-
-	* string.c: improve docs for String#strip and variations.
-	  [ruby-core:66081][Bug #10476]
-
-Sun Jan  4 09:21:04 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/drb/drb.rb: removed unused argument. Patch by @vipulnsward
-	  [fix GH-515]
-
-Sun Jan  4 09:18:31 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/tempfile.rb: provide default basename parameter.
-	  [fix GH-523] Patch by @dissolved
-	* test/test_tempfile.rb: ditto.
-
-Sun Jan  4 00:43:41 2015  Ayumu AIZAWA  <ayumu.aizawa@gmail.com>
-
-	* README.ja.md: add guidance of mailing list and bugs.r-l.o.
-
-Sat Jan  3 23:56:28 2015  Ayumu AIZAWA  <ayumu.aizawa@gmail.com>
-
-	* hash.c: fix docs for Hash#invert. [ruby-core:66917] [Bug #10612]
-
-Sat Jan  3 19:52:12 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* include/ruby/intern.h (rb_str_new_literal): define on all
-	  platforms, not only gcc.
-
-Sat Jan  3 18:53:28 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/fiddle/lib/fiddle/cparser.rb (parse_ctype): limit split word
-	  number as the rest are not used.
-
-Sat Jan  3 18:19:50 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/fiddle/lib/fiddle/cparser.rb: r49110 broke Fiddle::Import with
-	  type_alias.
-	* test/fiddle/test_cparser.rb: added type_alias test for parse_ctype
-	  and parse_struct_signature.
-
-Sat Jan  3 11:50:16 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/openssl/ossl.h: avoid to build failure of Windows environment.
-	* ext/openssl/ossl_ssl_session.c: ditto.
-
-Sat Jan  3 11:27:46 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* array.c: Improve performance of Array#shift. use shared instead of
-	  MEMMOVE if with arguments. Patch by @ksss [fix GH-537]
-	* test/ruby/test_array.rb: ditto.
-	* benchmark/bm_array_shift.rb: Added benchmark of GH-537 issue.
-
-Sat Jan  3 10:38:52 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/net/http.rb: More descriptive error message when net/http fails
-	  to connect to a server. Patch by @xaviershay [fix GH-700]
-	* test/net/http/test_http.rb: ditto.
-
-Sat Jan  3 10:14:51 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/openssl/ossl.h: Make `SSL_SESSION_cmp` use `CRYPTO_memcmp`
-	  [fix GH-591] Patch by @PiPeep
-	* ext/openssl/ossl_ssl_session.c: ditto.
-
-Sat Jan  3 09:54:32 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/fiddle/lib/fiddle/cparser.rb: Support for Fiddle::CParser
-	  to handle rich signatures including parameter names and function
-	  pointer types. Patch by @theryan [fix GH-590]
-	* test/fiddle/test_cparser.rb: ditto.
-
-Sat Jan  3 09:01:43 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* NEWS: added compatibility entry of r49101.
-
-Fri Jan  2 21:06:59 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/net/http.rb (Net::HTTP#send_request): there is no response body
-	  with HEAD request. Patch by @rodrigosaito [fix GH-520]
-
-Fri Jan  2 21:04:36 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* test/net/http/test_http.rb (_test_send_request__HEAD): Added
-	  failing test for send_request with HEAD method.
-
-Fri Jan  2 18:41:20 2015  Tanaka Akira  <akr@fsij.org>
-
-	* eval.c (ruby_init): Print ruby_setup() error only in debug mode.
-	  Unsuppressable error message is not a good idea.
-	  Note that the message is printed sometimes with following
-	  code (highly timing dependent, though):
-	  pid = spawn("ruby -e ''"); Process.kill(:TERM, pid)
-
-Fri Jan  2 16:18:44 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* test/ruby/test_module.rb: Refactor invalid testcase.
-	  [fix GH-472][ruby-core:59035][Bug #9240]
-
-Fri Jan  2 15:53:00 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/webrick/utils.rb: removed unused argument variable.
-	  [fix GH-356] Patch by @vipulnsward
-	* lib/webrick/server.rb: ditto.
-	* lib/webrick/ssl.rb: ditto.
-	* test/webrick/test_utils.rb: added test for WEBrick::Utils#create_listeners.
-
-Fri Jan  2 15:35:53 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/securerandom.rb: improve syntax and grammar of documentation.
-	  [fix GH-796][ci skip] Patch by @Erol
-
-Fri Jan  2 15:10:01 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* test/openssl/test_ssl_session.rb (OpenSSL#test_ctx_client_session_cb):
-	  fix test failure with OpenSSL disabled SSLv3 protocol.
-	  [ruby-core:63772] [Bug #10046]
-
-Fri Jan  2 09:08:31 2015  Tanaka Akira  <akr@fsij.org>
-
-	* lib/resolv.rb (Resolv::DNS::Label::Str#==): Check class equality.
-	  (Resolv::DNS::Name#initialize): Normalize labels as
-	  Resolv::DNS::Label::Str objects.
-
-Thu Jan  1 21:41:49 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* doc/regexp.rdoc: fix regexp docs for whitespace character.
-	  [ruby-dev:48765] [Bug #10624]
-
-Thu Jan  1 17:50:52 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* test/ruby/test_rubyoptions.rb: try locale encoding name.
-	  [ruby-core:67109] [Bug #10643]
-
-Thu Jan  1 11:07:12 2015  Eric Wong  <e@80x24.org>
-
-	* symbol.c (rb_gc_free_dsymbol): delete from global fstr hash
-	* test/ruby/test_symbol.rb (test_symbol_fstr_leak): test for bug
-	  [ruby-core:67268] [Bug #10686]
-
-Thu Jan  1 09:14:21 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* vm_args.c (keyword_hash_p): fix non-symbol keys hash.
-	  rb_extract_keywords() returns 0 not Qnil when no symbol keys is
-	  included.  [ruby-core:67264] [Bug #10685]
-
-Wed Dec 31 17:48:43 2014  Tanaka Akira  <akr@fsij.org>
-
-	* lib/resolv.rb (Resolv::DNS::Label::Str#initialize): Set encoding
-	  ASCII-8BIT before downcase.  case insensitivity of DNS labels doesn't
-	  apply non-ASCII characters.  [RFC 4343]
-
-Wed Dec 31 16:48:44 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* parse.y (gettable_gen): disable warnings of possible reference
-	  to a local variable defined in a past scope.
-	  [ruby-core:67162] [Bug #10661]
-
-Wed Dec 31 13:43:48 2014  Tanaka Akira  <akr@fsij.org>
-
-	* lib/resolv.rb (Resolv::DNS::Name#==): Compare an array of Label:Str
-	  objects.  Label#Str#== is case-insensitive.
-
-Tue Dec 30 16:16:12 2014  Ben Miller  <bmiller@rackspace.com>
-
-	* lib/resolv.rb (Resolv::DNS::Name#==): DNS is case-insensitive, so the
-	  comparison should be case-insensitive as well.
-	  [ruby-core:66498] [Bug #10550]
-
-Tue Dec 30 16:03:45 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* lib/resolv.rb (Resolv::DNS::Name): names with different dots
-	  should be different.
-
-Tue Dec 30 13:16:56 2014  Martin Duerst  <bernhard+git@lsmod.de>
-
-	* lib/uri/common.rb: Initialize HTML5ASCIIINCOMPAT to empty Array
-	  to avoid error during bootstrap when encodings are not yet defined.
-	  [Bug #10678]
-
-Tue Dec 30 09:29:26 2014  Bernhard M. Wiedemann  <bernhard+git@lsmod.de>
-
-	* ext/dbm/dbm.c (Init_dbm): [DOC] as UNIX permissions are octal
-	  numbers, needs to be prefixed by 0.  [Fix GH-800]
-
-Tue Dec 30 08:57:39 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* lib/unicode_normalize.rb: typo fix. [ci skip]
-	  [ruby-dev:48794][misc #10675]
-
-Mon Dec 29 19:38:01 2014  Yukihiro Matsumoto  <matz@ruby-lang.org>
-
-	* version.h (RUBY_VERSION): 2.3.0 development has started.
-
-Mon Dec 29 18:58:46 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* re.c (unescape_nonascii): append escape sequence as-is not
-	  unescaped character, to get rid of unexpected meta-character.
-	  [ruby-core:67193] [Bug #10670]
-
-Mon Dec 29 14:27:33 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* doc/syntax/literals.rdoc (Symbols): now Symbols created by
-	  interpolation can be garbage collected.  patch by Yihang Ho in
-	  [ruby-core:67194].  [Bug #10671]
-
-Mon Dec 29 11:18:17 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* thread.c (rb_thread_variable_get): fix dynamic symbol keys.
-	  rb_check_id() returns non-zero only for static symbols, whereas
-	  thread local variable keys can be dynamic symbols.
-	  [ruby-core:67185] [Bug #10667]
-
-Mon Dec 29 10:37:27 2014  Thiago Lewin  <thiago_lewin@yahoo.com.br>
-
-	* io.c (rb_f_select): [DOC] workaround for YARD doc.  [Fix GH-799]
-
-	* process.c (proc_detach): [DOC] fix missing closing parenthesis.
-	  [Fix GH-799]
-
-Mon Dec 29 07:27:23 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/json, test/json: merge JSON HEAD(17fe8e7)
-	  https://github.com/flori/json/compare/v1.8.1...17fe8e7
-
-Sun Dec 28 23:49:37 2014  Michal Papis  <mpapis@gmail.com>
-
-	* rbinstall.rb: fix target location for installing bundled gems.
-	  install to the prepared directory instead of default Gem.dir,
-	  not to be affected GEM_HOME environment variable.  [Fix GH-798]
-
-Sun Dec 28 18:19:28 2014  Eric Wong  <e@80x24.org>
-
-	* test/-ext-/iseq_load/test_iseq_load.rb
-	  (test_next_in_block_in_block): test using ISeq#eval
-	  (test_break_ensure): ditto
-	  [ruby-core:66988]
-
-Sun Dec 28 16:25:12 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* cygwin/GNUmakefile.in (EXTOBJS): override to add resource files
-	  always.  [ruby-core:67153] [Bug #10657]
-
-Sun Dec 28 13:54:26 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* parse.y (f_kwrest, new_args_tail_gen): unnamed rest keyword and
-	  keywords bits arguments should be unique.  since internal IDs
-	  depend on the local variable index in the current scope, new ID
-	  should be made before popping those vtables.
-	  [ruby-core:67157] [Bug #10659]
-
-Sat Dec 27 20:12:55 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/json/generator/generator.c (JSON_Generator_State_type): add
-	  #ifdef for backward compatibility.
-
-	* ext/json/parser/parser.rl (JSON_Parser_type): ditto.
-
-	* ext/json/generator/generator.h (ZALLOC): add fallback definition.
-
-	* ext/json/parser/parser.h (ZALLOC): ditto.
-
-Sat Dec 27 16:54:05 2014  Tanaka Akira  <akr@fsij.org>
-
-	* process.c: Unused code removed.
-	  It seems waitpid() is universally available on POSIX platforms.
-
-Sat Dec 27 15:08:27 2014  Eric Wong  <e@80x24.org>
-
-	* vm_core.h (rb_vm_living_threads_insert): preserve order
-	  [Bug #10660] [ruby-core:67154] [ruby-core:67159]
-
-Sat Dec 27 13:08:20 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/socket/socket.c: improved document for YARD doc.
-	  [fix GH-795][ci skip] Patch by @tlewin
-
-Sat Dec 27 10:11:21 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* ext/tk/lib/tkextlib/tcllib/plotchart.rb: fix to invoke correct function
-	  of tcllib. Patch by @zalt50 [fix GH-787]
-
-Sat Dec 27 10:03:41 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
-
-	* tool/make-snapshot: show sha1 digest when making packages.
-	  it's request from https://github.com/ruby/www.ruby-lang.org/issues/921
-	  [fix GH-794]
-
-Fri Dec 26 15:32:16 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/tk/tcltklib.c (ip_invoke_core): remove probably duplicate
-	  dead code.
-
-Fri Dec 26 15:28:27 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/tk/tcltklib.c (ip_ruby_cmd_receiver_const_get): simply use
-	  rb_path2class() to get a class/module from its name.
-
-Fri Dec 26 15:20:54 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* marshal.c (w_long): append at once by w_nbyte() instead of
-	  appending byte by byte.
-
-Fri Dec 26 15:13:13 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/json/parser/parser.rl (unescape_unicode): check if valid
-	  before bit-or assignments.
-	  reported by Denis Denisov <denji0k AT gmail.com>.
-
-	* ext/nkf/nkf-utf8/nkf.c (nkf_iconv_t): fix a missing semicolon.
-	  reported by Denis Denisov <denji0k AT gmail.com>.
-
-	* process.c (rb_spawn_process): get rid of usage of uninitialized
-	  variable.
-	  reported by Denis Denisov <denji0k AT gmail.com>.
-
-	* regexec.c (match_at): ditto.
-
-	* ext/win32ole/win32ole.c (ole_wc2mb_alloc, ole_vstr2wc, ole_mb2wc):
-	  ditto.
-
-	* dir.c (ruby_glob0): no need to check never-NULL pointer.
-	  reported by Denis Denisov <denji0k AT gmail.com>.
-
-	* win32/file.c (rb_file_expand_path_internal): ditto.
-
-	* win32/file.c (code_page_i): handle realloc failure.
-	  reported by Denis Denisov <denji0k AT gmail.com>.
-
-	* win32/stub.c (stub_sysinit): ditto.
-
-	* fix printf format conversion specifiers.
-	  reported by Denis Denisov <denji0k AT gmail.com>.
-
-Fri Dec 26 01:41:40 2014  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/rbinstall.rb: skip installing bundle gems if zlib is unavailable.
-	  [Bug #10647] [ruby-dev:48787]
-
-Fri Dec 26 01:24:42 2014  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* tool/downloader.rb: support old versions of ruby.
-
-	* tool/downloader.rb: now can download gems by http if openssl is not
-	  available (this may be danger!)
-
-Fri Dec 26 00:13:48 2014  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* test/ruby/test_extlibs.rb: check existence of extension libraries
-	  which not depend on outer libraries. (experimental)
-
-Thu Dec 25 21:58:15 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/fiddle/extconf.rb: make PIC objects if it will be linked as
-	  a shared object eventually.  [ruby-core:67128]
-
-Thu Dec 25 19:01:13 2014  NAKAMURA Usaku  <usa@ruby-lang.org>
-
-	* ext/fiddle/win32/libffi-3.2.1-mswin.patch: support mswin32.
-
-Thu Dec 25 17:30:40 2014  Naohisa Goto  <ngotogenome@gmail.com>
-
-	* gc.c (wmap_final_func): fix memory size shortage when realloc wmap.
-	  Fix SEGV during finalize of WeakRef on Solaris (though the SEGV
-	  could occur on all OS/platforms). [ruby-dev:48779] [Bug #10646]
-
-Thu Dec 25 17:27:06 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* configure.in (NET_LUID): include winsock2.h instead of windows.h.
-	  patch by Jon Forums in [ruby-core:67125].  [Bug #10640]
-
-Thu Dec 25 16:14:10 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* ext/io/console/console.c (console_dev): send the given arguments
-	  to the opened console.  as a special case, do nothing if :close
-	  is given.
-
-	* test/lib/leakchecker.rb (LeakChecker#check_fd_leak): close if
-	  console.
-
-For the changes before 2.2.0, see doc/ChangeLog-2.2.0
-For the changes before 2.1.0, see doc/ChangeLog-2.1.0
-For the changes before 2.0.0, see doc/ChangeLog-2.0.0
-For the changes before 1.9.3, see doc/ChangeLog-1.9.3
-For the changes before 1.8.0, see doc/ChangeLog-1.8.0
-
-Local variables:
-coding: us-ascii
-add-log-time-format: (lambda ()
-  (let* ((time (current-time))
-	 (system-time-locale "C")
-	 (diff (+ (cadr time) 32400))
-	 (lo (% diff 65536))
-	 (hi (+ (car time) (/ diff 65536))))
-  (format-time-string "%a %b %e %H:%M:%S %Y" (list hi lo) t)))
-indent-tabs-mode: t
-tab-width: 8
-change-log-indent-text: 2
-end:
-vim: tabstop=8 shiftwidth=2
diff --git a/KNOWNBUGS.rb b/KNOWNBUGS.rb
index b97a08d928..35a8e75876 100644
--- a/KNOWNBUGS.rb
+++ b/KNOWNBUGS.rb
@@ -1,5 +1,7 @@
 #
-# This test file concludes tests which point out known bugs.
+# IMPORTANT: Always keep the first 7 lines (comments),
+# even if this file is otherwise empty.
+#
+# This test file includes tests which point out known bugs.
 # So all tests will cause failure.
 #
-
diff --git a/LEGAL b/LEGAL
index 24e36e6231..2777aa2c14 100644
--- a/LEGAL
+++ b/LEGAL
@@ -1,116 +1,331 @@
-LEGAL NOTICE INFORMATION
-------------------------
+# -*- rdoc -*-
+
+= LEGAL NOTICE INFORMATION
+--------------------------
 
 All the files in this distribution are covered under either the Ruby's
 license (see the file COPYING) or public-domain except some files
 mentioned below.
 
-ccan/build_assert/build_assert.h
-ccan/check_type/check_type.h
-ccan/container_of/container_of.h
-ccan/str/str.h
+[addr2line.c]
 
-  These files are licensed under the CC0.
+  A part of this file is from FreeBSD.
 
-    http://creativecommons.org/choose/zero/
+  >>>
+    Copyright (c) 1986, 1988, 1991, 1993::
+    The Regents of the University of California.  All rights reserved.
 
-ccan/list/list.h
+    (c) UNIX System Laboratories, Inc.
 
-  This file is licensed under the MIT License.
+    All or some portions of this file are derived from material licensed
+    to the University of California by American Telephone and Telegraph
+    Co. or Unix System Laboratories, Inc. and are reproduced herein with
+    the permission of UNIX System Laboratories, Inc.
 
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+    1. Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+    4. Neither the name of the University nor the names of its contributors
+       may be used to endorse or promote products derived from this software
+       without specific prior written permission.
 
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
+    THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
 
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-    THE SOFTWARE.
-
-include/ruby/oniguruma.h:
-regcomp.c:
-regenc.[ch]:
-regerror.c:
-regexec.c:
-regint.h:
-regparse.[ch]:
-enc/ascii.c
-enc/big5.c
-enc/cp949.c
-enc/emacs_mule.c
-enc/encdb.c
-enc/euc_jp.c
-enc/euc_kr.c
-enc/euc_tw.c
-enc/gb18030.c
-enc/gb2312.c
-enc/gbk.c
-enc/iso_8859_1.c
-enc/iso_8859_10.c
-enc/iso_8859_11.c
-enc/iso_8859_13.c
-enc/iso_8859_14.c
-enc/iso_8859_15.c
-enc/iso_8859_16.c
-enc/iso_8859_2.c
-enc/iso_8859_3.c
-enc/iso_8859_4.c
-enc/iso_8859_5.c
-enc/iso_8859_6.c
-enc/iso_8859_7.c
-enc/iso_8859_8.c
-enc/iso_8859_9.c
-enc/koi8_r.c
-enc/koi8_u.c
-enc/shift_jis.c
-enc/unicode.c
-enc/us_ascii.c
-enc/utf_16be.c
-enc/utf_16le.c
-enc/utf_32be.c
-enc/utf_32le.c
-enc/utf_8.c
-enc/windows_1251.c
-
-Oniguruma  ----   (C) K.Kosako <sndgk393 AT ybb DOT ne DOT jp>
-
-http://www.geocities.jp/kosako3/oniguruma/
-http://www.ruby-lang.org/cgi-bin/cvsweb.cgi/oniguruma/
-http://www.freebsd.org/cgi/cvsweb.cgi/ports/devel/oniguruma/
-
-   When this software is partly used or it is distributed with Ruby,
-   this of Ruby follows the license of Ruby.
-
-configure:
+	@(#)subr_prf.c	8.3 (Berkeley) 1/21/94
+
+
+[ccan/build_assert/build_assert.h]
+[ccan/check_type/check_type.h]
+[ccan/container_of/container_of.h]
+[ccan/str/str.h]
+
+  These files are licensed under the {CC0}[https://creativecommons.org/choose/zero/].
+
+[ccan/list/list.h]
+
+  This file is licensed under the {MIT License}[rdoc-ref:@MIT+License].
+
+[coroutine]
+
+  Unless otherwise specified, these files are licensed under the
+  {MIT License}[rdoc-ref:@MIT+License].
+
+[include/ruby/onigmo.h]
+[include/ruby/oniguruma.h]
+[regcomp.c]
+[regenc.c]
+[regenc.h]
+[regerror.c]
+[regexec.c]
+[regint.h]
+[regparse.c]
+[regparse.h]
+[enc/ascii.c]
+[enc/big5.c]
+[enc/cp949.c]
+[enc/emacs_mule.c]
+[enc/encdb.c]
+[enc/euc_jp.c]
+[enc/euc_kr.c]
+[enc/euc_tw.c]
+[enc/gb18030.c]
+[enc/gb2312.c]
+[enc/gbk.c]
+[enc/iso_8859_1.c]
+[enc/iso_8859_10.c]
+[enc/iso_8859_11.c]
+[enc/iso_8859_13.c]
+[enc/iso_8859_14.c]
+[enc/iso_8859_15.c]
+[enc/iso_8859_16.c]
+[enc/iso_8859_2.c]
+[enc/iso_8859_3.c]
+[enc/iso_8859_4.c]
+[enc/iso_8859_5.c]
+[enc/iso_8859_6.c]
+[enc/iso_8859_7.c]
+[enc/iso_8859_8.c]
+[enc/iso_8859_9.c]
+[enc/koi8_r.c]
+[enc/koi8_u.c]
+[enc/shift_jis.c]
+[enc/unicode.c]
+[enc/us_ascii.c]
+[enc/utf_16be.c]
+[enc/utf_16le.c]
+[enc/utf_32be.c]
+[enc/utf_32le.c]
+[enc/utf_8.c]
+[enc/windows_1251.c]
+[enc/windows_31j.c]
+
+  Onigmo (Oniguruma-mod) LICENSE
+
+  >>>
+    Copyright (c) 2002-2009::  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
+    Copyright (c) 2011-2014::  K.Takata  <kentkt AT csc DOT jp>
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+    1. Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+  Oniguruma LICENSE
+
+  >>>
+    Copyright (c) 2002-2009::  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+    1. Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+  * https://github.com/k-takata/Onigmo/
+  * https://github.com/kkos/oniguruma
+  * https://svnweb.freebsd.org/ports/head/devel/oniguruma/
+
+    When this software is partly used or it is distributed with Ruby,
+    this of Ruby follows the license of Ruby.
+
+[enc/windows_1250.c]
+[enc/windows_1252.c]
+
+  >>>
+    Copyright (c) 2006-2007::  Byte      <byte AT mail DOT kna DOT ru>
+                               K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+    1. Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+[enc/cesu_8.c]
+[enc/windows_1253.c]
+[enc/windows_1254.c]
+[enc/windows_1257.c]
+
+  >>>
+    Copyright (c) 2002-2007::  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+    1. Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+[enc/trans/GB/GB12345%UCS.src]
+[enc/trans/GB/UCS%GB12345.src]
+[enc/trans/GB/GB2312%UCS.src]
+[enc/trans/GB/UCS%GB2312.src]
+
+  These files have this explanatory texts.
+
+  >>>
+    This mapping data was created from files provided by Unicode, Inc.
+    (The Unicode Consortium). The files were used to create a product supporting
+    Unicode, as explicitly permitted in the files' copyright notices.
+    Please note that Unicode, Inc. never made any claims as to fitness of these
+    files for any particular purpose, and has ceased to publish the files many
+    years ago.
+
+[enc/trans/JIS/JISX0201-KANA%UCS.src]
+[enc/trans/JIS/JISX0208\@1990%UCS.src]
+[enc/trans/JIS/JISX0212%UCS.src]
+[enc/trans/JIS/UCS%JISX0201-KANA.src]
+[enc/trans/JIS/UCS%JISX0208@1990.src]
+[enc/trans/JIS/UCS%JISX0212.src]
+
+  These files are copyrighted as the following.
+
+  >>>
+    © 2015 Unicode®, Inc.
+
+    For terms of use, see http://www.unicode.org/terms_of_use.html
+
+[enc/trans/JIS/JISX0213-1%UCS@BMP.src]
+[enc/trans/JIS/JISX0213-1%UCS@SIP.src]
+[enc/trans/JIS/JISX0213-2%UCS@BMP.src]
+[enc/trans/JIS/JISX0213-2%UCS@SIP.src]
+
+  These files are copyrighted as the following.
+
+  >>>
+    Copyright (C) 2001:: earthian@tama.or.jp, All Rights Reserved.
+    Copyright (C) 2001:: I'O, All Rights Reserved.
+    Copyright (C) 2006:: Project X0213, All Rights Reserved.
+    You can use, modify, distribute this table freely.
+
+[enc/trans/JIS/UCS@BMP%JISX0213-1.src]
+[enc/trans/JIS/UCS@BMP%JISX0213-2.src]
+[enc/trans/JIS/UCS@SIP%JISX0213-1.src]
+[enc/trans/JIS/UCS@SIP%JISX0213-2.src]
+
+  These files are copyrighted as the following.
+
+  >>>
+    Copyright (C) 2001:: earthian@tama.or.jp, All Rights Reserved.
+    Copyright (C) 2001:: I'O, All Rights Reserved.
+    You can use, modify, distribute this table freely.
+
+[enc/trans/ucm/glibc-BIG5-2.3.3.ucm]
+[enc/trans/ucm/glibc-BIG5HKSCS-2.3.3.ucm]
+
+  >>>
+    Copyright (C) 2001-2005:: International Business Machines
+                              Corporation and others.  All Rights Reserved.
+
+[enc/trans/ucm/windows-950-2000.ucm]
+[enc/trans/ucm/windows-950_hkscs-2001.ucm]
+
+  >>>
+    Copyright (C) 2001-2002:: International Business Machines
+                              Corporation and others.  All Rights Reserved.
+
+
+[configure]
 
   This file is free software.
 
-    Copyright (C) 1992, 93, 94, 95, 96 Free Software Foundation, Inc.
+  >>>
+    Copyright (C) 1992-1996, 1998-2012:: Free Software Foundation, Inc.
 
     This configure script is free software; the Free Software Foundation
     gives unlimited permission to copy, distribute and modify it.
 
-tool/config.guess:
-tool/config.sub:
+[tool/config.guess]
+[tool/config.sub]
 
   As long as you distribute these files with the file configure, they
   are covered under the Ruby's license.
 
-      Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
-      Free Software Foundation, Inc.
+  >>>
+    Copyright 1992-2018:: Free Software Foundation, Inc.
 
     This file is free software; you can redistribute it and/or modify it
     under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
+    the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful, but
@@ -119,54 +334,85 @@ tool/config.sub:
     General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+    along with this program; if not, see <https://www.gnu.org/licenses/>.
 
     As a special exception to the GNU General Public License, if you
     distribute this file as part of a program that contains a
     configuration script generated by Autoconf, you may include it under
-    the same distribution terms that you use for the rest of that program.
-
-parse.c:
-
-  This file is licensed under the GPL, but is incorporated into Ruby and
+    the same distribution terms that you use for the rest of that
+    program.  This Exception is an additional permission under section 7
+    of the GNU General Public License, version 3 ("GPLv3").
+
+[tool/lib/test/*]
+[tool/lib/core_assertions.rb]
+
+  Some of methods on these files are based on MiniTest 4. MiniTest 4 is
+  distributed under the MIT License.
+
+  >>>
+    Copyright (c) Ryan Davis, seattle.rb
+
+    Permission is hereby granted, free of charge, to any person obtaining
+    a copy of this software and associated documentation files (the
+    'Software'), to deal in the Software without restriction, including
+    without limitation the rights to use, copy, modify, merge, publish,
+    distribute, sublicense, and/or sell copies of the Software, and to
+    permit persons to whom the Software is furnished to do so, subject to
+    the following conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+    IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+    CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+    TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+    SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+[parse.c]
+[parse.h]
+
+  These files are licensed under the GPL, but are incorporated into Ruby and
   redistributed under the terms of the Ruby license, as permitted by the
   exception to the GPL below.
 
-     Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
-     Free Software Foundation, Inc.
+  >>>
+    Copyright (C) 1984, 1989-1990, 2000-2015, 2018:: Free Software Foundation, Inc.
 
-     This program is free software; you can redistribute it and/or modify
-     it under the terms of the GNU General Public License as published by
-     the Free Software Foundation; either version 2, or (at your option)
-     any later version.
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
 
-     This program is distributed in the hope that it will be useful,
-     but WITHOUT ANY WARRANTY; without even the implied warranty of
-     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-     GNU General Public License for more details.
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
 
-     You should have received a copy of the GNU General Public License
-     along with this program; if not, write to the Free Software
-     Foundation, Inc., 51 Franklin Street, Fifth Floor,
-     Boston, MA 02110-1301, USA.  */
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-  /* As a special exception, you may create a larger work that contains
-     part or all of the Bison parser skeleton and distribute that work
-     under terms of your choice, so long as that work isn't itself a
-     parser generator using the skeleton or a modified version thereof
-     as a parser skeleton.  Alternatively, if you modify or redistribute
-     the parser skeleton itself, you may (at your option) remove this
-     special exception, which will cause the skeleton and the resulting
-     Bison output files to be licensed under the GNU General Public
-     License without this special exception.
+    As a special exception, you may create a larger work that contains
+    part or all of the Bison parser skeleton and distribute that work
+    under terms of your choice, so long as that work isn't itself a
+    parser generator using the skeleton or a modified version thereof
+    as a parser skeleton.  Alternatively, if you modify or redistribute
+    the parser skeleton itself, you may (at your option) remove this
+    special exception, which will cause the skeleton and the resulting
+    Bison output files to be licensed under the GNU General Public
+    License without this special exception.
 
-     This special exception was added by the Free Software Foundation in
-     version 2.2 of Bison.  */
+    This special exception was added by the Free Software Foundation in
+    version 2.2 of Bison.
 
-util.c (partly):
+[missing/dtoa.c]
 
-    Copyright (c) 1991, 2000, 2001 by Lucent Technologies.
+  This file is under these licenses.
+
+  >>>
+    Copyright (c) 1991, 2000, 2001:: by Lucent Technologies.
 
     Permission to use, copy, modify, and distribute this software for any
     purpose without fee is hereby granted, provided that this entire notice
@@ -179,71 +425,74 @@ util.c (partly):
     REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
     OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
 
-win32/win32.[ch]:
+  >>>
+    Copyright (c) 2004-2008:: David Schultz <das@FreeBSD.ORG>
+                              All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+    1. Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+[win32/win32.c]
+[include/ruby/win32.h]
 
   You can apply the Artistic License to these files. (or GPL,
   alternatively)
 
-    Copyright (c) 1993, Intergraph Corporation
+  >>>
+    Copyright (c) 1993:: Intergraph Corporation
 
     You may distribute under the terms of either the GNU General Public
     License or the Artistic License, as specified in the perl README file.
 
-util.c (partly):
-
-   Copyright (c) 2004-2008 David Schultz <das@FreeBSD.ORG>
-   All rights reserved.
-
-   Redistribution and use in source and binary forms, with or without
-   modification, are permitted provided that the following conditions
-   are met:
-   1. Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-   2. Redistributions in binary form must reproduce the above copyright
-      notice, this list of conditions and the following disclaimer in the
-      documentation and/or other materials provided with the distribution.
-
-   THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
-   ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-   ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
-   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-   OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-   LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-   OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-   SUCH DAMAGE.
-
-random.c
+[missing/mt19937.c]
 
   This file is under the new-style BSD license.
 
-    A C-program for MT19937, with initialization improved 2002/2/10.
+  >>>
+    A C-program for MT19937, with initialization improved 2002/2/10.::
     Coded by Takuji Nishimura and Makoto Matsumoto.
+
     This is a faster version by taking Shawn Cokus's optimization,
     Matthe Bellew's simplification, Isaku Wada's real version.
 
     Before using, initialize the state by using init_genrand(seed)
     or init_by_array(init_key, key_length).
 
-    Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
-    All rights reserved.
+    Copyright (C) 1997 - 2002:: Makoto Matsumoto and Takuji Nishimura,
+                                All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
     modification, are permitted provided that the following conditions
     are met:
 
-      1. Redistributions of source code must retain the above copyright
-	 notice, this list of conditions and the following disclaimer.
+    1. Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
 
-      2. Redistributions in binary form must reproduce the above copyright
-	 notice, this list of conditions and the following disclaimer in the
-	 documentation and/or other materials provided with the distribution.
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
 
-      3. The names of its contributors may not be used to endorse or promote
-	 products derived from this software without specific prior written
-	 permission.
+    3. The names of its contributors may not be used to endorse or promote
+       products derived from this software without specific prior written
+       permission.
 
     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
@@ -262,44 +511,15 @@ random.c
     http://www.math.keio.ac.jp/matumoto/emt.html
     email: matumoto@math.keio.ac.jp
 
-vm_dump.c:procstat_vm
-
- * Copyright (c) 2007 Robert N. M. Watson
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $FreeBSD: head/usr.bin/procstat/procstat_vm.c 261780 2014-02-11 21:57:37Z jhb $
-
-vsnprintf.c:
-
-  This file is under the old-style BSD license.  Note that the
-  paragraph 3 below is now null and void.
-
-    Copyright (c) 1990, 1993
-         The Regents of the University of California.  All rights reserved.
+  The Wayback Machine url: http://web.archive.org/web/19990429082237/http://www.math.keio.ac.jp/matumoto/emt.html
 
-    This code is derived from software contributed to Berkeley by
-    Chris Torek.
+[missing/procstat_vm.c]
+
+  This file is under the new-style BSD license.
+
+  >>>
+    Copyright (c) 2007:: Robert N. M. Watson
+                         All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
     modification, are permitted provided that the following conditions
@@ -309,14 +529,11 @@ vsnprintf.c:
     2. Redistributions in binary form must reproduce the above copyright
        notice, this list of conditions and the following disclaimer in the
        documentation and/or other materials provided with the distribution.
-    3. Neither the name of the University nor the names of its contributors
-       may be used to endorse or promote products derived from this software
-       without specific prior written permission.
 
-    THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+    THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-    ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+    ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
@@ -325,146 +542,100 @@ vsnprintf.c:
     OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     SUCH DAMAGE.
 
-    IMPORTANT NOTE:
-    --------------
-    From ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
-    paragraph 3 above is now null and void.
-
-st.[ch]:
-missing/alloca.c:
-missing/dup2.c:
-missing/erf.c:
-missing/finite.c:
-missing/hypot.c:
-missing/isinf.c:
-missing/isnan.c:
-missing/lgamma_r.c:
-missing/memcmp.c:
-missing/memmove.c:
-missing/strchr.c:
-missing/strstr.c:
-missing/strtol.c:
-missing/tgamma.c:
-ext/digest/sha1/sha1.[ch]:
+    $FreeBSD: head/usr.bin/procstat/procstat_vm.c 261780 2014-02-11 21:57:37Z jhb $
+
+[vsnprintf.c]
+
+  This file is under the {old-style BSD license}[rdoc-ref:@Old-style+BSD+license].
+
+  >>>
+    Copyright (c) 1990, 1993::
+    The Regents of the University of California.  All rights reserved.
+
+    This code is derived from software contributed to Berkeley by
+    Chris Torek.
+
+[st.c]
+[strftime.c]
+[include/ruby/st.h]
+[missing/acosh.c]
+[missing/alloca.c]
+[missing/erf.c]
+[missing/hypot.c]
+[missing/lgamma_r.c]
+[missing/memcmp.c]
+[missing/memmove.c]
+[missing/strchr.c]
+[missing/strerror.c]
+[missing/strstr.c]
+[missing/tgamma.c]
+[ext/date/date_strftime.c]
+[ext/digest/sha1/sha1.c]
+[ext/digest/sha1/sha1.h]
 
   These files are all under public domain.
 
-missing/crypt.c:
+[missing/crypt.c]
 
-  This file is under the old-style BSD license.  Note that the
-  paragraph 3 below is now null and void.
+  This file is under the {old-style BSD license}[rdoc-ref:@Old-style+BSD+license].
 
-    Copyright (c) 1989, 1993
-    	The Regents of the University of California.  All rights reserved.
+  >>>
+    Copyright (c) 1989, 1993::
+    The Regents of the University of California.  All rights reserved.
 
     This code is derived from software contributed to Berkeley by
     Tom Truscott.
 
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in the
-       documentation and/or other materials provided with the distribution.
-    3. Neither the name of the University nor the names of its contributors
-       may be used to endorse or promote products derived from this software
-       without specific prior written permission.
-
-    THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-    ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-    SUCH DAMAGE.
+[missing/setproctitle.c]
 
-missing/setproctitle.c
+  This file is under the {old-style BSD license}[rdoc-ref:@Old-style+BSD+license].
 
-  This file is under the old-style BSD license.  Note that the
-  paragraph 3 below is now null and void.
+  >>>
+    Copyright 2003:: Damien Miller
+    Copyright (c) 1983, 1995-1997:: Eric P. Allman
+    Copyright (c) 1988, 1993::
+    The Regents of the University of California.  All rights reserved.
 
-    Copyright 2003 Damien Miller
-    Copyright (c) 1983, 1995-1997 Eric P. Allman
-    Copyright (c) 1988, 1993
-    	The Regents of the University of California.  All rights reserved.
+[missing/strlcat.c]
+[missing/strlcpy.c]
 
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in the
-       documentation and/or other materials provided with the distribution.
-    3. Neither the name of the University nor the names of its contributors
-       may be used to endorse or promote products derived from this software
-       without specific prior written permission.
+  These files are under an ISC-style license.
 
-    THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-    ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-    SUCH DAMAGE.
+  >>>
+    Copyright (c) 1998, 2015:: Todd C. Miller <Todd.Miller@courtesan.com>
 
-missing/strlcat.c
-missing/strlcpy.c
+    Permission to use, copy, modify, and distribute this software for any
+    purpose with or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
 
-  These files are under the new-style BSD license.
+    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
-   Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
-   All rights reserved.
-
-   Redistribution and use in source and binary forms, with or without
-   modification, are permitted provided that the following conditions
-   are met:
-   1. Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-   2. Redistributions in binary form must reproduce the above copyright
-      notice, this list of conditions and the following disclaimer in the
-      documentation and/or other materials provided with the distribution.
-   3. The name of the author may not be used to endorse or promote products
-      derived from this software without specific prior written permission.
-
-   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
-   INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
-   AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
-   THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
-   OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
-   OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-   ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-missing/langinfo.c
+[missing/langinfo.c]
 
   This file is from http://www.cl.cam.ac.uk/~mgk25/ucs/langinfo.c.
   Ruby uses a modified version. The file contains the following
   author/copyright notice:
 
-  Markus.Kuhn@cl.cam.ac.uk -- 2002-03-11
-  Permission to use, copy, modify, and distribute this software
-  for any purpose and without fee is hereby granted. The author
-  disclaims all warranties with regard to this software.
+  >>>
+    Markus.Kuhn@cl.cam.ac.uk -- 2002-03-11::
+    Permission to use, copy, modify, and distribute this software
+    for any purpose and without fee is hereby granted. The author
+    disclaims all warranties with regard to this software.
 
-ext/digest/md5/md5.[ch]:
+[ext/digest/md5/md5.c]
+[ext/digest/md5/md5.h]
 
   These files are under the following license.  Ruby uses modified
   versions of them.
 
-    Copyright (C) 1999, 2000 Aladdin Enterprises.  All rights reserved.
+  >>>
+    Copyright (C) 1999, 2000:: Aladdin Enterprises.  All rights reserved.
 
     This software is provided 'as-is', without any express or implied
     warranty.  In no event will the authors be held liable for any damages
@@ -485,23 +656,27 @@ ext/digest/md5/md5.[ch]:
     L. Peter Deutsch
     ghost@aladdin.com
 
-ext/digest/rmd160/rmd160.[ch]:
+[ext/digest/rmd160/rmd160.c]
+[ext/digest/rmd160/rmd160.h]
 
   These files have the following copyright information, and by the
   author we are allowed to use it under the new-style BSD license.
 
-    AUTHOR:   Antoon Bosselaers, ESAT-COSIC
+  >>>
+    AUTHOR::  Antoon Bosselaers, ESAT-COSIC
               (Arranged for libc by Todd C. Miller)
-    DATE:     1 March 1996
+    DATE::    1 March 1996
 
-    Copyright (c) Katholieke Universiteit Leuven
+    Copyright (c):: Katholieke Universiteit Leuven
     1996, All Rights Reserved
 
-ext/digest/sha2/sha2.[ch]:
+[ext/digest/sha2/sha2.c]
+[ext/digest/sha2/sha2.h]
 
   These files are under the new-style BSD license.
 
-    Copyright 2000 Aaron D. Gifford.  All rights reserved.
+  >>>
+    Copyright 2000:: Aaron D. Gifford.  All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
     modification, are permitted provided that the following conditions
@@ -527,29 +702,71 @@ ext/digest/sha2/sha2.[ch]:
     OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     SUCH DAMAGE.
 
-ext/nkf/nkf-utf8/config.h:
-ext/nkf/nkf-utf8/nkf.c:
-ext/nkf/nkf-utf8/utf8tbl.c:
+[ext/json/vendor/fpconv.c]
+
+  This file is under the {Boost Software License}[rdoc-ref:@Boost+Software+License+1.0].
+
+[ext/json/vendor/jeaiii-ltoa.h]
+
+  >>>
+    Copyright (c) 2024,2025 Enrico Thierbach - https://github.com/radiospiel
+    Copyright (c) 2022 James Edward Anhalt III - https://github.com/jeaiii/itoa
+
+    {MIT License}[rdoc-ref:@MIT+License]
+
+[ext/json/vendor/ryu.h]
+  This file is adapted from the Ryu algorithm by Ulf Adams https://github.com/ulfjack/ryu.
+  It is dual-licensed under {Apache License 2.0}[rdoc-ref:@Apache+License+2.0] OR
+  {Boost Software License 1.0}[rdoc-ref:@Boost+Software+License+1.0].
+
+[ext/psych]
+[test/psych]
 
-  These files are under the following license.  So to speak, it is
-  copyrighted semi-public-domain software.
+  The files under these directories are under the following license.
 
-    Copyright (C) 1987, Fujitsu LTD. (Itaru ICHIKAWA)
-       Everyone is permitted to do anything on this program
-       including copying, modifying, improving,
-       as long as you don't try to pretend that you wrote it.
-       i.e., the above copyright notice has to appear in all copies.
-       Binary distribution requires original version messages.
-       You don't have to ask before copying, redistribution or publishing.
-       THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE.
+  >>>
+    Copyright 2009:: Aaron Patterson, et al.
 
-ext/socket/addrinfo.h:
-ext/socket/getaddrinfo.c:
-ext/socket/getnameinfo.c:
+    Permission is hereby granted, free of charge, to any person obtaining a copy of
+    this software and associated documentation files (the 'Software'), to deal in
+    the Software without restriction, including without limitation the rights to
+    use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+    of the Software, and to permit persons to whom the Software is furnished to do
+    so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+
+[ext/pty/pty.c]
+
+  >>>
+    C) Copyright 1998:: by Akinori Ito.
+
+    This software may be redistributed freely for this purpose, in full
+    or in part, provided that this entire copyright notice is included
+    on any copies of this software and applications and derivations thereof.
+
+    This software is provided on an "as is" basis, without warranty of any
+    kind, either expressed or implied, as to any matter including, but not
+    limited to warranty of fitness of purpose, or merchantability, or
+    results obtained from use of this software.
+
+[ext/socket/addrinfo.h]
+[ext/socket/getaddrinfo.c]
+[ext/socket/getnameinfo.c]
 
   These files are under the new-style BSD license.
 
-    Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
+  >>>
+    Copyright (C) 1995, 1996, 1997, 1998, and 1999:: WIDE Project.
     All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
@@ -576,17 +793,508 @@ ext/socket/getnameinfo.c:
     OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     SUCH DAMAGE.
 
-ext/win32ole/win32ole.c:
+[ext/win32ole/win32ole.c]
 
   You can apply the Artistic License to this file. (or GPL,
   alternatively)
 
-    (c) 1995 Microsoft Corporation. All rights reserved.
+  >>>
+    (c) 1995:: Microsoft Corporation. All rights reserved.
     Developed by ActiveWare Internet Corp., http://www.ActiveWare.com
 
-    Other modifications Copyright (c) 1997, 1998 by Gurusamy Sarathy
+    Other modifications Copyright (c) 1997, 1998:: by Gurusamy Sarathy
     <gsar@umich.edu> and Jan Dubois <jan.dubois@ibm.net>
 
     You may distribute under the terms of either the GNU General Public
     License or the Artistic License, as specified in the README file
     of the Perl distribution.
+
+  The Wayback Machine url: http://web.archive.org/web/19970607104352/http://www.activeware.com:80/
+
+[lib/rdoc/generator/template/darkfish/css/fonts.css]
+
+  This file is licensed under the {SIL Open Font License}[http://scripts.sil.org/OFL].
+
+[spec/mspec]
+[spec/ruby]
+
+  The files under these directories are under the following license.
+
+  >>>
+    Copyright (c) 2008:: Engine Yard, Inc. All rights reserved.
+
+    Permission is hereby granted, free of charge, to any person
+    obtaining a copy of this software and associated documentation
+    files (the "Software"), to deal in the Software without
+    restriction, including without limitation the rights to use,
+    copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following
+    conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+    OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+    HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+    WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+    OTHER DEALINGS IN THE SOFTWARE.
+
+[lib/rubygems.rb]
+[lib/rubygems]
+[test/rubygems]
+
+  RubyGems is under the following license.
+
+  >>>
+    RubyGems is copyrighted free software by Chad Fowler, Rich Kilmer, Jim
+    Weirich and others.  You can redistribute it and/or modify it under
+    either the terms of the {MIT license}[rdoc-ref:@MIT+License], or the conditions
+    below:
+
+    1. You may make and give away verbatim copies of the source form of the
+       software without restriction, provided that you duplicate all of the
+       original copyright notices and associated disclaimers.
+
+    2. You may modify your copy of the software in any way, provided that
+       you do at least ONE of the following:
+
+       a. place your modifications in the Public Domain or otherwise
+          make them Freely Available, such as by posting said
+          modifications to Usenet or an equivalent medium, or by allowing
+          the author to include your modifications in the software.
+
+       b. use the modified software only within your corporation or
+          organization.
+
+       c. give non-standard executables non-standard names, with
+          instructions on where to get the original software distribution.
+
+       d. make other distribution arrangements with the author.
+
+    3. You may distribute the software in object code or executable
+       form, provided that you do at least ONE of the following:
+
+       a. distribute the executables and library files of the software,
+          together with instructions (in the manual page or equivalent)
+          on where to get the original distribution.
+
+       b. accompany the distribution with the machine-readable source of
+          the software.
+
+       c. give non-standard executables non-standard names, with
+          instructions on where to get the original software distribution.
+
+       d. make other distribution arrangements with the author.
+
+    4. You may modify and include the part of the software into any other
+       software (possibly commercial).
+
+    5. The scripts and library files supplied as input to or produced as
+       output from the software do not automatically fall under the
+       copyright of the software, but belong to whomever generated them,
+       and may be sold commercially, and may be aggregated with this
+       software.
+
+    6. THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
+       IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+       WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+       PURPOSE.
+
+[lib/bundler]
+[lib/bundler.rb]
+[spec/bundler]
+
+  Bundler is under the following license.
+
+  >>>
+    Portions copyright (c) 2010:: Andre Arko
+    Portions copyright (c) 2009:: Engine Yard
+
+    {MIT License}[rdoc-ref:@MIT+License]
+
+[lib/bundler/vendor/thor]
+
+  Thor is under the following license.
+
+  >>>
+    Copyright (c) 2008 Yehuda Katz, Eric Hodel, et al.
+
+    {MIT License}[rdoc-ref:@MIT+License]
+
+[lib/rubygems/vendor/molinillo]
+
+  molinillo is under the following license.
+
+  >>>
+    Copyright (c) 2014 Samuel E. Giddins segiddins@segiddins.me
+
+    {MIT License}[rdoc-ref:@MIT+License]
+
+[lib/bundler/vendor/pub_grub]
+
+  pub_grub is under the following license.
+
+  >>>
+    Copyright (c) 2018 John Hawthorn
+
+    {MIT License}[rdoc-ref:@MIT+License]
+
+[lib/bundler/vendor/connection_pool]
+
+  connection_pool is under the following license.
+
+  >>>
+    Copyright (c) 2011 Mike Perham
+
+    {MIT License}[rdoc-ref:@MIT+License]
+
+[lib/bundler/vendor/net-http-persistent]
+
+  net-http-persistent is under the following license.
+
+  >>>
+    Copyright (c) Eric Hodel, Aaron Patterson
+
+    {MIT License}[rdoc-ref:@MIT+License]
+
+[lib/did_you_mean]
+[lib/did_you_mean.rb]
+[test/did_you_mean]
+
+  did_you_mean is under the following license.
+
+  >>>
+    Copyright (c) 2014-2016 Yuki Nishijima
+
+    {MIT License}[rdoc-ref:@MIT+License]
+
+[lib/error_highlight]
+[lib/error_highlight.rb]
+[test/error_highlight]
+
+  error_highlight is under the following license.
+
+  >>>
+    Copyright (c) 2021 Yusuke Endoh
+
+    {MIT License}[rdoc-ref:@MIT+License]
+
+[benchmark/so_ackermann.rb]
+[benchmark/so_array.rb]
+[benchmark/so_binary_trees.rb]
+[benchmark/so_concatenate.rb]
+[benchmark/so_count_words.yml]
+[benchmark/so_exception.rb]
+[benchmark/so_fannkuch.rb]
+[benchmark/so_fasta.rb]
+[benchmark/so_k_nucleotide.yml]
+[benchmark/so_lists.rb]
+[benchmark/so_mandelbrot.rb]
+[benchmark/so_matrix.rb]
+[benchmark/so_meteor_contest.rb]
+[benchmark/so_nbody.rb]
+[benchmark/so_nested_loop.rb]
+[benchmark/so_nsieve.rb]
+[benchmark/so_nsieve_bits.rb]
+[benchmark/so_object.rb]
+[benchmark/so_partial_sums.rb]
+[benchmark/so_pidigits.rb]
+[benchmark/so_random.rb]
+[benchmark/so_reverse_complement.yml]
+[benchmark/so_sieve.rb]
+[benchmark/so_spectralnorm.rb]
+
+  These files are very old copy of then-called "The Great Computer Language
+  Shootout".  LEGAL SITUATION OF THESE FILES ARE UNCLEAR because the original
+  site has been lost.  Upstream diverged to delete several benchmarks listed
+  above.
+
+== MIT License
+>>>
+      Permission is hereby granted, free of charge, to any person obtaining
+      a copy of this software and associated documentation files (the
+      "Software"), to deal in the Software without restriction, including
+      without limitation the rights to use, copy, modify, merge, publish,
+      distribute, sublicense, and/or sell copies of the Software, and to
+      permit persons to whom the Software is furnished to do so, subject to
+      the following conditions:
+
+      The above copyright notice and this permission notice shall be
+      included in all copies or substantial portions of the Software.
+
+      THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+      EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+      MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+      NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+      LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+      OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+      WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+== Old-style BSD license
+>>>
+      Redistribution and use in source and binary forms, with or without
+      modification, are permitted provided that the following conditions
+      are met:
+      1. Redistributions of source code must retain the above copyright
+         notice, this list of conditions and the following disclaimer.
+      2. Redistributions in binary form must reproduce the above copyright
+         notice, this list of conditions and the following disclaimer in the
+         documentation and/or other materials provided with the distribution.
+      3. Neither the name of the University nor the names of its contributors
+         may be used to endorse or promote products derived from this software
+         without specific prior written permission.
+
+      THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+      ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+      IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+      ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+      FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+      DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+      OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+      HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+      LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+      OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+      SUCH DAMAGE.
+
+      IMPORTANT NOTE::
+
+      From ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
+      paragraph 3 above is now null and void.
+
+== Boost Software License 1.0
+
+>>>
+      Boost Software License - Version 1.0 - August 17th, 2003
+
+      Permission is hereby granted, free of charge, to any person or organization
+      obtaining a copy of the software and accompanying documentation covered by
+      this license (the "Software") to use, reproduce, display, distribute,
+      execute, and transmit the Software, and to prepare derivative works of the
+      Software, and to permit third-parties to whom the Software is furnished to
+      do so, all subject to the following:
+
+      The copyright notices in the Software and this entire statement, including
+      the above license grant, this restriction and the following disclaimer,
+      must be included in all copies of the Software, in whole or in part, and
+      all derivative works of the Software, unless such copies or derivative
+      works are solely in the form of machine-executable object code generated by
+      a source language processor.
+
+      THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+      IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+      FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+      SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+      FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+      ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+      DEALINGS IN THE SOFTWARE.
+
+== Apache License 2.0
+
+>>>
+      Apache License
+      Version 2.0, January 2004
+      http://www.apache.org/licenses/
+
+      TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+      1. Definitions.
+
+         "License" shall mean the terms and conditions for use, reproduction,
+         and distribution as defined by Sections 1 through 9 of this document.
+
+         "Licensor" shall mean the copyright owner or entity authorized by
+         the copyright owner that is granting the License.
+
+         "Legal Entity" shall mean the union of the acting entity and all
+         other entities that control, are controlled by, or are under common
+         control with that entity. For the purposes of this definition,
+         "control" means (i) the power, direct or indirect, to cause the
+         direction or management of such entity, whether by contract or
+         otherwise, or (ii) ownership of fifty percent (50%) or more of the
+         outstanding shares, or (iii) beneficial ownership of such entity.
+
+         "You" (or "Your") shall mean an individual or Legal Entity
+         exercising permissions granted by this License.
+
+         "Source" form shall mean the preferred form for making modifications,
+         including but not limited to software source code, documentation
+         source, and configuration files.
+
+         "Object" form shall mean any form resulting from mechanical
+         transformation or translation of a Source form, including but
+         not limited to compiled object code, generated documentation,
+         and conversions to other media types.
+
+         "Work" shall mean the work of authorship, whether in Source or
+         Object form, made available under the License, as indicated by a
+         copyright notice that is included in or attached to the work
+         (an example is provided in the Appendix below).
+
+         "Derivative Works" shall mean any work, whether in Source or Object
+         form, that is based on (or derived from) the Work and for which the
+         editorial revisions, annotations, elaborations, or other modifications
+         represent, as a whole, an original work of authorship. For the purposes
+         of this License, Derivative Works shall not include works that remain
+         separable from, or merely link (or bind by name) to the interfaces of,
+         the Work and Derivative Works thereof.
+
+         "Contribution" shall mean any work of authorship, including
+         the original version of the Work and any modifications or additions
+         to that Work or Derivative Works thereof, that is intentionally
+         submitted to Licensor for inclusion in the Work by the copyright owner
+         or by an individual or Legal Entity authorized to submit on behalf of
+         the copyright owner. For the purposes of this definition, "submitted"
+         means any form of electronic, verbal, or written communication sent
+         to the Licensor or its representatives, including but not limited to
+         communication on electronic mailing lists, source code control systems,
+         and issue tracking systems that are managed by, or on behalf of, the
+         Licensor for the purpose of discussing and improving the Work, but
+         excluding communication that is conspicuously marked or otherwise
+         designated in writing by the copyright owner as "Not a Contribution."
+
+         "Contributor" shall mean Licensor and any individual or Legal Entity
+         on behalf of whom a Contribution has been received by Licensor and
+         subsequently incorporated within the Work.
+
+      2. Grant of Copyright License. Subject to the terms and conditions of
+         this License, each Contributor hereby grants to You a perpetual,
+         worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+         copyright license to reproduce, prepare Derivative Works of,
+         publicly display, publicly perform, sublicense, and distribute the
+         Work and such Derivative Works in Source or Object form.
+
+      3. Grant of Patent License. Subject to the terms and conditions of
+         this License, each Contributor hereby grants to You a perpetual,
+         worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+         (except as stated in this section) patent license to make, have made,
+         use, offer to sell, sell, import, and otherwise transfer the Work,
+         where such license applies only to those patent claims licensable
+         by such Contributor that are necessarily infringed by their
+         Contribution(s) alone or by combination of their Contribution(s)
+         with the Work to which such Contribution(s) was submitted. If You
+         institute patent litigation against any entity (including a
+         cross-claim or counterclaim in a lawsuit) alleging that the Work
+         or a Contribution incorporated within the Work constitutes direct
+         or contributory patent infringement, then any patent licenses
+         granted to You under this License for that Work shall terminate
+         as of the date such litigation is filed.
+
+      4. Redistribution. You may reproduce and distribute copies of the
+         Work or Derivative Works thereof in any medium, with or without
+         modifications, and in Source or Object form, provided that You
+         meet the following conditions:
+
+         a.  You must give any other recipients of the Work or
+             Derivative Works a copy of this License; and
+
+         b.  You must cause any modified files to carry prominent notices
+             stating that You changed the files; and
+
+         c.  You must retain, in the Source form of any Derivative Works
+             that You distribute, all copyright, patent, trademark, and
+             attribution notices from the Source form of the Work,
+             excluding those notices that do not pertain to any part of
+             the Derivative Works; and
+
+         d.  If the Work includes a "NOTICE" text file as part of its
+             distribution, then any Derivative Works that You distribute must
+             include a readable copy of the attribution notices contained
+             within such NOTICE file, excluding those notices that do not
+             pertain to any part of the Derivative Works, in at least one
+             of the following places: within a NOTICE text file distributed
+             as part of the Derivative Works; within the Source form or
+             documentation, if provided along with the Derivative Works; or,
+             within a display generated by the Derivative Works, if and
+             wherever such third-party notices normally appear. The contents
+             of the NOTICE file are for informational purposes only and
+             do not modify the License. You may add Your own attribution
+             notices within Derivative Works that You distribute, alongside
+             or as an addendum to the NOTICE text from the Work, provided
+             that such additional attribution notices cannot be construed
+             as modifying the License.
+
+         You may add Your own copyright statement to Your modifications and
+         may provide additional or different license terms and conditions
+         for use, reproduction, or distribution of Your modifications, or
+         for any such Derivative Works as a whole, provided Your use,
+         reproduction, and distribution of the Work otherwise complies with
+         the conditions stated in this License.
+
+      5. Submission of Contributions. Unless You explicitly state otherwise,
+         any Contribution intentionally submitted for inclusion in the Work
+         by You to the Licensor shall be under the terms and conditions of
+         this License, without any additional terms or conditions.
+         Notwithstanding the above, nothing herein shall supersede or modify
+         the terms of any separate license agreement you may have executed
+         with Licensor regarding such Contributions.
+
+      6. Trademarks. This License does not grant permission to use the trade
+         names, trademarks, service marks, or product names of the Licensor,
+         except as required for reasonable and customary use in describing the
+         origin of the Work and reproducing the content of the NOTICE file.
+
+      7. Disclaimer of Warranty. Unless required by applicable law or
+         agreed to in writing, Licensor provides the Work (and each
+         Contributor provides its Contributions) on an "AS IS" BASIS,
+         WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+         implied, including, without limitation, any warranties or conditions
+         of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+         PARTICULAR PURPOSE. You are solely responsible for determining the
+         appropriateness of using or redistributing the Work and assume any
+         risks associated with Your exercise of permissions under this License.
+
+      8. Limitation of Liability. In no event and under no legal theory,
+         whether in tort (including negligence), contract, or otherwise,
+         unless required by applicable law (such as deliberate and grossly
+         negligent acts) or agreed to in writing, shall any Contributor be
+         liable to You for damages, including any direct, indirect, special,
+         incidental, or consequential damages of any character arising as a
+         result of this License or out of the use or inability to use the
+         Work (including but not limited to damages for loss of goodwill,
+         work stoppage, computer failure or malfunction, or any and all
+         other commercial damages or losses), even if such Contributor
+         has been advised of the possibility of such damages.
+
+      9. Accepting Warranty or Additional Liability. While redistributing
+         the Work or Derivative Works thereof, You may choose to offer,
+         and charge a fee for, acceptance of support, warranty, indemnity,
+         or other liability obligations and/or rights consistent with this
+         License. However, in accepting such obligations, You may act only
+         on Your own behalf and on Your sole responsibility, not on behalf
+         of any other Contributor, and only if You agree to indemnify,
+         defend, and hold each Contributor harmless for any liability
+         incurred by, or claims asserted against, such Contributor by reason
+         of your accepting any such warranty or additional liability.
+
+      END OF TERMS AND CONDITIONS
+
+      APPENDIX: How to apply the Apache License to your work.
+
+      >>>
+         To apply the Apache License to your work, attach the following
+         boilerplate notice, with the fields enclosed by brackets "[]"
+         replaced with your own identifying information. (Don't include
+         the brackets!)  The text should be enclosed in the appropriate
+         comment syntax for the file format. We also recommend that a
+         file or class name and description of purpose be included on the
+         same "printed page" as the copyright notice for easier
+         identification within third-party archives.
+
+      Copyright [yyyy] [name of copyright owner]
+
+      Licensed under the Apache License, Version 2.0 (the "License");
+      you may not use this file except in compliance with the License.
+      You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+      Unless required by applicable law or agreed to in writing, software
+      distributed under the License is distributed on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+      See the License for the specific language governing permissions and
+      limitations under the License.
diff --git a/Makefile.in b/Makefile.in
deleted file mode 100644
index 23e193c407..0000000000
--- a/Makefile.in
+++ /dev/null
@@ -1,510 +0,0 @@
-SHELL = /bin/sh
-NULLCMD = @NULLCMD@
-n=$(NULLCMD)
-ECHO1 = $(V:1=$n)
-RUNCMD = $(SHELL)
-CDPATH = .
-CHDIR = @CHDIR@
-exec = exec
-NULL = /dev/null
-PATH_SEPARATOR = @PATH_SEPARATOR@
-
-#### Start of system configuration section. ####
-
-srcdir = @srcdir@
-top_srcdir = $(srcdir)
-hdrdir = $(srcdir)/include
-PLATFORM_DIR = @PLATFORM_DIR@
-
-CC = @CC@
-CPP = @CPP@
-LD = @LD@
-YACC = bison
-PURIFY =
-AUTOCONF = autoconf
-CONFIGURE = @CONFIGURE@
-@SET_MAKE@
-MKFILES = @MAKEFILES@
-BASERUBY = @BASERUBY@
-HAVE_BASERUBY = @HAVE_BASERUBY@
-TEST_RUNNABLE = @TEST_RUNNABLE@
-CROSS_COMPILING = @CROSS_COMPILING@
-DOXYGEN = @DOXYGEN@
-
-prefix = @prefix@
-exec_prefix = @exec_prefix@
-bindir = @bindir@
-sbindir = @sbindir@
-libdir = @libdir@
-libexecdir = @libexecdir@
-datarootdir = @datarootdir@
-datadir = @datadir@
-arch = @arch@
-sitearch = @sitearch@
-sitedir = @sitedir@
-archlibdir = @archlibdir@
-ruby_version = @ruby_version@
-
-TESTUI = console
-TESTS =
-INSTALLDOC = @INSTALLDOC@
-DOCTARGETS = @RDOCTARGET@ @CAPITARGET@
-
-EXTOUT = @EXTOUT@
-arch_hdrdir = $(EXTOUT)/include/$(arch)
-VPATH = $(arch_hdrdir)/ruby:$(hdrdir)/ruby:$(srcdir):$(srcdir)/missing
-
-empty =
-CC_VERSION = @CC_VERSION@
-OUTFLAG = @OUTFLAG@$(empty)
-COUTFLAG = @COUTFLAG@$(empty)
-ARCH_FLAG = @ARCH_FLAG@
-CFLAGS_NO_ARCH = @CFLAGS@
-CFLAGS = $(CFLAGS_NO_ARCH) $(ARCH_FLAG)
-cflags = @cflags@
-optflags = @optflags@
-debugflags = @debugflags@
-warnflags = @warnflags@ @strict_warnflags@
-cppflags = @cppflags@
-INCFLAGS = -I. -I$(arch_hdrdir) -I$(hdrdir) -I$(srcdir)
-XCFLAGS = @XCFLAGS@
-CPPFLAGS = @CPPFLAGS@ $(INCFLAGS)
-LDFLAGS = @STATIC@ $(CFLAGS) @LDFLAGS@
-EXTLDFLAGS = @EXTLDFLAGS@
-XLDFLAGS = @XLDFLAGS@ $(EXTLDFLAGS)
-EXTLIBS =
-LIBS = @LIBS@ $(EXTLIBS)
-MISSING = @LIBOBJS@ @ALLOCA@
-LDSHARED = @LIBRUBY_LDSHARED@
-DLDFLAGS = @LIBRUBY_DLDFLAGS@ $(XLDFLAGS) $(ARCH_FLAG)
-SOLIBS = @SOLIBS@
-MAINLIBS = @MAINLIBS@
-ARCHMINIOBJS = @MINIOBJS@
-DLNOBJ = @DLNOBJ@
-ENCOBJS = @ENCOBJS@
-EXTOBJS = @EXTOBJS@
-BUILTIN_ENCOBJS = @BUILTIN_ENCOBJS@
-BUILTIN_TRANSSRCS = @BUILTIN_TRANSSRCS@
-BUILTIN_TRANSOBJS = @BUILTIN_TRANSOBJS@
-POSTLINK = @POSTLINK@
-
-RUBY_BASE_NAME=@RUBY_BASE_NAME@
-RUBY_PROGRAM_VERSION=@RUBY_PROGRAM_VERSION@
-RUBY_INSTALL_NAME=@RUBY_INSTALL_NAME@
-RUBY_SO_NAME=@RUBY_SO_NAME@
-EXEEXT = @EXEEXT@
-LIBEXT = @LIBEXT@
-PROGRAM=$(RUBY_INSTALL_NAME)$(EXEEXT)
-RUBY = $(RUBY_INSTALL_NAME)
-MINIRUBY = @MINIRUBY@\
-	$(MINIRUBYOPT)
-# RUNRUBY_COMMAND:: runruby.rb or baseruby. do not append options directly
-RUNRUBY_COMMAND = @RUNRUBY_COMMAND@
-# RUNRUBY:: run ruby with RUN_OPTS which is passed to ruby
-RUNRUBY = @RUNRUBY@ $(RUN_OPTS)
-# RUNRUBY_DEBUGGER:: debugging option for runruby.rb
-RUNRUBY_DEBUGGER = --debugger='gdb -x run.gdb --quiet --args'
-XRUBY = @XRUBY@
-BTESTRUBY = @BTESTRUBY@\
-	$(MINIRUBYOPT)
-INSTALL = @INSTALL@
-INSTALL_DATA = @INSTALL_DATA@
-INSTALL_SCRIPT = @INSTALL_SCRIPT@
-INSTALL_PROGRAM = @INSTALL_PROGRAM@
-XRUBY_LIBDIR = @XRUBY_LIBDIR@
-XRUBY_RUBYLIBDIR = @XRUBY_RUBYLIBDIR@
-XRUBY_RUBYHDRDIR = @XRUBY_RUBYHDRDIR@
-BOOTSTRAPRUBY = @BOOTSTRAPRUBY@
-
-#### End of system configuration section. ####
-
-MAJOR=	@MAJOR@
-MINOR=	@MINOR@
-TEENY=	@TEENY@
-
-LIBRUBY_A     = @LIBRUBY_A@
-LIBRUBY_SO    = @LIBRUBY_SO@
-LIBRUBY_ALIASES= @LIBRUBY_ALIASES@
-LIBRUBY	      = @LIBRUBY@
-LIBRUBYARG    = @LIBRUBYARG@
-LIBRUBYARG_STATIC = @LIBRUBYARG_STATIC@
-LIBRUBYARG_SHARED = @LIBRUBYARG_SHARED@
-LIBRUBY_RELATIVE = @LIBRUBY_RELATIVE@
-LIBRUBY_A_OBJS = @LIBRUBY_A_OBJS@
-
-DTRACE_REBUILD_OBJS = $(DTRACE_REBUILD:yes=$(DTRACE_DEPENDENT_OBJS))
-
-DTRACE_DEPENDENT_OBJS = array.$(OBJEXT) \
-			eval.$(OBJEXT) \
-			gc.$(OBJEXT) \
-			hash.$(OBJEXT) \
-			load.$(OBJEXT) \
-			object.$(OBJEXT) \
-			parse.$(OBJEXT) \
-			string.$(OBJEXT) \
-			symbol.$(OBJEXT) \
-			vm.$(OBJEXT)
-
-THREAD_MODEL  = @THREAD_MODEL@
-
-PREP          = @PREP@
-ARCHFILE      = @ARCHFILE@
-SETUP         =
-EXTSTATIC     = @EXTSTATIC@
-ENCSTATIC     = @ENCSTATIC@
-SET_LC_MESSAGES = env LC_MESSAGES=C
-
-MAKEDIRS      = @MKDIR_P@
-CP            = cp
-MV            = mv
-RM            = rm -f
-RMDIR         = @RMDIR@
-RMDIRS        = @RMDIRS@
-RMALL         = @RMALL@
-NM            = @NM@
-AR            = @AR@
-ARFLAGS       = rcu
-RANLIB        = @RANLIB@
-AS            = @AS@
-ASFLAGS       = @ASFLAGS@ $(INCFLAGS)
-IFCHANGE      = $(srcdir)/tool/ifchange
-SET_LC_MESSAGES = env LC_MESSAGES=C
-OBJDUMP       = @OBJDUMP@
-OBJCOPY       = @OBJCOPY@
-VCS           = @VCS@
-VCSUP         = @VCSUP@
-DTRACE        = @DTRACE@
-DTRACE_EXT    = @DTRACE_EXT@
-DTRACE_OBJ    = @DTRACE_OBJ@
-DTRACE_REBUILD= @DTRACE_REBUILD@
-DTRACE_GLOMMED_OBJ = $(DTRACE_REBUILD:yes=ruby-glommed.$(OBJEXT))
-
-OBJEXT        = @OBJEXT@
-ASMEXT        = S
-DLEXT         = @DLEXT@
-MANTYPE	      = @MANTYPE@
-SYMBOL_PREFIX = @SYMBOL_PREFIX@
-
-INSTALLED_LIST= .installed.list
-
-NEWLINE_C     = enc/trans/newline.c
-MINIPRELUDE_C = miniprelude.c
-PRELUDE_C     = prelude.c
-RBCONFIG      = .rbconfig.time
-
-SRC_FILE      = $<
-OS_SRC_FILE   = $<
-DEST_FILE     = $@
-OS_DEST_FILE  = $@
-
-MESSAGE_BEGIN = @for line in
-MESSAGE_END = ; do echo "$$line"; done
-ECHO_BEGIN = @sep=''; for word in
-ECHO_END = ; do echo @ECHO_N@ "$$sep'$$word'@ECHO_C@"; sep=' '; done; echo
-
-DESTDIR       = @DESTDIR@
-
-configure_args = @configure_args@
-#### End of variables
-
-.SUFFIXES: .inc .h .c .y .i .$(DTRACE_EXT)
-
-all:
-
-# Prevent GNU make v3 from overflowing arg limit on SysV.
-.NOEXPORT:
-
-miniruby$(EXEEXT):
-		@-if test -f $@; then $(MV) -f $@ $@.old; $(RM) $@.old; fi
-		$(ECHO) linking $@
-		$(Q) $(PURIFY) $(CC) $(LDFLAGS) $(XLDFLAGS) $(NORMALMAINOBJ) $(MINIOBJS) $(COMMONOBJS) $(MAINLIBS) $(LIBS) $(OUTFLAG)$@
-
-$(PROGRAM):
-		@$(RM) $@
-		$(ECHO) linking $@
-		$(Q) $(PURIFY) $(CC) $(LDFLAGS) $(XLDFLAGS) $(MAINOBJ) $(EXTOBJS) $(LIBRUBYARG) $(MAINLIBS) $(LIBS) $(EXTLIBS) $(OUTFLAG)$@
-		$(Q) $(POSTLINK)
-
-# We must `rm' the library each time this rule is invoked because "updating" a
-# MAB library on Apple/NeXT (see --enable-fat-binary in configure) is not
-# supported.
-$(LIBRUBY_A):
-		@$(RM) $@
-		$(ECHO) linking static-library $@
-		$(Q) $(AR) $(ARFLAGS) $@ $(LIBRUBY_A_OBJS) $(INITOBJS)
-		@-$(RANLIB) $@ 2> /dev/null || true
-		$(ECHO) verifying static-library $@
-		@$(PURIFY) $(CC) $(LDFLAGS) $(XLDFLAGS) $(MAINOBJ) $(LIBRUBY_A) $(MAINLIBS) $(EXTLIBS) $(LIBS) $(OUTFLAG)conftest$(EXEEXT)
-		@$(RM) conftest$(EXEEXT) conftest.c
-
-$(LIBRUBY_SO):
-		@-$(PRE_LIBRUBY_UPDATE)
-		$(ECHO) linking shared-library $@
-		$(Q) $(LDSHARED) $(DLDFLAGS) $(OBJS) $(DLDOBJS) $(SOLIBS) $(EXTSOLIBS) $(OUTFLAG)$@
-		-$(Q) $(OBJCOPY) -w -L '$(SYMBOL_PREFIX)Init_*' -L '$(SYMBOL_PREFIX)ruby_static_id_*' \
-			-L '$(SYMBOL_PREFIX)*_threadptr_*' $@
-		$(Q) $(POSTLINK)
-		@-$(MINIRUBY) -e 'ARGV.each{|link| File.delete link rescue nil; \
-						  File.symlink "$(LIBRUBY_SO)", link}' \
-				$(LIBRUBY_ALIASES) || true
-
-ruby_pc = @ruby_pc@
-$(ruby_pc):
-		@./config.status --file=$@:$(srcdir)/template/ruby.pc.in
-
-$(RBCONFIG): $($(CROSS_COMPILING:no=)PREP)
-
-rbconfig.rb: $(RBCONFIG)
-
-install-cross: $(arch)-fake.rb $(RBCONFIG) rbconfig.rb $(arch_hdrdir)/ruby/config.h \
-	$(LIBRUBY_A) $(LIBRUBY_SO) $(ARCHFILE)
-	$(ECHO) installing cross-compiling stuff
-	$(Q) $(MAKEDIRS) $(XRUBY_RUBYLIBDIR)/$(arch) $(XRUBY_RUBYHDRDIR)/$(arch)/ruby
-	$(Q) sed '/^\$$:\.unshift/q' $(arch)-fake.rb > fake.rb
-	$(Q) $(BASERUBY) -p \
-	-e '~/^\s*CONFIG\["LDFLAGS"\]/ and' \
-	-e '$$_[/(?=\s*"$$)/] = %q[ #{(CONFIG["LIBPATHFLAG"]%File.dirname(__FILE__)).strip}]' \
-	rbconfig.rb > fake-rbconfig.rb
-	$(INSTALL_SCRIPT) fake.rb $(XRUBY_RUBYLIBDIR)/$(arch)/fake.rb
-	$(INSTALL_SCRIPT) fake-rbconfig.rb $(XRUBY_RUBYLIBDIR)/$(arch)/rbconfig.rb
-	@$(RM) fake.rb fake-rbconfig.rb
-	$(INSTALL_DATA) $(arch_hdrdir)/ruby/config.h $(XRUBY_RUBYHDRDIR)/$(arch)/ruby
-	$(INSTALL_DATA) $(top_srcdir)/include/ruby/win32.h $(XRUBY_RUBYHDRDIR)/ruby
-	$(INSTALL_DATA) $(LIBRUBY) $(LIBRUBY_A) $(XRUBY_RUBYLIBDIR)/$(arch)
-	$(INSTALL_PROGRAM) $(LIBRUBY_SO) $(XRUBY_RUBYLIBDIR)/$(arch)
-
-Makefile:	$(srcdir)/Makefile.in $(srcdir)/enc/Makefile.in
-
-$(MKFILES): config.status $(srcdir)/version.h
-		@[ -f $@ ] && mv $@ $@.old
-		MAKE=$(MAKE) $(SHELL) ./config.status $@
-		@cmp $@ $@.old > /dev/null 2>&1 && echo $@ unchanged && exit 0; \
-		{ \
-		    echo "all:; -@rm -f conftest.mk"; \
-		    echo "conftest.mk: .force; @echo AUTO_REMAKE"; \
-		    echo ".force:"; \
-		} > conftest.mk || exit 1; \
-		$(MAKE) -f conftest.mk | grep '^AUTO_REMAKE$$' >/dev/null 2>&1 || \
-		{ echo "$@ updated, restart."; exit 1; }
-
-uncommon.mk: $(srcdir)/common.mk
-		sed 's/{\$$([^(){}]*)[^{}]*}//g' $< > $@
-
-.PHONY: reconfig
-reconfig-args = $(srcdir)/$(CONFIGURE) $(configure_args)
-config.status-args = ./config.status --recheck
-reconfig-exec-0 = exec 3>&1; exit `exec 4>&1; { "$$@" 3>&- 4>&-; echo $$? 1>&4; } | fgrep -v '(cached)' 1>&3 3>&- 4>&-`
-reconfig-exec-1 = set -x; "$$@"
-
-reconfig config.status:	$(srcdir)/$(CONFIGURE) $(srcdir)/enc/Makefile.in \
-			$(srcdir)/include/ruby/version.h
-	@PWD= MINIRUBY="$(MINIRUBY)"; export MINIRUBY; \
-	set $(SHELL) $($@-args); $(reconfig-exec-$(V))
-
-$(srcdir)/$(CONFIGURE): $(srcdir)/configure.in
-	$(CHDIR) $(srcdir) && exec $(AUTOCONF) -o $(@F)
-
-incs: id.h
-all-incs: probes.h
-
-# Things which should be considered:
-# * with gperf v.s. without gperf
-# * committers may have various versions of gperf
-# * ./configure v.s. ../ruby/configure
-# * GNU make v.s. HP-UX make	# HP-UX make invokes the action if lex.c and keywords has same mtime.
-# * svn checkout generate a file with mtime as current time
-# * ext4 and XFS has a mtime with fractional part
-lex.c: defs/keywords
-	@\
-	if cmp -s $(srcdir)/defs/lex.c.src $?; then \
-	  [ $(Q) ] && echo copying $@ || set -x; \
-	  $(CP) $(srcdir)/lex.c.blt $@; \
-	else \
-	  [ $(Q) ] && echo generating $@ || set -x; \
-	  gperf -C -p -j1 -i 1 -g -o -t -N rb_reserved_word -k1,3,$$ $? > $@.tmp && \
-	  $(MV) $@.tmp $@ && \
-	  $(CP) $? $(srcdir)/defs/lex.c.src && \
-	  $(CP) $@ $(srcdir)/lex.c.blt; \
-	fi
-
-NAME2CTYPE_OPTIONS = -7 -c -j1 -i1 -t -C -P -T -H uniname2ctype_hash -Q uniname2ctype_pool -N uniname2ctype_p
-
-enc/unicode/name2ctype.h: enc/unicode/name2ctype.kwd
-	$(MAKEDIRS) $(@D)
-	@set +e; \
-	if cmp -s $(?:.kwd=.src) $?; then \
-	  set -x; \
-	  $(CP) $(?:.kwd=.h.blt) $@; \
-	else \
-	  trap '$(RM) $@-1.h $@-2.h' 0 && \
-	  set -x; \
-	  sed '/^#ifdef USE_UNICODE_PROPERTIES/,/^#endif/d' $? | gperf $(NAME2CTYPE_OPTIONS) > $@-1.h && \
-	  sed '/^#ifdef USE_UNICODE_PROPERTIES/d;/^#endif/d' $? | gperf $(NAME2CTYPE_OPTIONS) > $@-2.h && \
-	  diff -DUSE_UNICODE_PROPERTIES $@-1.h $@-2.h > $@.tmp || :; \
-	  $(MV) $@.tmp $@ && \
-	  $(CP) $? $(?:.kwd=.src) && \
-	  $(CP) $@ $(?:.kwd=.h.blt); \
-	fi
-
-JIS_PROPS_OPTIONS = -k1,3 -7 -c -j1 -i1 -t -C -P -t --ignore-case -H onig_jis_property_hash -Q onig_jis_property_pool -N onig_jis_property
-
-enc/jis/props.h: enc/jis/props.kwd
-	$(MAKEDIRS) $(@D)
-	@set +e; \
-	if cmp -s $(?:.kwd=.src) $?; then \
-	  set -x; \
-	  $(CP) $(?:.kwd=.h.blt) $@; \
-	else \
-	  set -x; \
-	  gperf $(JIS_PROPS_OPTIONS) $? | \
-	  sed 's/(int)(long)&((\([a-zA-Z_0-9 ]*[a-zA-Z_0-9]\) *\*)0)->\([a-zA-Z0-9_]*\),/(char)offsetof(\1, \2),/g' > $@ && \
-	  $(CP) $? $(?:.kwd=.src) && \
-	  $(CP) $@ $(?:.kwd=.h.blt); \
-	fi
-
-.c.@OBJEXT@:
-	@$(ECHO) compiling $<
-	$(Q) $(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -c $<
-
-.s.@OBJEXT@:
-	@$(ECHO) assembling $<
-	$(Q) $(AS) $(ASFLAGS) -o $@ $<
-
-.c.S:
-	@$(ECHO) translating $<
-	$(Q) $(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -S $<
-
-.c.i:
-	@$(ECHO) preprocessing $<
-	$(Q) $(CPP) $(warnflags) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -E $< > $@
-
-.d.h:
-	@$(ECHO) translating probes $<
-	$(Q) $(DTRACE) -o $@.tmp -h -C $(INCFLAGS) -s $<
-	$(Q) sed -e 's/RUBY_/RUBY_DTRACE_/g' -e 's/PROBES_H_TMP/PROBES_H/g' -e 's/(char \*/(const char */g' -e 's/, char \*/, const char */g' $@.tmp > $@
-	$(Q) $(RM) $@.tmp
-
-.dmyh.h:
-	@$(ECHO) copying dummy $(DEST_FILE)
-	$(Q) $(CP) $(OS_SRC_FILE) $(OS_DEST_FILE)
-
-probes.stamp: $(DTRACE_REBUILD_OBJS)
-	$(Q) if test -f $@ -o -f probes.$(OBJEXT); then \
-	  $(RM) $(DTRACE_REBUILD_OBJS) $@; \
-	  $(ECHO0) "rebuilding objects which were modified by \"dtrace -G\""; \
-	  $(MAKE) $(DTRACE_REBUILD_OBJS); \
-	fi
-	$(Q) touch $@
-
-probes.@OBJEXT@: $(srcdir)/probes.d $(DTRACE_REBUILD:yes=probes.stamp)
-	@$(ECHO) processing probes in object files
-	$(Q) $(RM) $@
-	$(Q) $(DTRACE) -G -C $(INCFLAGS) -s $(srcdir)/probes.d -o $@ $(DTRACE_REBUILD_OBJS)
-
-# DTrace static library hacks described here:
-# http://mail.opensolaris.org/pipermail/dtrace-discuss/2005-August/000207.html
-ruby-glommed.$(OBJEXT):
-	@$(ECHO) generating a glommed object with DTrace probes for static library
-	$(Q) $(LD) -r -o $@ $(OBJS)
-
-clean-local::
-	$(Q)$(RM) ext/extinit.c ext/extinit.$(OBJEXT) ext/ripper/y.output \
-		enc/encinit.c enc/encinit.$(OBJEXT)
-	-$(Q)$(RM) $(pkgconfig_DATA)
-
-distclean-local::
-	$(Q)$(RM) ext/config.cache $(RBCONFIG) Doxyfile
-	-$(Q)$(RM) run.gdb
-	-$(Q)$(RM) $(INSTALLED_LIST) $(arch_hdrdir)/ruby/config.h verconf.h
-	-$(Q)$(RMDIRS) $(arch_hdrdir)/ruby 2> /dev/null || true
-
-clean-ext distclean-ext realclean-ext::
-	@cd ext 2>/dev/null || exit 0; set dummy `echo "${EXTS}" | tr , ' '`; shift; \
-	test "$$#" = 0 && set .; \
-	set dummy `\
-	    find "$$@" -name Makefile -print | sed 's:^\./::;s:/Makefile$$::' | sort; \
-	`; shift; \
-	cd ..; \
-	for dir do \
-	    echo $(@:-ext=)ing "$$dir"; \
-	    (cd "ext/$$dir" && exec $(MAKE) $(MFLAGS) $(@:-ext=)) && \
-	    case "$@" in \
-	    *distclean-ext*|*realclean-ext*) \
-		$(RMDIRS) "ext/$$dir" 2> /dev/null || true;; \
-	    esac; \
-	done
-	-$(Q)$(RM) ext/extinit.$(OBJEXT)
-
-distclean-ext realclean-ext::
-	-$(Q)$(RM) ext/extinit.c
-	-$(Q)$(RMDIR) ext 2> /dev/null || true
-
-clean-extout:
-
-clean-enc distclean-enc realclean-enc:
-	@test -f "$(ENC_MK)" || exit 0; \
-	echo $(@:-enc=ing) encodings; \
-	exec $(MAKE) -f $(ENC_MK) $(MFLAGS) $(@:-enc=)
-
-ext/extinit.$(OBJEXT): ext/extinit.c $(SETUP)
-	$(ECHO) compiling $@
-	$(Q) $(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -c ext/extinit.c
-
-enc/encinit.$(OBJEXT): enc/encinit.c $(SETUP)
-
-up::
-	@$(CHDIR) "$(srcdir)" && LC_TIME=C exec $(VCSUP)
-
-after-update:: update-config_files common-srcs
-
-update-mspec:
-	@$(CHDIR) $(srcdir); \
-	if [ -d spec/mspec ]; then \
-	  cd spec/mspec; \
-	  echo updating mspec ...; \
-	  exec git pull; \
-	else \
-	  echo retrieving mspec ...; \
-	  exec git clone $(MSPEC_GIT_URL) spec/mspec; \
-	fi
-
-update-rubyspec: update-mspec
-	@$(CHDIR) $(srcdir); \
-	if [ -d spec/rubyspec ]; then \
-	  cd spec/rubyspec; \
-	  echo updating rubyspec ...; \
-	  exec git pull; \
-	else \
-	  echo retrieving rubyspec ...; \
-	  exec git clone $(RUBYSPEC_GIT_URL) spec/rubyspec; \
-	fi
-
-test-rubyspec-precheck:
-	@if [ ! -d $(srcdir)/spec/rubyspec ]; then echo No rubyspec here.  make update-rubyspec first.; exit 1; fi
-
-update-coverage:
-	@$(CHDIR) $(srcdir); \
-	if [ -d coverage/simplecov ]; then \
-	  cd coverage/simplecov; \
-	  echo updating simplecov ...; \
-	  exec git pull; \
-	else \
-	  echo retrieving simplecov ...; \
-	  exec git clone $(SIMPLECOV_GIT_URL) coverage/simplecov; \
-	fi
-
-INSNS	= opt_sc.inc optinsn.inc optunifs.inc insns.inc insns_info.inc \
-	  vmtc.inc vm.inc
-
-$(INSNS): $(srcdir)/insns.def vm_opts.h \
-	  $(srcdir)/defs/opt_operand.def $(srcdir)/defs/opt_insn_unif.def \
-	  $(srcdir)/tool/instruction.rb $(srcdir)/tool/insns2vm.rb
-	$(ECHO) generating $@
-	$(Q) $(BASERUBY) -Ku $(srcdir)/tool/insns2vm.rb $(INSNS2VMOPT) $@
-
-verconf.h: $(RBCONFIG)
-
-loadpath: verconf.h
-	@$(CPP) $(XCFLAGS) $(CPPFLAGS) $(srcdir)/loadpath.c | \
-	sed -e '1,/^const char ruby_initial_load_paths/d;/;/,$$d' \
-	    -e '/^ /!d;s/ *"\\0"$$//;s/" *"//g'
diff --git a/NEWS b/NEWS
deleted file mode 100644
index b1e80ec764..0000000000
--- a/NEWS
+++ /dev/null
@@ -1,152 +0,0 @@
-# -*- rdoc -*-
-
-= NEWS for Ruby 2.3.0
-
-This document is a list of user visible feature changes made between
-releases except for bug fixes.
-
-Note that each entry is kept so brief that no reason behind or
-reference information is supplied with.  For a full list of changes
-with all sufficient information, see the ChangeLog file.
-
-== Changes since the 2.2.0 release
-
-=== Language changes
-
-=== Core classes updates (outstanding ones only)
-
-* Array
-
-  * Array#bsearch_index [Feature #10730]
-
-* Enumerable
-
-  * Enumerable#grep_v is added as inverse version of Enumerable#grep.
-    [Feature #11049]
-  * Enumerable#chunk_while [Feature #10769]
-
-* Hash
-
-  * Hash#fetch_values [Feature #10017]
-
-* Numeric
-
-  * Numeric#positive? and Numeric#negative? are added, which return
-    true when the receiver is positive and negative respectively.
-    [Feature #11151]
-
-* IO
-
-  * new mode flag File::SHARE_DELETE is available.
-    this flag means to permit deleting opened file on Windows, but currently
-    this affect only files opened as binary.  [Feature #11218]
-
-* Thread
-  * Thread#name, Thread#name= are added to handle thread names [Feature #11251]
-
-* NameError
-  * NameError#receiver is added to take the receiver object. [Feature #10881]
-
-=== Core classes compatibility issues (excluding feature bug fixes)
-
-* Array
-  * Array#select!, Array#keep_if, Array#reject!, and Array#delete_if
-    no longer changes the receiver array instantly every time the
-    block is called.  [Feature #10714]
-
-  * Array#flatten and Array#flatten! no longer try to call #to_ary
-    method on elements beyond the given level.  [Bug #10748]
-
-* Enumerable
-  * Enumerable#chunk and Enumerable#slice_before no longer takes the
-    initial_state argument.  [Feature #10958]
-    Use a local variable instead to maintain a state.
-
-* File::Stat
-  * On Windows File::Stat#ino always returned 0, but now returns
-    BY_HANDLE_FILE_INFORMATION.nFileIndexHigh/Low.
-
-* IO
-  * IO#close doesn't raise when the IO object is closed.  [Feature #10718]
-
-* Module
-  * Module#define_method and Object.define_singleton_method now
-    require method body, Proc, Method, or a block, and raise
-    ArgumentError if no block is given directly.  [Bug #11283]
-
-* pack/unpack (Array/String)
-  * j and J directives for pointer width integer type.  [Feature #11215]
-
-
-=== Stdlib updates (outstanding ones only)
-
-* Socket
-  * Socket#connect_nonblock, Socket#accept_nonblock,
-    TCPServer#accept_nonblock, UNIXServer#accept_nonblock,
-    BasicSocket#recv_nonblock, BasicSocket#recvmsg_nonblock,
-    BasicSocket#sendmsg_nonblock all support `exception :false` to return
-    :wait_readable or :wait_writable symbols instead of raising
-    IO::WaitReadable or IO::WaitWritable exceptions
-  * BasicSocket#recv and BasicSocket#recv_nonblock allow an output
-    String buffer argument like IO#read and IO#read_nonblock to reduce
-    GC overhead
-
-* ObjectSpace (objspace)
-  * ObjectSpace.count_imemo_objects is added.
-  * ObjectSpace.internal_class_of is added.
-  * ObjectSpace.internal_super_of is added.
-
-* OpenSSL
-  * OpenSSL::SSL::SSLSocket#accept_nonblock and
-    OpenSSL::SSL::SSLSocket#connect_nonblock supports `exception: false`.
-
-* Pathname
-  * Pathname#descend and Pathname#ascend supported blockless form.
-    [Feature #11052]
-
-* io/wait
-  * IO#wait_readable no longer checks FIONREAD, it may be used for
-    non-bytestream IO such as listen sockets.
-
-=== Stdlib compatibility issues (excluding feature bug fixes)
-
-* lib/webrick/utils.rb
- * removed unused argument. https://github.com/ruby/ruby/pull/356
-
-* lib/drb/drb.rb
- * removed unused argument. https://github.com/ruby/ruby/pull/515
-
-* lib/base64.rb
- * Base64.urlsafe_encode64: added a "padding" option to suppress
-   the padding character ("=").
- * Base64.urlsafe_decode64: now it accepts not only correctly-padded
-   input but also unpadded input.
-
-* lib/matrix.rb
- * Add Vector#round. https://github.com/ruby/ruby/pull/802
-
-* ext/coverage/coverage.c
-  * Coverage.peek_result: new method to allow coverage to be captured without
-    stopping the coverage tool.
-
-* Net::Telnet
-  * Net::Telnet is extracted to net-telnet gem. It's unmaintain code.
-
-* Rake
-  * Rake is removed from stdlib.
-
-=== Built-in global variables compatibility issues
-
-* $SAFE
-  * $SAFE=2 and $SAFE=3 are obsolete.  If $SAFE is set to 2 or larger,
-    an ArgumentError is raised.  [Feature #5455]
-
-=== C API updates
-
-* rb_define_class_id_under() now raises a TypeError exception when the
-  class is already defined but its superclass does not match the given
-  superclass, as well as definitions in ruby level.
-
-=== Build system updates
-
-=== Implementation changes
diff --git a/NEWS.md b/NEWS.md
new file mode 100644
index 0000000000..501b894c67
--- /dev/null
+++ b/NEWS.md
@@ -0,0 +1,268 @@
+# NEWS for Ruby 4.1.0
+
+This document is a list of user-visible feature changes
+since the **4.0.0** release, except for bug fixes.
+
+Note that each entry is kept to a minimum, see links for details.
+
+## Language changes
+
+* `Module#clone` and `Module#dup` no longer rewrite the lexical scope of
+  copied methods. Constants and class variables resolve through the
+  original class, consistent with inheritance and mixins.
+  [[Feature #21981]]
+
+## Core classes updates
+
+Note: We're only listing outstanding class updates.
+
+* Array
+
+    * `Array#pack` accepts a new format `R` and `r` for unpacking unsigned
+      and signed LEB128 encoded integers. [[Feature #21785]]
+    * `Array#pack` accepts a new format `^` that returns the current offset.
+      Useful when combined with variable width formats like LEB128. [[Feature #21796]]
+
+* ENV
+
+    * `ENV.fetch_values` is added. It returns an array of values for the
+      given names, raising `KeyError` for missing names unless a block is
+      given. [[Feature #21781]]
+
+* Kernel
+
+    * `Kernel#autoload_relative` and `Module#autoload_relative` are added.
+      These methods work like `autoload`, but resolve the file path relative
+      to the file where the method is called, similar to `require_relative`.
+      This makes it easier to autoload constants from files in the same
+      directory without hardcoding absolute paths or manipulating `$LOAD_PATH`.
+      [[Feature #15330]]
+
+* MatchData
+
+    * `MatchData#integer_at` is added.  It converts the matched substring to
+      integer and return the result.  [[Feature #21932]]
+
+* Regexp
+
+    * All instances of `Regexp` are now frozen, not just literals.
+      Subclasses of `Regexp` are not frozen for compatibility.
+      [[Feature #8948]]
+
+* Set
+
+    * A deprecated behavior, `Set#to_set`, `Range#to_set`, and
+      `Enumerable#to_set` accepting arguments, was removed.  [[Feature #21390]]
+
+## Stdlib updates
+
+### The following bundled gems are added.
+
+
+We only list stdlib changes that are notable feature changes.
+
+Other changes are listed in the following sections. We also listed release
+history from the previous bundled version that is Ruby 3.4.0 if it has GitHub
+releases.
+
+### The following bundled gems are promoted from default gems.
+
+* tsort 0.2.0
+* win32-registry 0.1.2
+
+### The following default gem is added.
+
+### The following default gems are updated.
+
+* RubyGems 4.1.0.dev
+  * 4.0.3 to [v4.0.4][RubyGems-v4.0.4], [v4.0.5][RubyGems-v4.0.5], [v4.0.6][RubyGems-v4.0.6], [v4.0.7][RubyGems-v4.0.7], [v4.0.8][RubyGems-v4.0.8], [v4.0.9][RubyGems-v4.0.9], [v4.0.10][RubyGems-v4.0.10], [v4.0.11][RubyGems-v4.0.11], [v4.0.12][RubyGems-v4.0.12], [v4.0.13][RubyGems-v4.0.13]
+* bundler 4.1.0.dev
+  * 4.0.3 to [v4.0.4][bundler-v4.0.4], [v4.0.5][bundler-v4.0.5], [v4.0.6][bundler-v4.0.6], [v4.0.7][bundler-v4.0.7], [v4.0.8][bundler-v4.0.8], [v4.0.9][bundler-v4.0.9], [v4.0.10][bundler-v4.0.10], [v4.0.11][bundler-v4.0.11], [v4.0.12][bundler-v4.0.12], [v4.0.13][bundler-v4.0.13]
+* erb 6.0.4
+  * 6.0.1 to [v6.0.1.1][erb-v6.0.1.1], [v6.0.2][erb-v6.0.2], [v6.0.3][erb-v6.0.3], [v6.0.4][erb-v6.0.4]
+* ipaddr 1.2.9
+  * 1.2.8 to [v1.2.9][ipaddr-v1.2.9]
+* json 2.19.8
+  * 2.18.0 to [v2.18.1][json-v2.18.1], [v2.19.0][json-v2.19.0], [v2.19.1][json-v2.19.1], [v2.19.2][json-v2.19.2], [v2.19.3][json-v2.19.3], [v2.19.4][json-v2.19.4], [v2.19.5][json-v2.19.5], [v2.19.6][json-v2.19.6], [v2.19.7][json-v2.19.7]
+* openssl 4.0.2
+  * 4.0.0 to [v4.0.1][openssl-v4.0.1], [v4.0.2][openssl-v4.0.2]
+* prism 1.9.0
+  * 1.7.0 to [v1.8.0][prism-v1.8.0], [v1.8.1][prism-v1.8.1], [v1.9.0][prism-v1.9.0]
+* psych 5.4.0
+* resolv 0.7.1
+  * 0.7.0 to [v0.7.1][resolv-v0.7.1]
+* stringio 3.2.1.dev
+* strscan 3.1.9.dev
+  * 3.1.6 to [v3.1.7][strscan-v3.1.7], [v3.1.8][strscan-v3.1.8]
+* syntax_suggest 3.0.0
+* timeout 0.6.1
+  * 0.6.0 to [v0.6.1][timeout-v0.6.1]
+* zlib 3.2.3
+  * 3.2.2 to [v3.2.3][zlib-v3.2.3]
+
+### The following bundled gems are updated.
+
+* minitest 6.0.6
+* rake 13.4.2
+  * 13.3.1 to [v13.4.0][rake-v13.4.0], [v13.4.1][rake-v13.4.1], [v13.4.2][rake-v13.4.2]
+* test-unit 3.7.7
+  * 3.7.5 to [3.7.6][test-unit-3.7.6], [3.7.7][test-unit-3.7.7]
+* net-imap 0.6.4
+  * 0.6.2 to [v0.6.3][net-imap-v0.6.3], [v0.6.4][net-imap-v0.6.4]
+* rbs 4.0.2
+  * 3.10.0 to [v3.10.1][rbs-v3.10.1], [v3.10.2][rbs-v3.10.2], [v3.10.3][rbs-v3.10.3], [v3.10.4][rbs-v3.10.4], [v4.0.0.dev.5][rbs-v4.0.0.dev.5], [v4.0.0][rbs-v4.0.0], [v4.0.2][rbs-v4.0.2]
+* typeprof 0.32.0
+* mutex_m 0.3.0
+* bigdecimal 4.1.2
+  * 4.0.1 to [v4.1.0][bigdecimal-v4.1.0], [v4.1.1][bigdecimal-v4.1.1], [v4.1.2][bigdecimal-v4.1.2]
+* resolv-replace 0.2.0
+  * 0.1.1 to [v0.2.0][resolv-replace-v0.2.0]
+* syslog 0.4.0
+  * 0.3.0 to [v0.4.0][syslog-v0.4.0]
+* repl_type_completor 0.1.15
+  * 0.1.12 to [v0.1.13][repl_type_completor-v0.1.13], [v0.1.14][repl_type_completor-v0.1.14], [v0.1.15][repl_type_completor-v0.1.15]
+* pstore 0.2.1
+  * 0.2.0 to [v0.2.1][pstore-v0.2.1]
+* rdoc 7.2.0
+  * 7.0.3 to [v7.0.4][rdoc-v7.0.4], [v7.1.0][rdoc-v7.1.0], [v7.2.0][rdoc-v7.2.0]
+* win32ole 1.9.3
+  * 1.9.2 to [v1.9.3][win32ole-v1.9.3]
+* irb 1.18.0
+  * 1.16.0 to [v1.17.0][irb-v1.17.0], [v1.18.0][irb-v1.18.0]
+
+### RubyGems and Bundler
+
+Ruby 4.0 bundled RubyGems and Bundler version 4. see the following links for details.
+
+## Supported platforms
+
+## Compatibility issues
+
+## Stdlib compatibility issues
+
+## C API updates
+
+### Embedded TypedData
+
+* The `RUBY_TYPED_EMBEDDABLE` flag is now public and documented and can be used by C extensions.
+  It allows allocating C structs directly into Ruby object slots, which reduces pointer chasing,
+  and in some case memory usage.
+  See the C extension documentation for details. [[Feature #21853]]
+
+* Added new C23 inspired allocator functions, that takes the previous memory size.
+  This allow the Ruby GC to better keep track of memory usage, improving its heuristics.
+  It also improves the performance of system allocators that support C23 `free_sized`.
+
+  However, it is important to note that passing an incorrect size to these function is undefined
+  behavior and may result in crashes or memory leaks.
+
+  - `ruby_xfree_sized(void *ptr, size_t size)`
+  - `ruby_xrealloc_sized(void *ptr, size_t newsiz, size_t oldsiz)`
+  - `ruby_xrealloc2_sized(void *ptr, size_t newelems, size_t newsiz, size_t oldelems)`
+
+  [[Feature #21861]]
+
+### Removed APIs
+
+The following APIs, which have been deprecated for many years, are removed.
+[[Feature #21768]]
+
+* old postponed job functions,
+* untyped data object type/functions,
+* old APIs to allocate a data object,
+* taintedness/trustedness enums/macros,
+* `rb_gc_force_recycle` function,
+* `rb_iterate` function,
+* and some functions and constants for internal use.
+
+## Implementation improvements
+
+### Ractor
+
+A lot of work has gone into making Ractors more stable, performant, and usable. These improvements bring Ractor implementation closer to leaving experimental status.
+
+## JIT
+
+[Feature #8948]: https://bugs.ruby-lang.org/issues/8948
+[Feature #15330]: https://bugs.ruby-lang.org/issues/15330
+[Feature #21390]: https://bugs.ruby-lang.org/issues/21390
+[Feature #21768]: https://bugs.ruby-lang.org/issues/21768
+[Feature #21785]: https://bugs.ruby-lang.org/issues/21785
+[Feature #21796]: https://bugs.ruby-lang.org/issues/21796
+[Feature #21853]: https://bugs.ruby-lang.org/issues/21853
+[Feature #21861]: https://bugs.ruby-lang.org/issues/21861
+[Feature #21932]: https://bugs.ruby-lang.org/issues/21932
+[Feature #21981]: https://bugs.ruby-lang.org/issues/21981
+[RubyGems-v4.0.4]: https://github.com/rubygems/rubygems/releases/tag/v4.0.4
+[RubyGems-v4.0.5]: https://github.com/rubygems/rubygems/releases/tag/v4.0.5
+[RubyGems-v4.0.6]: https://github.com/rubygems/rubygems/releases/tag/v4.0.6
+[RubyGems-v4.0.7]: https://github.com/rubygems/rubygems/releases/tag/v4.0.7
+[RubyGems-v4.0.8]: https://github.com/rubygems/rubygems/releases/tag/v4.0.8
+[RubyGems-v4.0.9]: https://github.com/rubygems/rubygems/releases/tag/v4.0.9
+[RubyGems-v4.0.10]: https://github.com/rubygems/rubygems/releases/tag/v4.0.10
+[RubyGems-v4.0.11]: https://github.com/rubygems/rubygems/releases/tag/v4.0.11
+[RubyGems-v4.0.12]: https://github.com/rubygems/rubygems/releases/tag/v4.0.12
+[RubyGems-v4.0.13]: https://github.com/rubygems/rubygems/releases/tag/v4.0.13
+[bundler-v4.0.4]: https://github.com/rubygems/rubygems/releases/tag/bundler-v4.0.4
+[bundler-v4.0.5]: https://github.com/rubygems/rubygems/releases/tag/bundler-v4.0.5
+[bundler-v4.0.6]: https://github.com/rubygems/rubygems/releases/tag/bundler-v4.0.6
+[bundler-v4.0.7]: https://github.com/rubygems/rubygems/releases/tag/bundler-v4.0.7
+[bundler-v4.0.8]: https://github.com/rubygems/rubygems/releases/tag/bundler-v4.0.8
+[bundler-v4.0.9]: https://github.com/rubygems/rubygems/releases/tag/bundler-v4.0.9
+[bundler-v4.0.10]: https://github.com/rubygems/rubygems/releases/tag/bundler-v4.0.10
+[bundler-v4.0.11]: https://github.com/rubygems/rubygems/releases/tag/bundler-v4.0.11
+[bundler-v4.0.12]: https://github.com/rubygems/rubygems/releases/tag/bundler-v4.0.12
+[bundler-v4.0.13]: https://github.com/rubygems/rubygems/releases/tag/bundler-v4.0.13
+[erb-v6.0.1.1]: https://github.com/ruby/erb/releases/tag/v6.0.1.1
+[erb-v6.0.2]: https://github.com/ruby/erb/releases/tag/v6.0.2
+[erb-v6.0.3]: https://github.com/ruby/erb/releases/tag/v6.0.3
+[erb-v6.0.4]: https://github.com/ruby/erb/releases/tag/v6.0.4
+[ipaddr-v1.2.9]: https://github.com/ruby/ipaddr/releases/tag/v1.2.9
+[json-v2.18.1]: https://github.com/ruby/json/releases/tag/v2.18.1
+[json-v2.19.0]: https://github.com/ruby/json/releases/tag/v2.19.0
+[json-v2.19.1]: https://github.com/ruby/json/releases/tag/v2.19.1
+[json-v2.19.2]: https://github.com/ruby/json/releases/tag/v2.19.2
+[json-v2.19.3]: https://github.com/ruby/json/releases/tag/v2.19.3
+[json-v2.19.4]: https://github.com/ruby/json/releases/tag/v2.19.4
+[json-v2.19.5]: https://github.com/ruby/json/releases/tag/v2.19.5
+[json-v2.19.6]: https://github.com/ruby/json/releases/tag/v2.19.6
+[json-v2.19.7]: https://github.com/ruby/json/releases/tag/v2.19.7
+[openssl-v4.0.1]: https://github.com/ruby/openssl/releases/tag/v4.0.1
+[openssl-v4.0.2]: https://github.com/ruby/openssl/releases/tag/v4.0.2
+[prism-v1.8.0]: https://github.com/ruby/prism/releases/tag/v1.8.0
+[prism-v1.8.1]: https://github.com/ruby/prism/releases/tag/v1.8.1
+[prism-v1.9.0]: https://github.com/ruby/prism/releases/tag/v1.9.0
+[resolv-v0.7.1]: https://github.com/ruby/resolv/releases/tag/v0.7.1
+[strscan-v3.1.7]: https://github.com/ruby/strscan/releases/tag/v3.1.7
+[strscan-v3.1.8]: https://github.com/ruby/strscan/releases/tag/v3.1.8
+[timeout-v0.6.1]: https://github.com/ruby/timeout/releases/tag/v0.6.1
+[zlib-v3.2.3]: https://github.com/ruby/zlib/releases/tag/v3.2.3
+[rake-v13.4.0]: https://github.com/ruby/rake/releases/tag/v13.4.0
+[rake-v13.4.1]: https://github.com/ruby/rake/releases/tag/v13.4.1
+[rake-v13.4.2]: https://github.com/ruby/rake/releases/tag/v13.4.2
+[test-unit-3.7.6]: https://github.com/test-unit/test-unit/releases/tag/3.7.6
+[test-unit-3.7.7]: https://github.com/test-unit/test-unit/releases/tag/3.7.7
+[net-imap-v0.6.3]: https://github.com/ruby/net-imap/releases/tag/v0.6.3
+[net-imap-v0.6.4]: https://github.com/ruby/net-imap/releases/tag/v0.6.4
+[rbs-v3.10.1]: https://github.com/ruby/rbs/releases/tag/v3.10.1
+[rbs-v3.10.2]: https://github.com/ruby/rbs/releases/tag/v3.10.2
+[rbs-v3.10.3]: https://github.com/ruby/rbs/releases/tag/v3.10.3
+[rbs-v3.10.4]: https://github.com/ruby/rbs/releases/tag/v3.10.4
+[rbs-v4.0.0.dev.5]: https://github.com/ruby/rbs/releases/tag/v4.0.0.dev.5
+[rbs-v4.0.0]: https://github.com/ruby/rbs/releases/tag/v4.0.0
+[rbs-v4.0.2]: https://github.com/ruby/rbs/releases/tag/v4.0.2
+[bigdecimal-v4.1.0]: https://github.com/ruby/bigdecimal/releases/tag/v4.1.0
+[bigdecimal-v4.1.1]: https://github.com/ruby/bigdecimal/releases/tag/v4.1.1
+[bigdecimal-v4.1.2]: https://github.com/ruby/bigdecimal/releases/tag/v4.1.2
+[resolv-replace-v0.2.0]: https://github.com/ruby/resolv-replace/releases/tag/v0.2.0
+[syslog-v0.4.0]: https://github.com/ruby/syslog/releases/tag/v0.4.0
+[repl_type_completor-v0.1.13]: https://github.com/ruby/repl_type_completor/releases/tag/v0.1.13
+[repl_type_completor-v0.1.14]: https://github.com/ruby/repl_type_completor/releases/tag/v0.1.14
+[repl_type_completor-v0.1.15]: https://github.com/ruby/repl_type_completor/releases/tag/v0.1.15
+[pstore-v0.2.1]: https://github.com/ruby/pstore/releases/tag/v0.2.1
+[rdoc-v7.0.4]: https://github.com/ruby/rdoc/releases/tag/v7.0.4
+[rdoc-v7.1.0]: https://github.com/ruby/rdoc/releases/tag/v7.1.0
+[rdoc-v7.2.0]: https://github.com/ruby/rdoc/releases/tag/v7.2.0
+[win32ole-v1.9.3]: https://github.com/ruby/win32ole/releases/tag/v1.9.3
+[irb-v1.17.0]: https://github.com/ruby/irb/releases/tag/v1.17.0
+[irb-v1.18.0]: https://github.com/ruby/irb/releases/tag/v1.18.0
diff --git a/README.EXT b/README.EXT
deleted file mode 100644
index 48b8d964c4..0000000000
--- a/README.EXT
+++ /dev/null
@@ -1 +0,0 @@
-Moved to doc/extension.rdoc
diff --git a/README.EXT.ja b/README.EXT.ja
deleted file mode 100644
index f884ecbb0e..0000000000
--- a/README.EXT.ja
+++ /dev/null
@@ -1 +0,0 @@
-doc/extension.ja.rdocに移動しました
diff --git a/README.ja.md b/README.ja.md
index eee54a9171..9bbc3a83a5 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -1,3 +1,11 @@
+[![Actions Status: MinGW](https://github.com/ruby/ruby/workflows/MinGW/badge.svg)](https://github.com/ruby/ruby/actions?query=workflow%3A"MinGW")
+[![Actions Status: Ubuntu](https://github.com/ruby/ruby/workflows/Ubuntu/badge.svg)](https://github.com/ruby/ruby/actions?query=workflow%3A"Ubuntu")
+[![Actions Status: Windows](https://github.com/ruby/ruby/workflows/Windows/badge.svg)](https://github.com/ruby/ruby/actions?query=workflow%3A"Windows")
+[![AppVeyor status](https://ci.appveyor.com/api/projects/status/0sy8rrxut4o0k960/branch/master?svg=true)](https://ci.appveyor.com/project/ruby/ruby/branch/master)
+[![Travis Status](https://app.travis-ci.com/ruby/ruby.svg?branch=master)](https://app.travis-ci.com/ruby/ruby)
+
+[English](rdoc-ref:README.md)
+
 # Rubyとは
 
 Rubyはシンプルかつ強力なオブジェクト指向スクリプト言語です． Rubyは純粋なオブジェクト指向言語として設計されているので，
@@ -10,83 +18,79 @@ Rubyはテキスト処理関係の能力などに優れ，Perlと同じくらい
 
 *   シンプルな文法
 *   普通のオブジェクト指向機能(クラス，メソッドコールなど)
-*   特殊なオブジェクト指向機能(Mixin, 特異メソッドなど)
+*   特殊なオブジェクト指向機能(Mixin，特異メソッドなど)
 *   演算子オーバーロード
 *   例外処理機能
 *   イテレータとクロージャ
 *   ガーベージコレクタ
 *   ダイナミックローディング (アーキテクチャによる)
-*   移植性が高い．多くのUnix-like/POSIX互換プラットフォーム上で動くだけでなく，Windows， Mac OS
-    X，BeOSなどの上でも動く cf.
-    http://bugs.ruby-lang.org/projects/ruby-trunk/wiki/SupportedPlatformsJa
+*   移植性が高い．多くのUnix-like/POSIX互換プラットフォーム上で動くだけでなく，Windows， macOS，
+    Haikuなどの上でも動く cf.
+    https://docs.ruby-lang.org/en/master/maintainers_md.html#label-Platform+Maintainers
 
 
 ## 入手法
 
-### FTPで
-
-以下の場所においてあります．
+サードパーティーツールを使った方法を含むRubyのインストール方法の一覧は
 
-ftp://ftp.ruby-lang.org/pub/ruby/
+https://www.ruby-lang.org/ja/downloads/
 
-### Subversionで
+を参照してください．
 
-開発先端のソースコードは次のコマンドで取得できます．
+### Git
 
-    $ svn co http://svn.ruby-lang.org/repos/ruby/trunk/ ruby
+ミラーをGitHubに公開しています． 以下のコマンドでリポジトリを取得できます．
 
-他に開発中のブランチの一覧は次のコマンドで見られます．
+```console
+$ git clone https://github.com/ruby/ruby.git
+```
 
-    $ svn ls http://svn.ruby-lang.org/repos/ruby/branches/
+他のブランチの一覧は次のコマンドで見られます．
 
-### Gitで
+```console
+$ git ls-remote https://github.com/ruby/ruby.git
+```
 
-SubversionのミラーをGitHubに公開しています． 以下のコマンドでリポジトリを取得できます．
-
-    $ git clone git://github.com/ruby/ruby.git
+Rubyリポジトリの本来のmasterは https://git.ruby-lang.org/ruby.git にあります．
+コミッタはこちらを使います．
 
 ## ホームページ
 
 RubyのホームページのURLは
 
-http://www.ruby-lang.org/
+https://www.ruby-lang.org/
 
 です．
 
 ## メーリングリスト
 
-Rubyのメーリングリストがあります．参加希望の方は
-
-mailto:ruby-list-request@ruby-lang.org
+Rubyのメーリングリストがあります．参加希望の方は [ruby-list-request@ml.ruby-lang.org] まで件名に
 
-まで本文に
-
-    subscribe
+    join
 
 と書いて送って下さい．
 
-Ruby開発者向けメーリングリストもあります．こちらではrubyのバグ，将来の仕様拡張など実装上の問題について議論されています． 参加希望の方は
-
-mailto:ruby-dev-request@ruby-lang.org
-
-までruby-listと同様の方法でメールしてください．
+Ruby開発者向けメーリングリストもあります．こちらではrubyのバグ，将来の仕様拡張など実装上の問題について議論されています．
+参加希望の方は [ruby-dev-request@ml.ruby-lang.org] までruby-listと同様の方法でメールしてください．
 
 Ruby拡張モジュールについて話し合うruby-extメーリングリストと数学関係の話題について話し合うruby-mathメーリングリストと
 英語でrubyについて話し合うruby-talkメーリングリストもあります．参加方法はどれも同じです．
 
+[ruby-list-request@ml.ruby-lang.org]: mailto:ruby-list-request@ml.ruby-lang.org?subject=join
+[ruby-dev-request@ml.ruby-lang.org]: mailto:ruby-dev-request@ml.ruby-lang.org?subject=join
+
 ## コンパイル・インストール
 
 以下の手順で行ってください．
 
-1.  もし `configure` ファイルが見つからない，もしくは `configure.in` より古いようなら， `autoconf` を実行して
-    新しく `configure` を生成する
+1.  (Gitリポジトリから取得したソースをビルドする場合) `./autogen.sh` を実行して新しく `configure` を生成する
 
 2.  `configure` を実行して `Makefile` などを生成する
 
     環境によってはデフォルトのCコンパイラ用オプションが付きます． `configure` オプションで `optflags=..`
     `warnflags=..` 等で上書きできます．
 
-3.  (必要ならば)`defines.h` を編集する
+3.  (必要ならば)`include/ruby/defines.h` を編集する
 
     多分，必要無いと思います．
 
@@ -95,7 +99,8 @@ Ruby拡張モジュールについて話し合うruby-extメーリングリス�
     `ext/Setup` に記述したモジュールは静的にリンクされます．
 
     ダイナミックローディングをサポートしていないアーキテクチャでは `Setup` の1行目の「`option nodynamic`」という行のコ
-    メントを外す必要があります．また，このアーキテクチャで拡張モジュールを利用するためには，あらかじめ静的にリンクをしておく必要があります．
+    メントを外す必要があります．
+    また，このアーキテクチャで拡張モジュールを利用するためには，あらかじめ静的にリンクをしておく必要があります．
 
 5.  `make` を実行してコンパイルする
 
@@ -151,21 +156,21 @@ UNIXであれば `configure` がほとんどの差異を吸収してくれるは
 
 ## 配布条件
 
-`COPYING.ja` ファイルを参照してください．
+[COPYING.ja](https://docs.ruby-lang.org/en/master/COPYING_ja.html) ファイルを参照してください．
 
 ## フィードバック
 
-Rubyに関する質問は Ruby-Talk（英語）や Ruby-List（日本語） (https://www.ruby-lang.org/ja/community/mailing-lists) や，
-stackoverflow (http://ja.stackoverflow.com/) などのWebサイトに投稿してください．
+Rubyに関する質問は [Ruby-Talk]（英語）や [Ruby-List]（日本語）や，
+[stackoverflow] などのWebサイトに投稿してください．
 
-バグ報告は http://bugs.ruby-lang.org で受け付けています．
+バグ報告は https://bugs.ruby-lang.org で受け付けています．
 
+[Ruby-Talk]: https://www.ruby-lang.org/en/community/mailing-lists
+[Ruby-List]: https://www.ruby-lang.org/ja/community/mailing-lists
+[stackoverflow]: https://ja.stackoverflow.com/
 
 ## 著者
 
 Rubyのオリジナル版は，1995年にまつもとゆきひろ氏によって設計・開発されました．
 
 <mailto:matz@ruby-lang.org>
-
----
-created at: Thu Aug  3 11:57:36 JST 1995
diff --git a/README.md b/README.md
index 869848aad4..02435b419e 100644
--- a/README.md
+++ b/README.md
@@ -1,157 +1,96 @@
-# What's Ruby
+[![Actions Status: MinGW](https://github.com/ruby/ruby/workflows/MinGW/badge.svg)](https://github.com/ruby/ruby/actions?query=workflow%3A"MinGW")
+[![Actions Status: Ubuntu](https://github.com/ruby/ruby/workflows/Ubuntu/badge.svg)](https://github.com/ruby/ruby/actions?query=workflow%3A"Ubuntu")
+[![Actions Status: Windows](https://github.com/ruby/ruby/workflows/Windows/badge.svg)](https://github.com/ruby/ruby/actions?query=workflow%3A"Windows")
+[![Travis Status](https://app.travis-ci.com/ruby/ruby.svg?branch=master)](https://app.travis-ci.com/ruby/ruby)
 
-Ruby is the interpreted scripting language for quick and easy object-oriented
-programming.  It has many features to process text files and to do system
-management tasks (as in Perl).  It is simple, straight-forward, and
-extensible.
+[日本語](rdoc-ref:README.ja.md)
 
-## Features of Ruby
+# What is Ruby?
+
+Ruby is an interpreted object-oriented programming language often
+used for web development. It also offers many scripting features
+to process plain text and serialized files, or manage system tasks.
+It is simple, straightforward, and extensible.
 
-*   Simple Syntax
-*   **Normal** Object-oriented Features (e.g. class, method calls)
-*   **Advanced** Object-oriented Features (e.g. Mix-in, Singleton-method)
-*   Operator Overloading
-*   Exception Handling
-*   Iterators and Closures
-*   Garbage Collection
-*   Dynamic Loading of Object Files (on some architectures)
-*   Highly Portable (works on many Unix-like/POSIX compatible platforms as
-    well as Windows, Mac OS X, BeOS, etc.) cf.
-    http://bugs.ruby-lang.org/projects/ruby-trunk/wiki/SupportedPlatforms
+## Features of Ruby
 
+* Simple Syntax
+* **Normal** Object-oriented Features (e.g. class, method calls)
+* **Advanced** Object-oriented Features (e.g. mix-in, singleton-method)
+* Operator Overloading
+* Exception Handling
+* Iterators and Closures
+* Garbage Collection
+* Dynamic Loading of Object Files (on some architectures)
+* Highly Portable (works on many Unix-like/POSIX compatible platforms as
+  well as Windows, macOS, etc.) cf.
+    https://docs.ruby-lang.org/en/master/maintainers_md.html#label-Platform+Maintainers
 
 ## How to get Ruby
 
 For a complete list of ways to install Ruby, including using third-party tools
 like rvm, see:
 
-http://www.ruby-lang.org/en/downloads/
-
-The Ruby distribution files can be found on the following FTP site:
+https://www.ruby-lang.org/en/downloads/
 
-ftp://ftp.ruby-lang.org/pub/ruby/
+You can download release packages and the snapshot of the repository. If you want to
+download whole versions of Ruby, please visit https://www.ruby-lang.org/en/downloads/releases/.
 
-The trunk of the Ruby source tree can be checked out with the following
-command:
+### Download with Git
 
-    $ svn co http://svn.ruby-lang.org/repos/ruby/trunk/ ruby
+The mirror of the Ruby source tree can be checked out with the following command:
 
-Or if you are using git then use the following command:
+    $ git clone https://github.com/ruby/ruby.git
 
-    $ git clone git://github.com/ruby/ruby.git
-
-There are some other branches under development.  Try the following command
+There are some other branches under development. Try the following command
 to see the list of branches:
 
-    $ svn ls http://svn.ruby-lang.org/repos/ruby/branches/
+    $ git ls-remote https://github.com/ruby/ruby.git
+
+You may also want to use https://git.ruby-lang.org/ruby.git (actual master of Ruby source)
+if you are a committer.
 
-Or if you are using git then use the following command:
+## How to build
 
-    $ git ls-remote git://github.com/ruby/ruby.git
+See [Building Ruby](https://docs.ruby-lang.org/en/master/contributing/building_ruby_md.html)
 
 ## Ruby home page
 
-The URL of the Ruby home page is:
+https://www.ruby-lang.org/
 
-http://www.ruby-lang.org/
+## Documentation
+
+- [English](https://docs.ruby-lang.org/en/master/index.html)
+- [Japanese](https://docs.ruby-lang.org/ja/master/index.html)
 
 ## Mailing list
 
-There is a mailing list to talk about Ruby. To subscribe this list, please
+There is a mailing list to discuss Ruby. To subscribe to this list, please
 send the following phrase:
 
-    subscribe
-
-in the mail body (not subject) to the address
-<mailto:ruby-talk-request@ruby-lang.org>.
-
-## How to compile and install
-
-This is what you need to do to compile and install Ruby:
-
-1.  If you want to use Microsoft Visual C++ to compile ruby, read
-    win32/README.win32 instead of this document.
-
-2.  If `./configure` does not exist or is older than configure.in, run
-    autoconf to (re)generate configure.
-
-3.  Run `./configure`, which will generate config.h and Makefile.
-
-    Some C compiler flags may be added by default depending on your
-    environment.  Specify `optflags=..` and `warnflags=..` as necessary to
-    override them.
-
-4.  Edit `defines.h` if you need. Usually this step will not be needed.
+    join
 
-5.  Remove comment mark(`#`) before the module names from `ext/Setup` (or add
-    module names if not present), if you want to link modules statically.
+in the mail subject (not body) to the address [ruby-talk-request@ml.ruby-lang.org].
 
-    If you don't want to compile non static extension modules (probably on
-    architectures which do not allow dynamic loading), remove comment mark
-    from the line "`#option nodynamic`" in `ext/Setup`.
-
-    Usually this step will not be needed.
-
-6.  Run `make`.
-
-7.  Optionally, run '`make check`' to check whether the compiled Ruby
-    interpreter works well. If you see the message "`check succeeded`", your
-    ruby works as it should (hopefully).
-
-8.  Run '`make install`'
-
-    This command will create following directories and install files onto
-    them.
-
-    *   `${DESTDIR}${prefix}/bin`
-    *   `${DESTDIR}${prefix}/include/ruby-${MAJOR}.${MINOR}.${TEENY}`
-    *   `${DESTDIR}${prefix}/include/ruby-${MAJOR}.${MINOR}.${TEENY}/${PLATFORM}`
-    *   `${DESTDIR}${prefix}/lib`
-    *   `${DESTDIR}${prefix}/lib/ruby`
-    *   `${DESTDIR}${prefix}/lib/ruby/${MAJOR}.${MINOR}.${TEENY}`
-    *   `${DESTDIR}${prefix}/lib/ruby/${MAJOR}.${MINOR}.${TEENY}/${PLATFORM}`
-    *   `${DESTDIR}${prefix}/lib/ruby/site_ruby`
-    *   `${DESTDIR}${prefix}/lib/ruby/site_ruby/${MAJOR}.${MINOR}.${TEENY}`
-    *   `${DESTDIR}${prefix}/lib/ruby/site_ruby/${MAJOR}.${MINOR}.${TEENY}/${PLATFORM}`
-    *   `${DESTDIR}${prefix}/lib/ruby/vendor_ruby`
-    *   `${DESTDIR}${prefix}/lib/ruby/vendor_ruby/${MAJOR}.${MINOR}.${TEENY}`
-    *   `${DESTDIR}${prefix}/lib/ruby/vendor_ruby/${MAJOR}.${MINOR}.${TEENY}/${PLATFORM}`
-    *   `${DESTDIR}${prefix}/lib/ruby/gems/${MAJOR}.${MINOR}.${TEENY}`
-    *   `${DESTDIR}${prefix}/share/man/man1`
-    *   `${DESTDIR}${prefix}/share/ri/${MAJOR}.${MINOR}.${TEENY}/system`
-
-
-    If Ruby's API version is '*x.y.z*', the `${MAJOR}` is '*x*', the
-    `${MINOR}` is '*y*', and the `${TEENY}` is '*z*'.
-
-    **NOTE**: teeny of the API version may be different from one of Ruby's
-    program version
-
-    You may have to be a super user to install ruby.
-
-
-If you fail to compile ruby, please send the detailed error report with the
-error log and machine/OS type, to help others.
-
-Some extension libraries may not get compiled because of lack of necessary
-external libraries and/or headers, then you will need to run '`make distclean-ext`'
-to remove old configuration after installing them in such case.
+[ruby-talk-request@ml.ruby-lang.org]: mailto:ruby-talk-request@ml.ruby-lang.org?subject=join
 
 ## Copying
 
-See the file `COPYING`.
+See the file [COPYING](rdoc-ref:COPYING).
 
 ## Feedback
 
-Questions about the Ruby language can be asked on the Ruby-Talk mailing list
-(http://www.ruby-lang.org/en/community/mailing-lists) or on websites like
-(http://stackoverflow.com).
+Questions about the Ruby language can be asked on the [Ruby-Talk](https://www.ruby-lang.org/en/community/mailing-lists) mailing list
+or on websites like https://stackoverflow.com.
+
+Bugs should be reported at https://bugs.ruby-lang.org. Read ["Reporting Issues"](https://docs.ruby-lang.org/en/master/contributing/reporting_issues_md.html) for more information.
+
+## Contributing
 
-Bug reports should be filed at http://bugs.ruby-lang.org
+See ["Contributing to Ruby"](https://docs.ruby-lang.org/en/master/contributing/contributing_md.html), which includes setup and build instructions.
 
 ## The Author
 
-Ruby was originally designed and developed by Yukihiro Matsumoto (Matz) in
-1995.
+Ruby was originally designed and developed by Yukihiro Matsumoto (Matz) in 1995.
 
-<mailto:matz@ruby-lang.org>
+<matz@ruby-lang.org>
diff --git a/lib/rdoc/generator/template/darkfish/.document b/aclocal.m4
index e69de29bb2..e69de29bb2 100644
--- a/lib/rdoc/generator/template/darkfish/.document
+++ b/aclocal.m4
diff --git a/addr2line.c b/addr2line.c
index c8faf48d62..19a6a425c1 100644
--- a/addr2line.c
+++ b/addr2line.c
@@ -8,14 +8,30 @@
 
 **********************************************************************/
 
-#include "ruby/config.h"
+#if defined(__clang__) && defined(__has_warning)
+#if __has_warning("-Wgnu-empty-initializer")
+#pragma clang diagnostic ignored "-Wgnu-empty-initializer"
+#endif
+#if __has_warning("-Wgcc-compat")
+#pragma clang diagnostic ignored "-Wgcc-compat"
+#endif
+#endif
+
+#include "ruby/internal/config.h"
+#include "ruby/defines.h"
 #include "ruby/missing.h"
 #include "addr2line.h"
 
 #include <stdio.h>
 #include <errno.h>
 
-#ifdef USE_ELF
+#ifdef HAVE_LIBPROC_H
+#include <libproc.h>
+#endif
+
+#include "ruby/internal/stdbool.h"
+
+#if defined(USE_ELF) || defined(HAVE_MACH_O_LOADER_H)
 
 #include <fcntl.h>
 #include <limits.h>
@@ -28,19 +44,11 @@
 #include <sys/stat.h>
 #include <unistd.h>
 
-#ifdef __OpenBSD__
-#include <elf_abi.h>
-#else
-#include <elf.h>
-#endif
-
 /* Make alloca work the best possible way.  */
 #ifdef __GNUC__
-# ifndef atarist
-#  ifndef alloca
-#   define alloca __builtin_alloca
-#  endif
-# endif	/* atarist */
+# ifndef alloca
+#  define alloca __builtin_alloca
+# endif
 #else
 # ifdef HAVE_ALLOCA_H
 #  include <alloca.h>
@@ -48,35 +56,44 @@
 #  ifdef _AIX
 #pragma alloca
 #  else
-#   ifndef alloca		/* predefined by HP cc +Olibcalls */
+#   ifndef alloca                /* predefined by HP cc +Olibcalls */
 void *alloca();
 #   endif
 #  endif /* AIX */
-# endif	/* HAVE_ALLOCA_H */
+# endif        /* HAVE_ALLOCA_H */
+# ifndef UNREACHABLE
+#  define UNREACHABLE __builtin_unreachable()
+# endif
+# ifndef UNREACHABLE_RETURN
+#  define UNREACHABLE_RETURN(_) __builtin_unreachable()
+# endif
 #endif /* __GNUC__ */
 
+#ifndef UNREACHABLE
+# define UNREACHABLE abort()
+#endif
+#ifndef UNREACHABLE_RETURN
+# define UNREACHABLE_RETURN(_) return (abort(), (_))
+#endif
+
 #ifdef HAVE_DLADDR
 # include <dlfcn.h>
 #endif
 
-#define DW_LNS_copy                     0x01
-#define DW_LNS_advance_pc               0x02
-#define DW_LNS_advance_line             0x03
-#define DW_LNS_set_file                 0x04
-#define DW_LNS_set_column               0x05
-#define DW_LNS_negate_stmt              0x06
-#define DW_LNS_set_basic_block          0x07
-#define DW_LNS_const_add_pc             0x08
-#define DW_LNS_fixed_advance_pc         0x09
-#define DW_LNS_set_prologue_end         0x0a /* DWARF3 */
-#define DW_LNS_set_epilogue_begin       0x0b /* DWARF3 */
-#define DW_LNS_set_isa                  0x0c /* DWARF3 */
+#ifdef HAVE_MACH_O_LOADER_H
+# include <crt_externs.h>
+# include <mach-o/fat.h>
+# include <mach-o/loader.h>
+# include <mach-o/nlist.h>
+# include <mach-o/stab.h>
+#endif
 
-/* Line number extended opcode name. */
-#define DW_LNE_end_sequence             0x01
-#define DW_LNE_set_address              0x02
-#define DW_LNE_define_file              0x03
-#define DW_LNE_set_discriminator        0x04  /* DWARF4 */
+#ifdef USE_ELF
+# ifdef __OpenBSD__
+#  include <elf_abi.h>
+# else
+#  include <elf.h>
+# endif
 
 #ifndef ElfW
 # if SIZEOF_VOIDP == 8
@@ -92,13 +109,44 @@ void *alloca();
 #  define ELF_ST_TYPE ELF32_ST_TYPE
 # endif
 #endif
+#endif
+
+#ifdef SHF_COMPRESSED
+# if defined(ELFCOMPRESS_ZLIB) && defined(HAVE_LIBZ)
+   /* FreeBSD 11.0 lacks ELFCOMPRESS_ZLIB */
+#  include <zlib.h>
+#  define SUPPORT_COMPRESSED_DEBUG_LINE
+# endif
+#else /* compatibility with glibc < 2.22 */
+# define SHF_COMPRESSED 0
+#endif
+
 #ifndef PATH_MAX
 #define PATH_MAX 4096
 #endif
 
-int kprintf(const char *fmt, ...);
+#define DW_LNS_copy                     0x01
+#define DW_LNS_advance_pc               0x02
+#define DW_LNS_advance_line             0x03
+#define DW_LNS_set_file                 0x04
+#define DW_LNS_set_column               0x05
+#define DW_LNS_negate_stmt              0x06
+#define DW_LNS_set_basic_block          0x07
+#define DW_LNS_const_add_pc             0x08
+#define DW_LNS_fixed_advance_pc         0x09
+#define DW_LNS_set_prologue_end         0x0a /* DWARF3 */
+#define DW_LNS_set_epilogue_begin       0x0b /* DWARF3 */
+#define DW_LNS_set_isa                  0x0c /* DWARF3 */
+
+/* Line number extended opcode name. */
+#define DW_LNE_end_sequence             0x01
+#define DW_LNE_set_address              0x02
+#define DW_LNE_define_file              0x03
+#define DW_LNE_set_discriminator        0x04  /* DWARF4 */
 
-typedef struct {
+#define kprintf(...) fprintf(errout, "" __VA_ARGS__)
+
+typedef struct line_info {
     const char *dirname;
     const char *filename;
     const char *path; /* object path */
@@ -107,368 +155,1913 @@ typedef struct {
     uintptr_t base_addr;
     uintptr_t saddr;
     const char *sname; /* function name */
+
+    struct line_info *next;
 } line_info_t;
-typedef struct obj_info obj_info_t;
-struct obj_info {
+
+struct dwarf_section {
+    char *ptr;
+    size_t size;
+    uint64_t flags;
+};
+
+typedef struct obj_info {
     const char *path; /* object path */
-    int fd;
-    void *mapped;
+    char *mapped;
     size_t mapped_size;
+    void *uncompressed;
     uintptr_t base_addr;
-    obj_info_t *next;
+    uintptr_t vmaddr;
+    struct dwarf_section debug_abbrev;
+    struct dwarf_section debug_info;
+    struct dwarf_section debug_line;
+    struct dwarf_section debug_ranges;
+    struct dwarf_section debug_str_offsets;
+    struct dwarf_section debug_addr;
+    struct dwarf_section debug_rnglists;
+    struct dwarf_section debug_str;
+    struct dwarf_section debug_line_str;
+    struct obj_info *next;
+} obj_info_t;
+
+#define DWARF_SECTION_COUNT 9
+
+static struct dwarf_section *
+obj_dwarf_section_at(obj_info_t *obj, int n)
+{
+    struct dwarf_section *ary[] = {
+        &obj->debug_abbrev,
+        &obj->debug_info,
+        &obj->debug_line,
+        &obj->debug_ranges,
+        &obj->debug_str_offsets,
+        &obj->debug_addr,
+        &obj->debug_rnglists,
+        &obj->debug_str,
+        &obj->debug_line_str
+    };
+    if (n < 0 || DWARF_SECTION_COUNT <= n) {
+        UNREACHABLE_RETURN(0);
+    }
+    return ary[n];
+}
+
+struct debug_section_definition {
+    const char *name;
+    struct dwarf_section *dwarf;
 };
 
 /* Avoid consuming stack as this module may be used from signal handler */
-static char binary_filename[PATH_MAX];
+static char binary_filename[PATH_MAX + 1];
 
 static unsigned long
-uleb128(char **p)
+uleb128(const char **p)
 {
     unsigned long r = 0;
     int s = 0;
     for (;;) {
-	unsigned char b = *(unsigned char *)(*p)++;
-	if (b < 0x80) {
-	    r += (unsigned long)b << s;
-	    break;
-	}
-	r += (b & 0x7f) << s;
-	s += 7;
+        unsigned char b = (unsigned char)*(*p)++;
+        if (b < 0x80) {
+            r += (unsigned long)b << s;
+            break;
+        }
+        r += (b & 0x7f) << s;
+        s += 7;
     }
     return r;
 }
 
 static long
-sleb128(char **p)
+sleb128(const char **p)
 {
     long r = 0;
     int s = 0;
     for (;;) {
-	unsigned char b = *(unsigned char *)(*p)++;
-	if (b < 0x80) {
-	    if (b & 0x40) {
-		r -= (0x80 - b) << s;
-	    }
-	    else {
-		r += (b & 0x3f) << s;
-	    }
-	    break;
-	}
-	r += (b & 0x7f) << s;
-	s += 7;
+        unsigned char b = (unsigned char)*(*p)++;
+        if (b < 0x80) {
+            if (b & 0x40) {
+                r -= (0x80 - b) << s;
+            }
+            else {
+                r += (b & 0x3f) << s;
+            }
+            break;
+        }
+        r += (b & 0x7f) << s;
+        s += 7;
     }
     return r;
 }
 
 static const char *
-get_nth_dirname(unsigned long dir, char *p)
+get_nth_dirname(unsigned long dir, const char *p, FILE *errout)
 {
     if (!dir--) {
-	return "";
+        return "";
     }
     while (dir--) {
-	while (*p) p++;
-	p++;
-	if (!*p) {
-	    kprintf("Unexpected directory number %lu in %s\n",
-		    dir, binary_filename);
-	    return "";
-	}
+        while (*p) p++;
+        p++;
+        if (!*p) {
+            kprintf("Unexpected directory number %lu in %s\n",
+                    dir, binary_filename);
+            return "";
+        }
     }
     return p;
 }
 
+static const char *parse_ver5_debug_line_header(
+    const char *p, int idx, uint8_t format,
+    obj_info_t *obj, const char **out_path,
+    uint64_t *out_directory_index, FILE *errout);
+
 static void
-fill_filename(int file, char *include_directories, char *filenames,
-	      line_info_t *line)
+fill_filename(int file, uint8_t format, uint16_t version, const char *include_directories,
+              const char *filenames, line_info_t *line, obj_info_t *obj, FILE *errout)
 {
     int i;
-    char *p = filenames;
-    char *filename;
+    const char *p = filenames;
+    const char *filename;
     unsigned long dir;
-    for (i = 1; i <= file; i++) {
-	filename = p;
-	if (!*p) {
-	    /* Need to output binary file name? */
-	    kprintf("Unexpected file number %d in %s\n",
-		    file, binary_filename);
-	    return;
-	}
-	while (*p) p++;
-	p++;
-	dir = uleb128(&p);
-	/* last modified. */
-	uleb128(&p);
-	/* size of the file. */
-	uleb128(&p);
-
-	if (i == file) {
-	    line->filename = filename;
-	    line->dirname = get_nth_dirname(dir, include_directories);
-	}
+    if (version >= 5) {
+        const char *path;
+        uint64_t directory_index = -1;
+        parse_ver5_debug_line_header(filenames, file, format, obj, &path, &directory_index, errout);
+        line->filename = path;
+        parse_ver5_debug_line_header(include_directories, (int)directory_index, format, obj, &path, NULL, errout);
+        line->dirname = path;
+    }
+    else {
+        for (i = 1; i <= file; i++) {
+            filename = p;
+            if (!*p) {
+#ifndef __APPLE__
+                /* Need to output binary file name? */
+                kprintf("Unexpected file number %d in %s at %tx\n",
+                        file, binary_filename, filenames - obj->mapped);
+#endif
+                return;
+            }
+            while (*p) p++;
+            p++;
+            dir = uleb128(&p);
+            /* last modified. */
+            uleb128(&p);
+            /* size of the file. */
+            uleb128(&p);
+
+            if (i == file) {
+                line->filename = filename;
+                line->dirname = get_nth_dirname(dir, include_directories, errout);
+            }
+        }
     }
 }
 
 static void
 fill_line(int num_traces, void **traces, uintptr_t addr, int file, int line,
-	  char *include_directories, char *filenames,
-	  obj_info_t *obj, line_info_t *lines, int offset)
+          uint8_t format, uint16_t version, const char *include_directories, const char *filenames,
+          obj_info_t *obj, line_info_t *lines, int offset, FILE *errout)
 {
     int i;
-    addr += obj->base_addr;
+    addr += obj->base_addr - obj->vmaddr;
     for (i = offset; i < num_traces; i++) {
-	uintptr_t a = (uintptr_t)traces[i];
-	/* We assume one line code doesn't result >100 bytes of native code.
+        uintptr_t a = (uintptr_t)traces[i];
+        /* We assume one line code doesn't result >100 bytes of native code.
        We may want more reliable way eventually... */
-	if (addr < a && a < addr + 100) {
-	    fill_filename(file, include_directories, filenames, &lines[i]);
-	    lines[i].line = line;
-	}
+        if (addr < a && a < addr + 100) {
+            fill_filename(file, format, version, include_directories, filenames, &lines[i], obj, errout);
+            lines[i].line = line;
+        }
     }
 }
 
-static void
-parse_debug_line_cu(int num_traces, void **traces, char **debug_line,
-		obj_info_t *obj, line_info_t *lines, int offset)
-{
-    char *p, *cu_end, *cu_start, *include_directories, *filenames;
-    unsigned long unit_length;
-    int default_is_stmt, line_base;
-    unsigned int header_length, minimum_instruction_length, line_range,
-		 opcode_base;
-    /* unsigned char *standard_opcode_lengths; */
-
-    /* The registers. */
-    unsigned long addr = 0;
-    unsigned int file = 1;
-    unsigned int line = 1;
-    /* unsigned int column = 0; */
-    int is_stmt;
-    /* int basic_block = 0; */
-    /* int end_sequence = 0; */
-    /* int prologue_end = 0; */
-    /* int epilogue_begin = 0; */
-    /* unsigned int isa = 0; */
-
-    p = *debug_line;
+struct LineNumberProgramHeader {
+    uint64_t unit_length;
+    uint16_t version;
+    uint8_t format; /* 4 or 8 */
+    uint64_t header_length;
+    uint8_t minimum_instruction_length;
+    uint8_t maximum_operations_per_instruction;
+    uint8_t default_is_stmt;
+    int8_t line_base;
+    uint8_t line_range;
+    uint8_t opcode_base;
+    /* uint8_t standard_opcode_lengths[opcode_base-1]; */
+    const char *include_directories;
+    const char *filenames;
+    const char *cu_start;
+    const char *cu_end;
+};
 
-    unit_length = *(unsigned int *)p;
-    p += sizeof(unsigned int);
-    if (unit_length == 0xffffffff) {
-	unit_length = *(unsigned long *)p;
-	p += sizeof(unsigned long);
+static int
+parse_debug_line_header(obj_info_t *obj, const char **pp, struct LineNumberProgramHeader *header, FILE *errout)
+{
+    const char *p = *pp;
+    header->unit_length = *(uint32_t *)p;
+    p += sizeof(uint32_t);
+
+    header->format = 4;
+    if (header->unit_length == 0xffffffff) {
+        header->unit_length = *(uint64_t *)p;
+        p += sizeof(uint64_t);
+        header->format = 8;
     }
 
-    cu_end = p + unit_length;
+    header->cu_end = p + header->unit_length;
 
-    /*dwarf_version = *(unsigned short *)p;*/
-    p += 2;
+    header->version = *(uint16_t *)p;
+    p += sizeof(uint16_t);
+    if (header->version > 5) return -1;
 
-    header_length = *(unsigned int *)p;
-    p += sizeof(unsigned int);
+    if (header->version >= 5) {
+        /* address_size = *(uint8_t *)p++; */
+        /* segment_selector_size = *(uint8_t *)p++; */
+        p += 2;
+    }
 
-    cu_start = p + header_length;
+    header->header_length = header->format == 4 ? *(uint32_t *)p : *(uint64_t *)p;
+    p += header->format;
+    header->cu_start = p + header->header_length;
 
-    minimum_instruction_length = *(unsigned char *)p;
-    p++;
+    header->minimum_instruction_length = *(uint8_t *)p++;
 
-    is_stmt = default_is_stmt = *(unsigned char *)p;
-    p++;
+    if (header->version >= 4) {
+        /* maximum_operations_per_instruction = *(uint8_t *)p; */
+        if (*p != 1) return -1; /* For non-VLIW architectures, this field is 1 */
+        p++;
+    }
 
-    line_base = *(signed char *)p;
-    p++;
+    header->default_is_stmt = *(uint8_t *)p++;
+    header->line_base = *(int8_t *)p++;
+    header->line_range = *(uint8_t *)p++;
+    header->opcode_base = *(uint8_t *)p++;
+    /* header->standard_opcode_lengths = (uint8_t *)p - 1; */
+    p += header->opcode_base - 1;
+
+    if (header->version >= 5) {
+        header->include_directories = p;
+        p = parse_ver5_debug_line_header(p, -1, header->format, obj, NULL, NULL, errout);
+        header->filenames = p;
+    }
+    else {
+        header->include_directories = p;
 
-    line_range = *(unsigned char *)p;
-    p++;
+        /* temporary measure for compress-debug-sections */
+        if (p >= header->cu_end) return -1;
 
-    opcode_base = *(unsigned char *)p;
-    p++;
+        /* skip include directories */
+        while (*p) {
+            p = memchr(p, '\0', header->cu_end - p);
+            if (!p) return -1;
+            p++;
+        }
+        p++;
 
-    /* standard_opcode_lengths = (unsigned char *)p - 1; */
-    p += opcode_base - 1;
+        header->filenames = p;
+    }
 
-    include_directories = p;
+    *pp = header->cu_start;
 
-    /* skip include directories */
-    while (*p) {
-	while (*p) p++;
-	p++;
-    }
-    p++;
+    return 0;
+}
 
-    filenames = p;
+static int
+parse_debug_line_cu(int num_traces, void **traces, const char **debug_line,
+                obj_info_t *obj, line_info_t *lines, int offset, FILE *errout)
+{
+    const char *p = (const char *)*debug_line;
+    struct LineNumberProgramHeader header;
 
-    p = cu_start;
+    /* The registers. */
+    unsigned long addr = 0;
+    unsigned int file = 1;
+    unsigned int line = 1;
+    /* unsigned int column = 0; */
+    int is_stmt;
+    /* int basic_block = 0; */
+    /* int end_sequence = 0; */
+    /* int prologue_end = 0; */
+    /* int epilogue_begin = 0; */
+    /* unsigned int isa = 0; */
 
-#define FILL_LINE()						    \
-    do {							    \
-	fill_line(num_traces, traces, addr, file, line,		    \
-		  include_directories, filenames,		    \
-		  obj, lines, offset);				    \
-	/*basic_block = prologue_end = epilogue_begin = 0;*/	    \
+    if (parse_debug_line_header(obj, &p, &header, errout))
+        return -1;
+    is_stmt = header.default_is_stmt;
+
+#define FILL_LINE()                                                 \
+    do {                                                            \
+        fill_line(num_traces, traces, addr, file, line,             \
+                  header.format,                                    \
+                  header.version,                                   \
+                  header.include_directories,                       \
+                  header.filenames,                                 \
+                  obj, lines, offset, errout);                      \
+        /*basic_block = prologue_end = epilogue_begin = 0;*/        \
     } while (0)
 
-    while (p < cu_end) {
-	unsigned long a;
-	unsigned char op = *p++;
-	switch (op) {
-	case DW_LNS_copy:
-	    FILL_LINE();
-	    break;
-	case DW_LNS_advance_pc:
-	    a = uleb128(&p);
-	    addr += a;
-	    break;
-	case DW_LNS_advance_line: {
-	    long a = sleb128(&p);
-	    line += a;
-	    break;
-	}
-	case DW_LNS_set_file:
-	    file = (unsigned int)uleb128(&p);
-	    break;
-	case DW_LNS_set_column:
-	    /*column = (unsigned int)*/(void)uleb128(&p);
-	    break;
-	case DW_LNS_negate_stmt:
-	    is_stmt = !is_stmt;
-	    break;
-	case DW_LNS_set_basic_block:
-	    /*basic_block = 1; */
-	    break;
-	case DW_LNS_const_add_pc:
-	    a = ((255 - opcode_base) / line_range) *
-		minimum_instruction_length;
-	    addr += a;
-	    break;
-	case DW_LNS_fixed_advance_pc:
-	    a = *(unsigned char *)p++;
-	    addr += a;
-	    break;
-	case DW_LNS_set_prologue_end:
-	    /* prologue_end = 1; */
-	    break;
-	case DW_LNS_set_epilogue_begin:
-	    /* epilogue_begin = 1; */
-	    break;
-	case DW_LNS_set_isa:
-	    /* isa = (unsigned int)*/(void)uleb128(&p);
-	    break;
-	case 0:
-	    a = *(unsigned char *)p++;
-	    op = *p++;
-	    switch (op) {
-	    case DW_LNE_end_sequence:
-		/* end_sequence = 1; */
-		FILL_LINE();
-		addr = 0;
-		file = 1;
-		line = 1;
-		/* column = 0; */
-		is_stmt = default_is_stmt;
-		/* end_sequence = 0; */
-		/* isa = 0; */
-		break;
-	    case DW_LNE_set_address:
-		addr = *(unsigned long *)p;
-		p += sizeof(unsigned long);
-		break;
-	    case DW_LNE_define_file:
-		kprintf("Unsupported operation in %s\n",
-			binary_filename);
-		break;
-	    case DW_LNE_set_discriminator:
-		/* TODO:currently ignore */
-		uleb128(&p);
-		break;
-	    default:
-		kprintf("Unknown extended opcode: %d in %s\n",
-			op, binary_filename);
-	    }
-	    break;
-	default: {
-	    unsigned long addr_incr;
-	    unsigned long line_incr;
-	    a = op - opcode_base;
-	    addr_incr = (a / line_range) * minimum_instruction_length;
-	    line_incr = line_base + (a % line_range);
-	    addr += (unsigned int)addr_incr;
-	    line += (unsigned int)line_incr;
-	    FILL_LINE();
-	}
-	}
-    }
-    *debug_line = p;
+    while (p < header.cu_end) {
+        unsigned long a;
+        unsigned char op = *p++;
+        switch (op) {
+        case DW_LNS_copy:
+            FILL_LINE();
+            break;
+        case DW_LNS_advance_pc:
+            a = uleb128(&p) * header.minimum_instruction_length;
+            addr += a;
+            break;
+        case DW_LNS_advance_line: {
+            long a = sleb128(&p);
+            line += a;
+            break;
+        }
+        case DW_LNS_set_file:
+            file = (unsigned int)uleb128(&p);
+            break;
+        case DW_LNS_set_column:
+            /*column = (unsigned int)*/(void)uleb128(&p);
+            break;
+        case DW_LNS_negate_stmt:
+            is_stmt = !is_stmt;
+            break;
+        case DW_LNS_set_basic_block:
+            /*basic_block = 1; */
+            break;
+        case DW_LNS_const_add_pc:
+            a = ((255UL - header.opcode_base) / header.line_range) *
+                header.minimum_instruction_length;
+            addr += a;
+            break;
+        case DW_LNS_fixed_advance_pc:
+            a = *(uint16_t *)p;
+            p += sizeof(uint16_t);
+            addr += a;
+            break;
+        case DW_LNS_set_prologue_end:
+            /* prologue_end = 1; */
+            break;
+        case DW_LNS_set_epilogue_begin:
+            /* epilogue_begin = 1; */
+            break;
+        case DW_LNS_set_isa:
+            /* isa = (unsigned int)*/(void)uleb128(&p);
+            break;
+        case 0:
+            a = uleb128(&p);
+            op = *p++;
+            switch (op) {
+            case DW_LNE_end_sequence:
+                /* end_sequence = 1; */
+                FILL_LINE();
+                addr = 0;
+                file = 1;
+                line = 1;
+                /* column = 0; */
+                is_stmt = header.default_is_stmt;
+                /* end_sequence = 0; */
+                /* isa = 0; */
+                break;
+            case DW_LNE_set_address:
+                addr = *(unsigned long *)p;
+                p += sizeof(unsigned long);
+                break;
+            case DW_LNE_define_file:
+                kprintf("Unsupported operation in %s\n",
+                        binary_filename);
+                break;
+            case DW_LNE_set_discriminator:
+                /* TODO:currently ignore */
+                uleb128(&p);
+                break;
+            default:
+                kprintf("Unknown extended opcode: %d in %s\n",
+                        op, binary_filename);
+            }
+            break;
+        default: {
+            uint8_t adjusted_opcode = op - header.opcode_base;
+            uint8_t operation_advance = adjusted_opcode / header.line_range;
+            /* NOTE: this code doesn't support VLIW */
+            addr += operation_advance * header.minimum_instruction_length;
+            line += header.line_base + (adjusted_opcode % header.line_range);
+            FILL_LINE();
+        }
+        }
+    }
+    *debug_line = (char *)p;
+    return 0;
 }
 
-static void
+static int
 parse_debug_line(int num_traces, void **traces,
-		 char *debug_line, unsigned long size,
-		 obj_info_t *obj, line_info_t *lines, int offset)
+                 const char *debug_line, unsigned long size,
+                 obj_info_t *obj, line_info_t *lines, int offset, FILE *errout)
 {
-    char *debug_line_end = debug_line + size;
+    const char *debug_line_end = debug_line + size;
     while (debug_line < debug_line_end) {
-	parse_debug_line_cu(num_traces, traces, &debug_line, obj, lines, offset);
+        if (parse_debug_line_cu(num_traces, traces, &debug_line, obj, lines, offset, errout))
+            return -1;
     }
     if (debug_line != debug_line_end) {
-	kprintf("Unexpected size of .debug_line in %s\n",
-		binary_filename);
+        kprintf("Unexpected size of .debug_line in %s\n",
+                binary_filename);
     }
+    return 0;
 }
 
 /* read file and fill lines */
 static uintptr_t
 fill_lines(int num_traces, void **traces, int check_debuglink,
-	   obj_info_t **objp, line_info_t *lines, int offset);
+           obj_info_t **objp, line_info_t *lines, int offset, FILE *errout);
 
 static void
-append_obj(obj_info_t **objp) {
+append_obj(obj_info_t **objp)
+{
     obj_info_t *newobj = calloc(1, sizeof(obj_info_t));
     if (*objp) (*objp)->next = newobj;
     *objp = newobj;
 }
 
+#ifdef USE_ELF
+/* Ideally we should check 4 paths to follow gnu_debuglink:
+ *
+ *   - /usr/lib/debug/.build-id/ab/cdef1234.debug
+ *   - /usr/bin/ruby.debug
+ *   - /usr/bin/.debug/ruby.debug
+ *   - /usr/lib/debug/usr/bin/ruby.debug.
+ *
+ * but we handle only two cases for now as the two formats are
+ * used by some linux distributions.
+ *
+ * See GDB's info for detail.
+ * https://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html
+ */
+
+// check the path pattern of "/usr/lib/debug/usr/bin/ruby.debug"
 static void
-follow_debuglink(char *debuglink, int num_traces, void **traces,
-		 obj_info_t **objp, line_info_t *lines, int offset)
+follow_debuglink(const char *debuglink, int num_traces, void **traces,
+                 obj_info_t **objp, line_info_t *lines, int offset, FILE *errout)
 {
-    /* Ideally we should check 4 paths to follow gnu_debuglink,
-       but we handle only one case for now as this format is used
-       by some linux distributions. See GDB's info for detail. */
     static const char global_debug_dir[] = "/usr/lib/debug";
-    char *p, *subdir;
+    const size_t global_debug_dir_len = sizeof(global_debug_dir) - 1;
+    char *p;
     obj_info_t *o1 = *objp, *o2;
+    size_t len;
 
     p = strrchr(binary_filename, '/');
     if (!p) {
-	return;
+        return;
     }
     p[1] = '\0';
 
-    subdir = (char *)alloca(strlen(binary_filename) + 1);
-    strcpy(subdir, binary_filename);
-    strcpy(binary_filename, global_debug_dir);
-    strlcat(binary_filename, subdir, PATH_MAX);
-    strlcat(binary_filename, debuglink, PATH_MAX);
+    len = strlen(binary_filename);
+    if (len >= PATH_MAX - global_debug_dir_len)
+        len = PATH_MAX - global_debug_dir_len - 1;
+    memmove(binary_filename + global_debug_dir_len, binary_filename, len);
+    memcpy(binary_filename, global_debug_dir, global_debug_dir_len);
+    len += global_debug_dir_len;
+    strlcpy(binary_filename + len, debuglink, PATH_MAX - len);
+
+    append_obj(objp);
+    o2 = *objp;
+    o2->base_addr = o1->base_addr;
+    o2->path = o1->path;
+    fill_lines(num_traces, traces, 0, objp, lines, offset, errout);
+}
+
+// check the path pattern of "/usr/lib/debug/.build-id/ab/cdef1234.debug"
+static void
+follow_debuglink_build_id(const char *build_id, size_t build_id_size, int num_traces, void **traces,
+                          obj_info_t **objp, line_info_t *lines, int offset, FILE *errout)
+{
+    static const char global_debug_dir[] = "/usr/lib/debug/.build-id/";
+    static const char debug_suffix[] = ".debug";
+    const size_t global_debug_dir_len = sizeof(global_debug_dir) - 1;
+    char *p;
+    obj_info_t *o1 = *objp, *o2;
+    size_t i;
+
+    if (PATH_MAX < global_debug_dir_len + build_id_size * 2 + sizeof(debug_suffix)) return;
+
+    memcpy(binary_filename, global_debug_dir, global_debug_dir_len);
+    p = binary_filename + global_debug_dir_len;
+    for (i = 0; i < build_id_size; i++) {
+        static const char tbl[] = "0123456789abcdef";
+        unsigned char n = build_id[i];
+        *p++ = tbl[n / 16];
+        *p++ = tbl[n % 16];
+        if (i == 0) *p++ = '/';
+    }
+    memcpy(p, debug_suffix, sizeof(debug_suffix));
 
     append_obj(objp);
     o2 = *objp;
     o2->base_addr = o1->base_addr;
     o2->path = o1->path;
-    fill_lines(num_traces, traces, 0, objp, lines, offset);
+    fill_lines(num_traces, traces, 0, objp, lines, offset, errout);
+}
+#endif
+
+enum
+{
+    DW_TAG_compile_unit = 0x11,
+    DW_TAG_inlined_subroutine = 0x1d,
+    DW_TAG_subprogram = 0x2e,
+};
+
+/* Attributes encodings */
+enum
+{
+    DW_AT_sibling = 0x01,
+    DW_AT_location = 0x02,
+    DW_AT_name = 0x03,
+    /* Reserved 0x04 */
+    /* Reserved 0x05 */
+    /* Reserved 0x06 */
+    /* Reserved 0x07 */
+    /* Reserved 0x08 */
+    DW_AT_ordering = 0x09,
+    /* Reserved 0x0a */
+    DW_AT_byte_size = 0x0b,
+    /* Reserved 0x0c */
+    DW_AT_bit_size = 0x0d,
+    /* Reserved 0x0e */
+    /* Reserved 0x0f */
+    DW_AT_stmt_list = 0x10,
+    DW_AT_low_pc = 0x11,
+    DW_AT_high_pc = 0x12,
+    DW_AT_language = 0x13,
+    /* Reserved 0x14 */
+    DW_AT_discr = 0x15,
+    DW_AT_discr_value = 0x16,
+    DW_AT_visibility = 0x17,
+    DW_AT_import = 0x18,
+    DW_AT_string_length = 0x19,
+    DW_AT_common_reference = 0x1a,
+    DW_AT_comp_dir = 0x1b,
+    DW_AT_const_value = 0x1c,
+    DW_AT_containing_type = 0x1d,
+    DW_AT_default_value = 0x1e,
+    /* Reserved 0x1f */
+    DW_AT_inline = 0x20,
+    DW_AT_is_optional = 0x21,
+    DW_AT_lower_bound = 0x22,
+    /* Reserved 0x23 */
+    /* Reserved 0x24 */
+    DW_AT_producer = 0x25,
+    /* Reserved 0x26 */
+    DW_AT_prototyped = 0x27,
+    /* Reserved 0x28 */
+    /* Reserved 0x29 */
+    DW_AT_return_addr = 0x2a,
+    /* Reserved 0x2b */
+    DW_AT_start_scope = 0x2c,
+    /* Reserved 0x2d */
+    DW_AT_bit_stride = 0x2e,
+    DW_AT_upper_bound = 0x2f,
+    /* Reserved 0x30 */
+    DW_AT_abstract_origin = 0x31,
+    DW_AT_accessibility = 0x32,
+    DW_AT_address_class = 0x33,
+    DW_AT_artificial = 0x34,
+    DW_AT_base_types = 0x35,
+    DW_AT_calling_convention = 0x36,
+    DW_AT_count = 0x37,
+    DW_AT_data_member_location = 0x38,
+    DW_AT_decl_column = 0x39,
+    DW_AT_decl_file = 0x3a,
+    DW_AT_decl_line = 0x3b,
+    DW_AT_declaration = 0x3c,
+    DW_AT_discr_list = 0x3d,
+    DW_AT_encoding = 0x3e,
+    DW_AT_external = 0x3f,
+    DW_AT_frame_base = 0x40,
+    DW_AT_friend = 0x41,
+    DW_AT_identifier_case = 0x42,
+    /* Reserved 0x43 */
+    DW_AT_namelist_item = 0x44,
+    DW_AT_priority = 0x45,
+    DW_AT_segment = 0x46,
+    DW_AT_specification = 0x47,
+    DW_AT_static_link = 0x48,
+    DW_AT_type = 0x49,
+    DW_AT_use_location = 0x4a,
+    DW_AT_variable_parameter = 0x4b,
+    DW_AT_virtuality = 0x4c,
+    DW_AT_vtable_elem_location = 0x4d,
+    DW_AT_allocated = 0x4e,
+    DW_AT_associated = 0x4f,
+    DW_AT_data_location = 0x50,
+    DW_AT_byte_stride = 0x51,
+    DW_AT_entry_pc = 0x52,
+    DW_AT_use_UTF8 = 0x53,
+    DW_AT_extension = 0x54,
+    DW_AT_ranges = 0x55,
+    DW_AT_trampoline = 0x56,
+    DW_AT_call_column = 0x57,
+    DW_AT_call_file = 0x58,
+    DW_AT_call_line = 0x59,
+    DW_AT_description = 0x5a,
+    DW_AT_binary_scale = 0x5b,
+    DW_AT_decimal_scale = 0x5c,
+    DW_AT_small = 0x5d,
+    DW_AT_decimal_sign = 0x5e,
+    DW_AT_digit_count = 0x5f,
+    DW_AT_picture_string = 0x60,
+    DW_AT_mutable = 0x61,
+    DW_AT_threads_scaled = 0x62,
+    DW_AT_explicit = 0x63,
+    DW_AT_object_pointer = 0x64,
+    DW_AT_endianity = 0x65,
+    DW_AT_elemental = 0x66,
+    DW_AT_pure = 0x67,
+    DW_AT_recursive = 0x68,
+    DW_AT_signature = 0x69,
+    DW_AT_main_subprogram = 0x6a,
+    DW_AT_data_bit_offset = 0x6b,
+    DW_AT_const_expr = 0x6c,
+    DW_AT_enum_class = 0x6d,
+    DW_AT_linkage_name = 0x6e,
+    DW_AT_string_length_bit_size = 0x6f,
+    DW_AT_string_length_byte_size = 0x70,
+    DW_AT_rank = 0x71,
+    DW_AT_str_offsets_base = 0x72,
+    DW_AT_addr_base = 0x73,
+    DW_AT_rnglists_base = 0x74,
+    /* Reserved 0x75 */
+    DW_AT_dwo_name = 0x76,
+    DW_AT_reference = 0x77,
+    DW_AT_rvalue_reference = 0x78,
+    DW_AT_macros = 0x79,
+    DW_AT_call_all_calls = 0x7a,
+    DW_AT_call_all_source_calls = 0x7b,
+    DW_AT_call_all_tail_calls = 0x7c,
+    DW_AT_call_return_pc = 0x7d,
+    DW_AT_call_value = 0x7e,
+    DW_AT_call_origin = 0x7f,
+    DW_AT_call_parameter = 0x80,
+    DW_AT_call_pc = 0x81,
+    DW_AT_call_tail_call = 0x82,
+    DW_AT_call_target = 0x83,
+    DW_AT_call_target_clobbered = 0x84,
+    DW_AT_call_data_location = 0x85,
+    DW_AT_call_data_value = 0x86,
+    DW_AT_noreturn = 0x87,
+    DW_AT_alignment = 0x88,
+    DW_AT_export_symbols = 0x89,
+    DW_AT_deleted = 0x8a,
+    DW_AT_defaulted = 0x8b,
+    DW_AT_loclists_base = 0x8c,
+    DW_AT_lo_user = 0x2000,
+    DW_AT_hi_user = 0x3fff
+};
+
+/* Attribute form encodings */
+enum
+{
+    DW_FORM_addr = 0x01,
+    /* Reserved 0x02 */
+    DW_FORM_block2 = 0x03,
+    DW_FORM_block4 = 0x04,
+    DW_FORM_data2 = 0x05,
+    DW_FORM_data4 = 0x06,
+    DW_FORM_data8 = 0x07,
+    DW_FORM_string = 0x08,
+    DW_FORM_block = 0x09,
+    DW_FORM_block1 = 0x0a,
+    DW_FORM_data1 = 0x0b,
+    DW_FORM_flag = 0x0c,
+    DW_FORM_sdata = 0x0d,
+    DW_FORM_strp = 0x0e,
+    DW_FORM_udata = 0x0f,
+    DW_FORM_ref_addr = 0x10,
+    DW_FORM_ref1 = 0x11,
+    DW_FORM_ref2 = 0x12,
+    DW_FORM_ref4 = 0x13,
+    DW_FORM_ref8 = 0x14,
+    DW_FORM_ref_udata = 0x15,
+    DW_FORM_indirect = 0x16,
+    DW_FORM_sec_offset = 0x17,
+    DW_FORM_exprloc = 0x18,
+    DW_FORM_flag_present = 0x19,
+    DW_FORM_strx = 0x1a,
+    DW_FORM_addrx = 0x1b,
+    DW_FORM_ref_sup4 = 0x1c,
+    DW_FORM_strp_sup = 0x1d,
+    DW_FORM_data16 = 0x1e,
+    DW_FORM_line_strp = 0x1f,
+    DW_FORM_ref_sig8 = 0x20,
+    DW_FORM_implicit_const = 0x21,
+    DW_FORM_loclistx = 0x22,
+    DW_FORM_rnglistx = 0x23,
+    DW_FORM_ref_sup8 = 0x24,
+    DW_FORM_strx1 = 0x25,
+    DW_FORM_strx2 = 0x26,
+    DW_FORM_strx3 = 0x27,
+    DW_FORM_strx4 = 0x28,
+    DW_FORM_addrx1 = 0x29,
+    DW_FORM_addrx2 = 0x2a,
+    DW_FORM_addrx3 = 0x2b,
+    DW_FORM_addrx4 = 0x2c,
+
+    /* GNU extensions for referring to .gnu_debugaltlink dwz-compressed info */
+    DW_FORM_GNU_ref_alt = 0x1f20,
+    DW_FORM_GNU_strp_alt = 0x1f21
+};
+
+/* Range list entry encodings */
+enum {
+    DW_RLE_end_of_list = 0x00,
+    DW_RLE_base_addressx = 0x01,
+    DW_RLE_startx_endx = 0x02,
+    DW_RLE_startx_length = 0x03,
+    DW_RLE_offset_pair = 0x04,
+    DW_RLE_base_address = 0x05,
+    DW_RLE_start_end = 0x06,
+    DW_RLE_start_length = 0x07
+};
+
+enum {
+    VAL_none = 0,
+    VAL_cstr = 1,
+    VAL_data = 2,
+    VAL_uint = 3,
+    VAL_int = 4,
+    VAL_addr = 5
+};
+
+# define ABBREV_TABLE_SIZE 256
+typedef struct {
+    obj_info_t *obj;
+    const char *file;
+    uint8_t current_version;
+    const char *current_cu;
+    uint64_t current_low_pc;
+    uint64_t current_str_offsets_base;
+    uint64_t current_addr_base;
+    uint64_t current_rnglists_base;
+    const char *debug_line_cu_end;
+    uint8_t debug_line_format;
+    uint16_t debug_line_version;
+    const char *debug_line_files;
+    const char *debug_line_directories;
+    const char *p;
+    const char *cu_end;
+    const char *pend;
+    const char *q0;
+    const char *q;
+    int format; // 4 or 8
+    uint8_t address_size;
+    int level;
+    const char *abbrev_table[ABBREV_TABLE_SIZE];
+} DebugInfoReader;
+
+typedef struct {
+    ptrdiff_t pos;
+    int tag;
+    int has_children;
+} DIE;
+
+typedef struct {
+    union {
+        const char *ptr;
+        uint64_t uint64;
+        int64_t int64;
+        uint64_t addr_idx;
+    } as;
+    uint64_t off;
+    uint64_t at;
+    uint64_t form;
+    size_t size;
+    int type;
+} DebugInfoValue;
+
+#if defined(WORDS_BIGENDIAN)
+#define MERGE_2INTS(a,b,sz) (((uint64_t)(a)<<sz)|(b))
+#else
+#define MERGE_2INTS(a,b,sz) (((uint64_t)(b)<<sz)|(a))
+#endif
+
+static uint16_t
+get_uint16(const uint8_t *p)
+{
+    return (uint16_t)MERGE_2INTS(p[0],p[1],8);
+}
+
+static uint32_t
+get_uint32(const uint8_t *p)
+{
+    return (uint32_t)MERGE_2INTS(get_uint16(p),get_uint16(p+2),16);
+}
+
+static uint64_t
+get_uint64(const uint8_t *p)
+{
+    return MERGE_2INTS(get_uint32(p),get_uint32(p+4),32);
+}
+
+static uint8_t
+read_uint8(const char **ptr)
+{
+    const char *p = *ptr;
+    *ptr = (p + 1);
+    return (uint8_t)*p;
+}
+
+static uint16_t
+read_uint16(const char **ptr)
+{
+    const char *p = *ptr;
+    *ptr = (p + 2);
+    return get_uint16((const uint8_t *)p);
+}
+
+static uint32_t
+read_uint24(const char **ptr)
+{
+    const char *p = *ptr;
+    *ptr = (p + 3);
+    return ((uint8_t)*p << 16) | get_uint16((const uint8_t *)p+1);
+}
+
+static uint32_t
+read_uint32(const char **ptr)
+{
+    const char *p = *ptr;
+    *ptr = (p + 4);
+    return get_uint32((const uint8_t *)p);
+}
+
+static uint64_t
+read_uint64(const char **ptr)
+{
+    const unsigned char *p = (const unsigned char *)*ptr;
+    *ptr = (char *)(p + 8);
+    return get_uint64(p);
+}
+
+static uintptr_t
+read_uintptr(const char **ptr)
+{
+    const unsigned char *p = (const unsigned char *)*ptr;
+    *ptr = (char *)(p + SIZEOF_VOIDP);
+#if SIZEOF_VOIDP == 8
+    return get_uint64(p);
+#else
+    return get_uint32(p);
+#endif
+}
+
+static uint64_t
+read_uint(DebugInfoReader *reader)
+{
+    if (reader->format == 4) {
+        return read_uint32(&reader->p);
+    } else { /* 64 bit */
+        return read_uint64(&reader->p);
+    }
+}
+
+static uint64_t
+read_uleb128(DebugInfoReader *reader)
+{
+    return uleb128(&reader->p);
+}
+
+static int64_t
+read_sleb128(DebugInfoReader *reader)
+{
+    return sleb128(&reader->p);
+}
+
+static void
+debug_info_reader_init(DebugInfoReader *reader, obj_info_t *obj)
+{
+    reader->file = obj->mapped;
+    reader->obj = obj;
+    reader->p = obj->debug_info.ptr;
+    reader->pend = obj->debug_info.ptr + obj->debug_info.size;
+    reader->debug_line_cu_end = obj->debug_line.ptr;
+    reader->current_low_pc = 0;
+    reader->current_str_offsets_base = 0;
+    reader->current_addr_base = 0;
+    reader->current_rnglists_base = 0;
+}
+
+static void
+di_skip_die_attributes(const char **p)
+{
+    for (;;) {
+        uint64_t at = uleb128(p);
+        uint64_t form = uleb128(p);
+        if (!at && !form) break;
+        switch (form) {
+          default:
+            break;
+          case DW_FORM_implicit_const:
+            sleb128(p);
+            break;
+        }
+    }
+}
+
+static void
+di_read_debug_abbrev_cu(DebugInfoReader *reader)
+{
+    uint64_t prev = 0;
+    const char *p = reader->q0;
+    for (;;) {
+        uint64_t abbrev_number = uleb128(&p);
+        if (abbrev_number <= prev) break;
+        if (abbrev_number < ABBREV_TABLE_SIZE) {
+            reader->abbrev_table[abbrev_number] = p;
+        }
+        prev = abbrev_number;
+        uleb128(&p); /* tag */
+        p++; /* has_children */
+        di_skip_die_attributes(&p);
+    }
+}
+
+static int
+di_read_debug_line_cu(DebugInfoReader *reader, FILE *errout)
+{
+    const char *p;
+    struct LineNumberProgramHeader header;
+
+    p = (const char *)reader->debug_line_cu_end;
+    if (parse_debug_line_header(reader->obj, &p, &header, errout))
+        return -1;
+
+    reader->debug_line_cu_end = (char *)header.cu_end;
+    reader->debug_line_format = header.format;
+    reader->debug_line_version = header.version;
+    reader->debug_line_directories = (char *)header.include_directories;
+    reader->debug_line_files = (char *)header.filenames;
+
+    return 0;
+}
+
+static void
+set_addr_idx_value(DebugInfoValue *v, uint64_t n)
+{
+    v->as.addr_idx = n;
+    v->type = VAL_addr;
+}
+
+static void
+set_uint_value(DebugInfoValue *v, uint64_t n)
+{
+    v->as.uint64 = n;
+    v->type = VAL_uint;
+}
+
+static void
+set_int_value(DebugInfoValue *v, int64_t n)
+{
+    v->as.int64 = n;
+    v->type = VAL_int;
+}
+
+static void
+set_cstr_value(DebugInfoValue *v, const char *s)
+{
+    v->as.ptr = s;
+    v->off = 0;
+    v->type = VAL_cstr;
+}
+
+static void
+set_cstrp_value(DebugInfoValue *v, const char *s, uint64_t off)
+{
+    v->as.ptr = s;
+    v->off = off;
+    v->type = VAL_cstr;
+}
+
+static void
+set_data_value(DebugInfoValue *v, const char *s)
+{
+    v->as.ptr = s;
+    v->type = VAL_data;
+}
+
+static const char *
+get_cstr_value(DebugInfoValue *v)
+{
+    if (v->as.ptr) {
+        return v->as.ptr + v->off;
+    } else {
+        return NULL;
+    }
+}
+
+static const char *
+resolve_strx(DebugInfoReader *reader, uint64_t idx)
+{
+    const char *p = reader->obj->debug_str_offsets.ptr + reader->current_str_offsets_base;
+    uint64_t off;
+    if (reader->format == 4) {
+        off = ((uint32_t *)p)[idx];
+    }
+    else {
+        off = ((uint64_t *)p)[idx];
+    }
+    return reader->obj->debug_str.ptr + off;
+}
+
+static bool
+debug_info_reader_read_addr_value_member(DebugInfoReader *reader, DebugInfoValue *v, int size)
+{
+    if (size == 4) {
+        set_uint_value(v, read_uint32(&reader->p));
+    } else if (size == 8) {
+        set_uint_value(v, read_uint64(&reader->p));
+    } else {
+        return false;
+    }
+    return true;
+}
+
+#define debug_info_reader_read_addr_value(reader, v, mem) \
+    if (!debug_info_reader_read_addr_value_member((reader), (v), (reader)->mem)) { \
+        kprintf("unknown " #mem ":%d", (reader)->mem); \
+        return false; \
+    }
+
+
+static bool
+debug_info_reader_read_value(DebugInfoReader *reader, uint64_t form, DebugInfoValue *v, FILE *errout)
+{
+    switch (form) {
+      case DW_FORM_addr:
+        debug_info_reader_read_addr_value(reader, v, address_size);
+        break;
+      case DW_FORM_block2:
+        v->size = read_uint16(&reader->p);
+        set_data_value(v, reader->p);
+        reader->p += v->size;
+        break;
+      case DW_FORM_block4:
+        v->size = read_uint32(&reader->p);
+        set_data_value(v, reader->p);
+        reader->p += v->size;
+        break;
+      case DW_FORM_data2:
+        set_uint_value(v, read_uint16(&reader->p));
+        break;
+      case DW_FORM_data4:
+        set_uint_value(v, read_uint32(&reader->p));
+        break;
+      case DW_FORM_data8:
+        set_uint_value(v, read_uint64(&reader->p));
+        break;
+      case DW_FORM_string:
+        v->size = strlen(reader->p);
+        set_cstr_value(v, reader->p);
+        reader->p += v->size + 1;
+        break;
+      case DW_FORM_block:
+        v->size = uleb128(&reader->p);
+        set_data_value(v, reader->p);
+        reader->p += v->size;
+        break;
+      case DW_FORM_block1:
+        v->size = read_uint8(&reader->p);
+        set_data_value(v, reader->p);
+        reader->p += v->size;
+        break;
+      case DW_FORM_data1:
+        set_uint_value(v, read_uint8(&reader->p));
+        break;
+      case DW_FORM_flag:
+        set_uint_value(v, read_uint8(&reader->p));
+        break;
+      case DW_FORM_sdata:
+        set_int_value(v, read_sleb128(reader));
+        break;
+      case DW_FORM_strp:
+        set_cstrp_value(v, reader->obj->debug_str.ptr, read_uint(reader));
+        break;
+      case DW_FORM_udata:
+        set_uint_value(v, read_uleb128(reader));
+        break;
+      case DW_FORM_ref_addr:
+        if (reader->current_version <= 2) {
+            // DWARF Version 2 specifies that references have
+            // the same size as an address on the target system
+            debug_info_reader_read_addr_value(reader, v, address_size);
+        } else {
+            debug_info_reader_read_addr_value(reader, v, format);
+        }
+        break;
+      case DW_FORM_ref1:
+        set_uint_value(v, read_uint8(&reader->p));
+        break;
+      case DW_FORM_ref2:
+        set_uint_value(v, read_uint16(&reader->p));
+        break;
+      case DW_FORM_ref4:
+        set_uint_value(v, read_uint32(&reader->p));
+        break;
+      case DW_FORM_ref8:
+        set_uint_value(v, read_uint64(&reader->p));
+        break;
+      case DW_FORM_ref_udata:
+        set_uint_value(v, uleb128(&reader->p));
+        break;
+      case DW_FORM_indirect:
+        /* TODO: read the referred value */
+        set_uint_value(v, uleb128(&reader->p));
+        break;
+      case DW_FORM_sec_offset:
+        set_uint_value(v, read_uint(reader)); /* offset */
+        /* addrptr: debug_addr */
+        /* lineptr: debug_line */
+        /* loclist: debug_loclists */
+        /* loclistptr: debug_loclists */
+        /* macptr: debug_macro */
+        /* rnglist: debug_rnglists */
+        /* rnglistptr: debug_rnglists */
+        /* stroffsetsptr: debug_str_offsets */
+        break;
+      case DW_FORM_exprloc:
+        v->size = (size_t)read_uleb128(reader);
+        set_data_value(v, reader->p);
+        reader->p += v->size;
+        break;
+      case DW_FORM_flag_present:
+        set_uint_value(v, 1);
+        break;
+      case DW_FORM_strx:
+        set_cstr_value(v, resolve_strx(reader, uleb128(&reader->p)));
+        break;
+      case DW_FORM_addrx:
+        set_addr_idx_value(v, uleb128(&reader->p));
+        break;
+      case DW_FORM_ref_sup4:
+        set_uint_value(v, read_uint32(&reader->p));
+        break;
+      case DW_FORM_strp_sup:
+        set_uint_value(v, read_uint(reader));
+        /* *p = reader->sup_file + reader->sup_str->sh_offset + ret; */
+        break;
+      case DW_FORM_data16:
+        v->size = 16;
+        set_data_value(v, reader->p);
+        reader->p += v->size;
+        break;
+      case DW_FORM_line_strp:
+        set_cstrp_value(v, reader->obj->debug_line_str.ptr, read_uint(reader));
+        break;
+      case DW_FORM_ref_sig8:
+        set_uint_value(v, read_uint64(&reader->p));
+        break;
+      case DW_FORM_implicit_const:
+        set_int_value(v, sleb128(&reader->q));
+        break;
+      case DW_FORM_loclistx:
+        set_uint_value(v, read_uleb128(reader));
+        break;
+      case DW_FORM_rnglistx:
+        set_uint_value(v, read_uleb128(reader));
+        break;
+      case DW_FORM_ref_sup8:
+        set_uint_value(v, read_uint64(&reader->p));
+        break;
+      case DW_FORM_strx1:
+        set_cstr_value(v, resolve_strx(reader, read_uint8(&reader->p)));
+        break;
+      case DW_FORM_strx2:
+        set_cstr_value(v, resolve_strx(reader, read_uint16(&reader->p)));
+        break;
+      case DW_FORM_strx3:
+        set_cstr_value(v, resolve_strx(reader, read_uint24(&reader->p)));
+        break;
+      case DW_FORM_strx4:
+        set_cstr_value(v, resolve_strx(reader, read_uint32(&reader->p)));
+        break;
+      case DW_FORM_addrx1:
+        set_addr_idx_value(v, read_uint8(&reader->p));
+        break;
+      case DW_FORM_addrx2:
+        set_addr_idx_value(v, read_uint16(&reader->p));
+        break;
+      case DW_FORM_addrx3:
+        set_addr_idx_value(v, read_uint24(&reader->p));
+        break;
+      case DW_FORM_addrx4:
+        set_addr_idx_value(v, read_uint32(&reader->p));
+        break;
+      /* we have no support for actually reading the real values of these refs out
+       * of the .gnu_debugaltlink dwz-compressed debuginfo at the moment, but "read"
+       * them anyway so that we advance the reader by the right amount. */
+      case DW_FORM_GNU_ref_alt:
+      case DW_FORM_GNU_strp_alt:
+        read_uint(reader);
+        set_uint_value(v, 0);
+        break;
+      case 0:
+        goto fail;
+        break;
+    }
+    return true;
+
+  fail:
+    kprintf("%d: unsupported form: %#"PRIx64"\n", __LINE__, form);
+    return false;
+}
+
+/* find abbrev in current compilation unit */
+static const char *
+di_find_abbrev(DebugInfoReader *reader, uint64_t abbrev_number, FILE *errout)
+{
+    const char *p;
+    if (abbrev_number < ABBREV_TABLE_SIZE) {
+        return reader->abbrev_table[abbrev_number];
+    }
+    p = reader->abbrev_table[ABBREV_TABLE_SIZE-1];
+    /* skip 255th record */
+    uleb128(&p); /* tag */
+    p++; /* has_children */
+    di_skip_die_attributes(&p);
+    for (uint64_t n = uleb128(&p); abbrev_number != n; n = uleb128(&p)) {
+        if (n == 0) {
+            kprintf("%d: Abbrev Number %"PRId64" not found\n",__LINE__, abbrev_number);
+            return NULL;
+        }
+        uleb128(&p); /* tag */
+        p++; /* has_children */
+        di_skip_die_attributes(&p);
+    }
+    return p;
+}
+
+#if 0
+static void
+hexdump0(const unsigned char *p, size_t n, FILE *errout)
+{
+    size_t i;
+    kprintf("     0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F\n");
+    for (i=0; i < n; i++){
+        switch (i & 15) {
+          case 0:
+            kprintf("%02" PRIdSIZE ": %02X ", i/16, p[i]);
+            break;
+          case 15:
+            kprintf("%02X\n", p[i]);
+            break;
+          default:
+            kprintf("%02X ", p[i]);
+            break;
+        }
+    }
+    if ((i & 15) != 15) {
+        kprintf("\n");
+    }
+}
+#define hexdump(p,n,e) hexdump0((const unsigned char *)p, n, e)
+
+static void
+div_inspect(DebugInfoValue *v, FILE *errout)
+{
+    switch (v->type) {
+      case VAL_uint:
+        kprintf("%d: type:%d size:%" PRIxSIZE " v:%"PRIx64"\n",__LINE__,v->type,v->size,v->as.uint64);
+        break;
+      case VAL_int:
+        kprintf("%d: type:%d size:%" PRIxSIZE " v:%"PRId64"\n",__LINE__,v->type,v->size,(int64_t)v->as.uint64);
+        break;
+      case VAL_cstr:
+        kprintf("%d: type:%d size:%" PRIxSIZE " v:'%s'\n",__LINE__,v->type,v->size,v->as.ptr);
+        break;
+      case VAL_data:
+        kprintf("%d: type:%d size:%" PRIxSIZE " v:\n",__LINE__,v->type,v->size);
+        hexdump(v->as.ptr, 16, errout);
+        break;
+    }
+}
+#endif
+
+static DIE *
+di_read_die(DebugInfoReader *reader, DIE *die, FILE *errout)
+{
+    uint64_t abbrev_number = uleb128(&reader->p);
+    if (abbrev_number == 0) {
+        reader->level--;
+        return NULL;
+    }
+
+    if (!(reader->q = di_find_abbrev(reader, abbrev_number, errout))) return NULL;
+
+    die->pos = reader->p - reader->obj->debug_info.ptr - 1;
+    die->tag = (int)uleb128(&reader->q); /* tag */
+    die->has_children = *reader->q++; /* has_children */
+    if (die->has_children) {
+        reader->level++;
+    }
+    return die;
+}
+
+static DebugInfoValue *
+di_read_record(DebugInfoReader *reader, DebugInfoValue *vp, FILE *errout)
+{
+    uint64_t at = uleb128(&reader->q);
+    uint64_t form = uleb128(&reader->q);
+    if (!at || !form) return NULL;
+    vp->at = at;
+    vp->form = form;
+    if (!debug_info_reader_read_value(reader, form, vp, errout)) return NULL;
+    return vp;
+}
+
+static bool
+di_skip_records(DebugInfoReader *reader, FILE *errout)
+{
+    for (;;) {
+        DebugInfoValue v = {{0}};
+        uint64_t at = uleb128(&reader->q);
+        uint64_t form = uleb128(&reader->q);
+        if (!at || !form) return true;
+        if (!debug_info_reader_read_value(reader, form, &v, errout)) return false;
+    }
+}
+
+typedef struct addr_header {
+    const char *ptr;
+    uint64_t unit_length;
+    uint8_t format;
+    uint8_t address_size;
+    /* uint8_t segment_selector_size; */
+} addr_header_t;
+
+static bool
+addr_header_init(obj_info_t *obj, addr_header_t *header, FILE *errout)
+{
+    const char *p = obj->debug_addr.ptr;
+
+    header->ptr = p;
+
+    if (!p) return true;
+
+    header->unit_length = *(uint32_t *)p;
+    p += sizeof(uint32_t);
+
+    header->format = 4;
+    if (header->unit_length == 0xffffffff) {
+        header->unit_length = *(uint64_t *)p;
+        p += sizeof(uint64_t);
+        header->format = 8;
+    }
+
+    p += 2; /* version */
+    header->address_size = *p++;
+    if (header->address_size != 4 && header->address_size != 8) {
+        kprintf("unknown address_size:%d", header->address_size);
+        return false;
+    }
+    p++; /* segment_selector_size */
+    return true;
+}
+
+static uint64_t
+read_addr(addr_header_t *header, uint64_t addr_base, uint64_t idx) {
+    if (header->address_size == 4) {
+        return ((uint32_t*)(header->ptr + addr_base))[idx];
+    }
+    else {
+        return ((uint64_t*)(header->ptr + addr_base))[idx];
+    }
+}
+
+typedef struct rnglists_header {
+    uint64_t unit_length;
+    uint8_t format;
+    uint8_t address_size;
+    uint32_t offset_entry_count;
+} rnglists_header_t;
+
+static bool
+rnglists_header_init(obj_info_t *obj, rnglists_header_t *header, FILE *errout)
+{
+    const char *p = obj->debug_rnglists.ptr;
+
+    if (!p) return true;
+
+    header->unit_length = *(uint32_t *)p;
+    p += sizeof(uint32_t);
+
+    header->format = 4;
+    if (header->unit_length == 0xffffffff) {
+        header->unit_length = *(uint64_t *)p;
+        p += sizeof(uint64_t);
+        header->format = 8;
+    }
+
+    p += 2; /* version */
+    header->address_size = *p++;
+    if (header->address_size != 4 && header->address_size != 8) {
+        kprintf("unknown address_size:%d", header->address_size);
+        return false;
+    }
+    p++; /* segment_selector_size */
+    header->offset_entry_count = *(uint32_t *)p;
+    return true;
+}
+
+typedef struct {
+    uint64_t low_pc;
+    uint64_t high_pc;
+    uint64_t ranges;
+    bool low_pc_set;
+    bool high_pc_set;
+    bool ranges_set;
+} ranges_t;
+
+static void
+ranges_set(ranges_t *ptr, DebugInfoValue *v, addr_header_t *addr_header, uint64_t addr_base)
+{
+    uint64_t n = 0;
+    if (v->type == VAL_uint) {
+        n = v->as.uint64;
+    }
+    else if (v->type == VAL_addr) {
+        n = read_addr(addr_header, addr_base, v->as.addr_idx);
+    }
+    switch (v->at) {
+      case DW_AT_low_pc:
+        ptr->low_pc = n;
+        ptr->low_pc_set = true;
+        break;
+      case DW_AT_high_pc:
+        if (v->form == DW_FORM_addr) {
+            ptr->high_pc = n;
+        }
+        else {
+            ptr->high_pc = ptr->low_pc + n;
+        }
+        ptr->high_pc_set = true;
+        break;
+      case DW_AT_ranges:
+        ptr->ranges = n;
+        ptr->ranges_set = true;
+        break;
+    }
+}
+
+static uint64_t
+read_dw_form_addr(DebugInfoReader *reader, const char **ptr, FILE *errout)
+{
+    const char *p = *ptr;
+    *ptr = p + reader->address_size;
+    if (reader->address_size == 4) {
+        return read_uint32(&p);
+    } else {
+        return read_uint64(&p);
+    }
+}
+
+static uintptr_t
+ranges_include(DebugInfoReader *reader, ranges_t *ptr, uint64_t addr, rnglists_header_t *rnglists_header, FILE *errout)
+{
+    if (ptr->high_pc_set) {
+        if (ptr->ranges_set || !ptr->low_pc_set) {
+            return UINTPTR_MAX;
+        }
+        if (ptr->low_pc <= addr && addr <= ptr->high_pc) {
+            return (uintptr_t)ptr->low_pc;
+        }
+    }
+    else if (ptr->ranges_set) {
+        /* TODO: support base address selection entry */
+        const char *p;
+        uint64_t base = ptr->low_pc_set ? ptr->low_pc : reader->current_low_pc;
+        bool base_valid = true;
+        if (reader->current_version >= 5) {
+            if (rnglists_header->offset_entry_count == 0) {
+                // DW_FORM_sec_offset
+                p = reader->obj->debug_rnglists.ptr + ptr->ranges + reader->current_rnglists_base;
+            }
+            else {
+                // DW_FORM_rnglistx
+                const char *offset_array = reader->obj->debug_rnglists.ptr + reader->current_rnglists_base;
+                if (rnglists_header->format == 4) {
+                    p = offset_array + ((uint32_t *)offset_array)[ptr->ranges];
+                }
+                else {
+                    p = offset_array + ((uint64_t *)offset_array)[ptr->ranges];
+                }
+            }
+            for (;;) {
+                uint8_t rle = read_uint8(&p);
+                uintptr_t from = 0, to = 0;
+                if (rle == DW_RLE_end_of_list) break;
+                switch (rle) {
+                  case DW_RLE_base_addressx:
+                    uleb128(&p);
+                    base_valid = false; /* not supported yet */
+                    break;
+                  case DW_RLE_startx_endx:
+                    uleb128(&p);
+                    uleb128(&p);
+                    break;
+                  case DW_RLE_startx_length:
+                    uleb128(&p);
+                    uleb128(&p);
+                    break;
+                  case DW_RLE_offset_pair:
+                    if (!base_valid) break;
+                    from = (uintptr_t)base + uleb128(&p);
+                    to = (uintptr_t)base + uleb128(&p);
+                    break;
+                  case DW_RLE_base_address:
+                    base = read_dw_form_addr(reader, &p, errout);
+                    base_valid = true;
+                    break;
+                  case DW_RLE_start_end:
+                    from = (uintptr_t)read_dw_form_addr(reader, &p, errout);
+                    to = (uintptr_t)read_dw_form_addr(reader, &p, errout);
+                    break;
+                  case DW_RLE_start_length:
+                    from = (uintptr_t)read_dw_form_addr(reader, &p, errout);
+                    to = from + uleb128(&p);
+                    break;
+                }
+                if (from <= addr && addr < to) {
+                    return from;
+                }
+            }
+            return 0;
+        }
+        p = reader->obj->debug_ranges.ptr + ptr->ranges;
+        for (;;) {
+            uintptr_t from = read_uintptr(&p);
+            uintptr_t to = read_uintptr(&p);
+            if (!from && !to) break;
+            if (from == UINTPTR_MAX) {
+                /* base address selection entry */
+                base = to;
+            }
+            else if (base + from <= addr && addr < base + to) {
+                return (uintptr_t)base + from;
+            }
+        }
+    }
+    else if (ptr->low_pc_set) {
+        if (ptr->low_pc == addr) {
+            return (uintptr_t)ptr->low_pc;
+        }
+    }
+    return 0;
+}
+
+#if 0
+static void
+ranges_inspect(DebugInfoReader *reader, ranges_t *ptr, FILE *errout)
+{
+    if (ptr->high_pc_set) {
+        if (ptr->ranges_set || !ptr->low_pc_set) {
+            kprintf("low_pc_set:%d high_pc_set:%d ranges_set:%d\n",ptr->low_pc_set,ptr->high_pc_set,ptr->ranges_set);
+            return;
+        }
+        kprintf("low_pc:%"PRIx64" high_pc:%"PRIx64"\n",ptr->low_pc,ptr->high_pc);
+    }
+    else if (ptr->ranges_set) {
+        char *p = reader->obj->debug_ranges.ptr + ptr->ranges;
+        kprintf("low_pc:%"PRIx64" ranges:%"PRIx64" %lx ",ptr->low_pc,ptr->ranges, p-reader->obj->mapped);
+        for (;;) {
+            uintptr_t from = read_uintptr(&p);
+            uintptr_t to = read_uintptr(&p);
+            if (!from && !to) break;
+            kprintf("%"PRIx64"-%"PRIx64" ",ptr->low_pc+from,ptr->low_pc+to);
+        }
+        kprintf("\n");
+    }
+    else if (ptr->low_pc_set) {
+        kprintf("low_pc:%"PRIx64"\n",ptr->low_pc);
+    }
+    else {
+        kprintf("empty\n");
+    }
+}
+#endif
+
+static int
+di_read_cu(DebugInfoReader *reader, FILE *errout)
+{
+    uint64_t unit_length;
+    uint16_t version;
+    uint64_t debug_abbrev_offset;
+    reader->format = 4;
+    reader->current_cu = reader->p;
+    unit_length = read_uint32(&reader->p);
+    if (unit_length == 0xffffffff) {
+        unit_length = read_uint64(&reader->p);
+        reader->format = 8;
+    }
+    reader->cu_end = reader->p + unit_length;
+    version = read_uint16(&reader->p);
+    reader->current_version = version;
+    if (version > 5) {
+        return -1;
+    }
+    else if (version == 5) {
+        /* unit_type = */ read_uint8(&reader->p);
+        reader->address_size = read_uint8(&reader->p);
+        debug_abbrev_offset = read_uint(reader);
+    }
+    else {
+        debug_abbrev_offset = read_uint(reader);
+        reader->address_size = read_uint8(&reader->p);
+    }
+    if (reader->address_size != 4 && reader->address_size != 8) {
+        kprintf("unknown address_size:%d", reader->address_size);
+        return -1;
+    }
+    reader->q0 = reader->obj->debug_abbrev.ptr + debug_abbrev_offset;
+
+    reader->level = 0;
+    di_read_debug_abbrev_cu(reader);
+    if (di_read_debug_line_cu(reader, errout)) return -1;
+
+    do {
+        DIE die;
+
+        if (!di_read_die(reader, &die, errout)) continue;
+
+        if (die.tag != DW_TAG_compile_unit) {
+            if (!di_skip_records(reader, errout)) return -1;
+            break;
+        }
+
+        reader->current_str_offsets_base = 0;
+        reader->current_addr_base = 0;
+        reader->current_rnglists_base = 0;
+
+        DebugInfoValue low_pc = {{0}};
+        /* enumerate abbrev */
+        for (;;) {
+            DebugInfoValue v = {{0}};
+            if (!di_read_record(reader, &v, errout)) break;
+            switch (v.at) {
+              case DW_AT_low_pc:
+                // clang may output DW_AT_addr_base after DW_AT_low_pc.
+                // We need to resolve the DW_FORM_addr* after DW_AT_addr_base is parsed.
+                low_pc = v;
+                break;
+              case DW_AT_str_offsets_base:
+                reader->current_str_offsets_base = v.as.uint64;
+                break;
+              case DW_AT_addr_base:
+                reader->current_addr_base = v.as.uint64;
+                break;
+              case DW_AT_rnglists_base:
+                reader->current_rnglists_base = v.as.uint64;
+                break;
+            }
+        }
+        // Resolve the DW_FORM_addr of DW_AT_low_pc
+        switch (low_pc.type) {
+            case VAL_uint:
+                reader->current_low_pc = low_pc.as.uint64;
+                break;
+            case VAL_addr:
+                {
+                    addr_header_t header = {0};
+                    if (!addr_header_init(reader->obj, &header, errout)) return -1;
+                    reader->current_low_pc = read_addr(&header, reader->current_addr_base, low_pc.as.addr_idx);
+                }
+                break;
+        }
+    } while (0);
+
+    return 0;
+}
+
+static void
+read_abstract_origin(DebugInfoReader *reader, uint64_t form, uint64_t abstract_origin, line_info_t *line, FILE *errout)
+{
+    const char *p = reader->p;
+    const char *q = reader->q;
+    int level = reader->level;
+    DIE die;
+
+    switch (form) {
+      case DW_FORM_ref1:
+      case DW_FORM_ref2:
+      case DW_FORM_ref4:
+      case DW_FORM_ref8:
+      case DW_FORM_ref_udata:
+        reader->p = reader->current_cu + abstract_origin;
+        break;
+      case DW_FORM_ref_addr:
+        goto finish; /* not supported yet */
+      case DW_FORM_ref_sig8:
+        goto finish; /* not supported yet */
+      case DW_FORM_ref_sup4:
+      case DW_FORM_ref_sup8:
+        goto finish; /* not supported yet */
+      default:
+        goto finish;
+    }
+    if (!di_read_die(reader, &die, errout)) goto finish;
+
+    /* enumerate abbrev */
+    for (;;) {
+        DebugInfoValue v = {{0}};
+        if (!di_read_record(reader, &v, errout)) break;
+        switch (v.at) {
+          case DW_AT_name:
+            line->sname = get_cstr_value(&v);
+            break;
+        }
+    }
+
+  finish:
+    reader->p = p;
+    reader->q = q;
+    reader->level = level;
+}
+
+static bool
+debug_info_read(DebugInfoReader *reader, int num_traces, void **traces,
+                line_info_t *lines, int offset, FILE *errout)
+{
+
+    addr_header_t addr_header = {0};
+    if (!addr_header_init(reader->obj, &addr_header, errout)) return false;
+
+    rnglists_header_t rnglists_header = {0};
+    if (!rnglists_header_init(reader->obj, &rnglists_header, errout)) return false;
+
+    while (reader->p < reader->cu_end) {
+        DIE die;
+        ranges_t ranges = {0};
+        line_info_t line = {0};
+
+        if (!di_read_die(reader, &die, errout)) continue;
+        /* kprintf("%d:%tx: <%d>\n",__LINE__,die.pos,reader->level,die.tag); */
+
+        if (die.tag != DW_TAG_subprogram && die.tag != DW_TAG_inlined_subroutine) {
+          skip_die:
+            if (!di_skip_records(reader, errout)) return false;
+            continue;
+        }
+
+        /* enumerate abbrev */
+        for (;;) {
+            DebugInfoValue v = {{0}};
+            /* ptrdiff_t pos = reader->p - reader->p0; */
+            if (!di_read_record(reader, &v, errout)) break;
+            /* kprintf("\n%d:%tx: AT:%lx FORM:%lx\n",__LINE__,pos,v.at,v.form); */
+            /* div_inspect(&v, errout); */
+            switch (v.at) {
+              case DW_AT_name:
+                line.sname = get_cstr_value(&v);
+                break;
+              case DW_AT_call_file:
+                fill_filename((int)v.as.uint64, reader->debug_line_format, reader->debug_line_version, reader->debug_line_directories, reader->debug_line_files, &line, reader->obj, errout);
+                break;
+              case DW_AT_call_line:
+                line.line = (int)v.as.uint64;
+                break;
+              case DW_AT_low_pc:
+              case DW_AT_high_pc:
+              case DW_AT_ranges:
+                ranges_set(&ranges, &v, &addr_header, reader->current_addr_base);
+                break;
+              case DW_AT_declaration:
+                goto skip_die;
+              case DW_AT_inline:
+                /* 1 or 3 */
+                break; /* goto skip_die; */
+              case DW_AT_abstract_origin:
+                read_abstract_origin(reader, v.form, v.as.uint64, &line, errout);
+                break; /* goto skip_die; */
+            }
+        }
+        /* ranges_inspect(reader, &ranges, errout); */
+        /* kprintf("%d:%tx: %x ",__LINE__,diepos,die.tag); */
+        for (int i=offset; i < num_traces; i++) {
+            uintptr_t addr = (uintptr_t)traces[i];
+            uintptr_t offset = addr - reader->obj->base_addr + reader->obj->vmaddr;
+            uintptr_t saddr = ranges_include(reader, &ranges, offset, &rnglists_header, errout);
+            if (saddr == UINTPTR_MAX) return false;
+            if (saddr) {
+                /* kprintf("%d:%tx: %d %lx->%lx %x %s: %s/%s %d %s %s %s\n",__LINE__,die.pos, i,addr,offset, die.tag,line.sname,line.dirname,line.filename,line.line,reader->obj->path,line.sname,lines[i].sname); */
+                if (lines[i].sname) {
+                    line_info_t *lp = malloc(sizeof(line_info_t));
+                    memcpy(lp, &lines[i], sizeof(line_info_t));
+                    lines[i].next = lp;
+                    lp->dirname = line.dirname;
+                    lp->filename = line.filename;
+                    lp->line = line.line;
+                    lp->saddr = 0;
+                }
+                lines[i].path = reader->obj->path;
+                lines[i].base_addr = line.base_addr;
+                lines[i].sname = line.sname;
+                lines[i].saddr = saddr + reader->obj->base_addr - reader->obj->vmaddr;
+            }
+        }
+    }
+    return true;
+}
+
+// This function parses the following attributes of Line Number Program Header in DWARF 5:
+//
+// * directory_entry_format_count
+// * directory_entry_format
+// * directories_count
+// * directories
+//
+// or
+//
+// * file_name_entry_format_count
+// * file_name_entry_format
+// * file_names_count
+// * file_names
+//
+// It records DW_LNCT_path and DW_LNCT_directory_index at the index "idx".
+static const char *
+parse_ver5_debug_line_header(const char *p, int idx, uint8_t format,
+                             obj_info_t *obj, const char **out_path,
+                             uint64_t *out_directory_index, FILE *errout)
+{
+    int i, j;
+    int entry_format_count = *(uint8_t *)p++;
+    const char *entry_format = p;
+
+    /* skip the part of entry_format */
+    for (i = 0; i < entry_format_count * 2; i++) uleb128(&p);
+
+    int entry_count = (int)uleb128(&p);
+
+    DebugInfoReader reader = {0};
+    debug_info_reader_init(&reader, obj);
+    reader.format = format;
+    reader.p = p;
+    for (j = 0; j < entry_count; j++) {
+        const char *format = entry_format;
+        for (i = 0; i < entry_format_count; i++) {
+            DebugInfoValue v = {{0}};
+            unsigned long dw_lnct = uleb128(&format);
+            unsigned long dw_form = uleb128(&format);
+            if (!debug_info_reader_read_value(&reader, dw_form, &v, errout)) return 0;
+            if (dw_lnct == 1 /* DW_LNCT_path */ && v.type == VAL_cstr && out_path)
+                *out_path = v.as.ptr + v.off;
+            if (dw_lnct == 2 /* DW_LNCT_directory_index */ && v.type == VAL_uint && out_directory_index)
+                *out_directory_index = v.as.uint64;
+        }
+        if (j == idx) return 0;
+    }
+
+    return reader.p;
+}
+
+#ifdef USE_ELF
+static unsigned long
+uncompress_debug_section(ElfW(Shdr) *shdr, char *file, char **ptr)
+{
+    *ptr = NULL;
+#ifdef SUPPORT_COMPRESSED_DEBUG_LINE
+    ElfW(Chdr) *chdr = (ElfW(Chdr) *)(file + shdr->sh_offset);
+    unsigned long destsize = chdr->ch_size;
+    int ret = 0;
+
+    if (chdr->ch_type != ELFCOMPRESS_ZLIB) {
+        /* unsupported compression type */
+        return 0;
+    }
+
+    *ptr = malloc(destsize);
+    if (!*ptr) return 0;
+    ret = uncompress((Bytef *)*ptr, &destsize,
+            (const Bytef*)chdr + sizeof(ElfW(Chdr)),
+            shdr->sh_size - sizeof(ElfW(Chdr)));
+    if (ret != Z_OK) goto fail;
+    return destsize;
+
+fail:
+    free(*ptr);
+    *ptr = NULL;
+#endif
+    return 0;
 }
 
 /* read file and fill lines */
 static uintptr_t
 fill_lines(int num_traces, void **traces, int check_debuglink,
-	   obj_info_t **objp, line_info_t *lines, int offset)
+           obj_info_t **objp, line_info_t *lines, int offset, FILE *errout)
 {
     int i, j;
     char *shstr;
-    char *section_name;
     ElfW(Ehdr) *ehdr;
     ElfW(Shdr) *shdr, *shstr_shdr;
-    ElfW(Shdr) *debug_line_shdr = NULL, *gnu_debuglink_shdr = NULL;
+    ElfW(Shdr) *gnu_debuglink_shdr = NULL;
+    ElfW(Shdr) *note_gnu_build_id = NULL;
     int fd;
     off_t filesize;
     char *file;
@@ -479,43 +2072,41 @@ fill_lines(int num_traces, void **traces, int check_debuglink,
 
     fd = open(binary_filename, O_RDONLY);
     if (fd < 0) {
-	goto fail;
+        goto fail;
     }
     filesize = lseek(fd, 0, SEEK_END);
     if (filesize < 0) {
-	int e = errno;
-	close(fd);
-	kprintf("lseek: %s\n", strerror(e));
-	goto fail;
+        int e = errno;
+        close(fd);
+        kprintf("lseek: %s\n", strerror(e));
+        goto fail;
     }
 #if SIZEOF_OFF_T > SIZEOF_SIZE_T
     if (filesize > (off_t)SIZE_MAX) {
-	close(fd);
-	kprintf("Too large file %s\n", binary_filename);
-	goto fail;
+        close(fd);
+        kprintf("Too large file %s\n", binary_filename);
+        goto fail;
     }
 #endif
     lseek(fd, 0, SEEK_SET);
     /* async-signal unsafe */
     file = (char *)mmap(NULL, (size_t)filesize, PROT_READ, MAP_SHARED, fd, 0);
     if (file == MAP_FAILED) {
-	int e = errno;
-	close(fd);
-	kprintf("mmap: %s\n", strerror(e));
-	goto fail;
+        int e = errno;
+        close(fd);
+        kprintf("mmap: %s\n", strerror(e));
+        goto fail;
     }
+    close(fd);
 
     ehdr = (ElfW(Ehdr) *)file;
     if (memcmp(ehdr->e_ident, "\177ELF", 4) != 0) {
-	/*
-	 * Huh? Maybe filename was overridden by setproctitle() and
-	 * it match non-elf file.
-	 */
-	close(fd);
-	goto fail;
+        /*
+         * Huh? Maybe filename was overridden by setproctitle() and
+         * it match non-elf file.
+         */
+        goto fail;
     }
-
-    obj->fd = fd;
     obj->mapped = file;
     obj->mapped_size = (size_t)filesize;
 
@@ -525,152 +2116,506 @@ fill_lines(int num_traces, void **traces, int check_debuglink,
     shstr = file + shstr_shdr->sh_offset;
 
     for (i = 0; i < ehdr->e_shnum; i++) {
-	section_name = shstr + shdr[i].sh_name;
-	switch (shdr[i].sh_type) {
-	  case SHT_STRTAB:
-	    if (!strcmp(section_name, ".strtab")) {
-		strtab_shdr = shdr + i;
-	    }
-	    else if (!strcmp(section_name, ".dynstr")) {
-		dynstr_shdr = shdr + i;
-	    }
-	    break;
-	  case SHT_SYMTAB:
-	    /* if (!strcmp(section_name, ".symtab")) */
-	    symtab_shdr = shdr + i;
-	    break;
-	  case SHT_DYNSYM:
-	    /* if (!strcmp(section_name, ".dynsym")) */
-	    dynsym_shdr = shdr + i;
-	    break;
-	  case SHT_PROGBITS:
-	    if (!strcmp(section_name, ".debug_line")) {
-		debug_line_shdr = shdr + i;
-	    }
-	    else if (!strcmp(section_name, ".gnu_debuglink")) {
-		gnu_debuglink_shdr = shdr + i;
-	    }
-	    break;
-	}
-    }
-
-    if (offset == -1) {
-	/* main executable */
-	offset = 0;
-	if (dynsym_shdr && dynstr_shdr) {
-	    char *strtab = file + dynstr_shdr->sh_offset;
-	    ElfW(Sym) *symtab = (ElfW(Sym) *)(file + dynsym_shdr->sh_offset);
-	    int symtab_count = (int)(dynsym_shdr->sh_size / sizeof(ElfW(Sym)));
-	    for (j = 0; j < symtab_count; j++) {
-		ElfW(Sym) *sym = &symtab[j];
-		Dl_info info;
-		void *h, *s;
-		if (ELF_ST_TYPE(sym->st_info) != STT_FUNC || sym->st_size <= 0) continue;
-		h = dlopen(NULL, RTLD_NOW|RTLD_LOCAL);
-		if (!h) continue;
-		s = dlsym(h, strtab + sym->st_name);
-		if (!s) continue;
-		if (dladdr(s, &info)) {
-		    dladdr_fbase = (uintptr_t)info.dli_fbase;
-		    break;
-		}
-	    }
-	    if (ehdr->e_type == ET_EXEC) {
-		obj->base_addr = 0;
-	    }
-	    else {
-		/* PIE (position-independent executable) */
-		obj->base_addr = dladdr_fbase;
-	    }
-	}
-    }
-
-    if (!symtab_shdr) {
-	symtab_shdr = dynsym_shdr;
-	strtab_shdr = dynstr_shdr;
-    }
-
-    if (symtab_shdr && strtab_shdr) {
-	char *strtab = file + strtab_shdr->sh_offset;
-	ElfW(Sym) *symtab = (ElfW(Sym) *)(file + symtab_shdr->sh_offset);
-	int symtab_count = (int)(symtab_shdr->sh_size / sizeof(ElfW(Sym)));
-	for (j = 0; j < symtab_count; j++) {
-	    ElfW(Sym) *sym = &symtab[j];
-	    uintptr_t saddr = (uintptr_t)sym->st_value + obj->base_addr;
-	    if (ELF_ST_TYPE(sym->st_info) != STT_FUNC || sym->st_size <= 0) continue;
-	    for (i = offset; i < num_traces; i++) {
-		uintptr_t d = (uintptr_t)traces[i] - saddr;
-		if (lines[i].line > 0 || d <= 0 || d > (uintptr_t)sym->st_size)
-		    continue;
-		/* fill symbol name and addr from .symtab */
-		lines[i].sname = strtab + sym->st_name;
-		lines[i].saddr = saddr;
-		lines[i].path  = obj->path;
-		lines[i].base_addr = obj->base_addr;
-	    }
-	}
-    }
-
-    if (!debug_line_shdr) {
-	/* This file doesn't have .debug_line section,
-	   let's check .gnu_debuglink section instead. */
-	if (gnu_debuglink_shdr && check_debuglink) {
-	    follow_debuglink(file + gnu_debuglink_shdr->sh_offset,
-			     num_traces, traces,
-			     objp, lines, offset);
-	}
-	goto finish;
-    }
-
-    parse_debug_line(num_traces, traces,
-		     file + debug_line_shdr->sh_offset,
-		     debug_line_shdr->sh_size,
-		     obj, lines, offset);
+        char *section_name = shstr + shdr[i].sh_name;
+        switch (shdr[i].sh_type) {
+          case SHT_STRTAB:
+            if (!strcmp(section_name, ".strtab")) {
+                strtab_shdr = shdr + i;
+            }
+            else if (!strcmp(section_name, ".dynstr")) {
+                dynstr_shdr = shdr + i;
+            }
+            break;
+          case SHT_SYMTAB:
+            /* if (!strcmp(section_name, ".symtab")) */
+            symtab_shdr = shdr + i;
+            break;
+          case SHT_DYNSYM:
+            /* if (!strcmp(section_name, ".dynsym")) */
+            dynsym_shdr = shdr + i;
+            break;
+          case SHT_NOTE:
+            if (!strcmp(section_name, ".note.gnu.build-id")) {
+                note_gnu_build_id = shdr + i;
+            }
+            break;
+          case SHT_PROGBITS:
+            if (!strcmp(section_name, ".gnu_debuglink")) {
+                gnu_debuglink_shdr = shdr + i;
+            }
+            else {
+                const char *debug_section_names[] = {
+                    ".debug_abbrev",
+                    ".debug_info",
+                    ".debug_line",
+                    ".debug_ranges",
+                    ".debug_str_offsets",
+                    ".debug_addr",
+                    ".debug_rnglists",
+                    ".debug_str",
+                    ".debug_line_str"
+                };
+
+                for (j=0; j < DWARF_SECTION_COUNT; j++) {
+                    struct dwarf_section *s = obj_dwarf_section_at(obj, j);
+
+                    if (strcmp(section_name, debug_section_names[j]) != 0)
+                        continue;
+
+                    s->ptr = file + shdr[i].sh_offset;
+                    s->size = shdr[i].sh_size;
+                    s->flags = shdr[i].sh_flags;
+                    if (s->flags & SHF_COMPRESSED) {
+                        s->size = uncompress_debug_section(&shdr[i], file, &s->ptr);
+                        if (!s->size) goto fail;
+                    }
+                    break;
+                }
+            }
+            break;
+        }
+    }
+
+    if (offset == 0) {
+        /* main executable */
+        if (dynsym_shdr && dynstr_shdr) {
+            char *strtab = file + dynstr_shdr->sh_offset;
+            ElfW(Sym) *symtab = (ElfW(Sym) *)(file + dynsym_shdr->sh_offset);
+            int symtab_count = (int)(dynsym_shdr->sh_size / sizeof(ElfW(Sym)));
+            void *handle = dlopen(NULL, RTLD_NOW|RTLD_LOCAL);
+            if (handle) {
+                for (j = 0; j < symtab_count; j++) {
+                    ElfW(Sym) *sym = &symtab[j];
+                    Dl_info info;
+                    void *s;
+                    if (ELF_ST_TYPE(sym->st_info) != STT_FUNC || sym->st_size == 0) continue;
+                    s = dlsym(handle, strtab + sym->st_name);
+                    if (s && dladdr(s, &info)) {
+                        obj->base_addr = dladdr_fbase;
+                        dladdr_fbase = (uintptr_t)info.dli_fbase;
+                        break;
+                    }
+                }
+                dlclose(handle);
+            }
+            if (ehdr->e_type == ET_EXEC) {
+                obj->base_addr = 0;
+            }
+            else {
+                /* PIE (position-independent executable) */
+                obj->base_addr = dladdr_fbase;
+            }
+        }
+    }
+
+    if (obj->debug_info.ptr && obj->debug_abbrev.ptr) {
+        DebugInfoReader reader;
+        debug_info_reader_init(&reader, obj);
+        i = 0;
+        while (reader.p < reader.pend) {
+            /* kprintf("%d:%tx: CU[%d]\n", __LINE__, reader.p - reader.obj->debug_info.ptr, i++); */
+            if (di_read_cu(&reader, errout)) goto use_symtab;
+            if (!debug_info_read(&reader, num_traces, traces, lines, offset, errout))
+                goto use_symtab;
+        }
+    }
+    else {
+        /* This file doesn't have dwarf, use symtab or dynsym */
+use_symtab:
+        if (!symtab_shdr) {
+            /* This file doesn't have symtab, use dynsym instead */
+            symtab_shdr = dynsym_shdr;
+            strtab_shdr = dynstr_shdr;
+        }
+
+        if (symtab_shdr && strtab_shdr) {
+            char *strtab = file + strtab_shdr->sh_offset;
+            ElfW(Sym) *symtab = (ElfW(Sym) *)(file + symtab_shdr->sh_offset);
+            int symtab_count = (int)(symtab_shdr->sh_size / sizeof(ElfW(Sym)));
+            for (j = 0; j < symtab_count; j++) {
+                ElfW(Sym) *sym = &symtab[j];
+                uintptr_t saddr = (uintptr_t)sym->st_value + obj->base_addr;
+                if (ELF_ST_TYPE(sym->st_info) != STT_FUNC) continue;
+                for (i = offset; i < num_traces; i++) {
+                    uintptr_t d = (uintptr_t)traces[i] - saddr;
+                    if (lines[i].line > 0 || d > (uintptr_t)sym->st_size)
+                        continue;
+                    /* fill symbol name and addr from .symtab */
+                    if (!lines[i].sname) lines[i].sname = strtab + sym->st_name;
+                    lines[i].saddr = saddr;
+                    lines[i].path  = obj->path;
+                    lines[i].base_addr = obj->base_addr;
+                }
+            }
+        }
+    }
+
+    if (!obj->debug_line.ptr) {
+        /* This file doesn't have .debug_line section,
+           let's check .gnu_debuglink section instead. */
+        if (gnu_debuglink_shdr && check_debuglink) {
+            follow_debuglink(file + gnu_debuglink_shdr->sh_offset,
+                             num_traces, traces,
+                             objp, lines, offset, errout);
+        }
+        if (note_gnu_build_id && check_debuglink) {
+            ElfW(Nhdr) *nhdr = (ElfW(Nhdr)*) (file + note_gnu_build_id->sh_offset);
+            const char *build_id = (char *)(nhdr + 1) + nhdr->n_namesz;
+            follow_debuglink_build_id(build_id, nhdr->n_descsz,
+                               num_traces, traces,
+                               objp, lines, offset, errout);
+        }
+        goto finish;
+    }
+
+    if (parse_debug_line(num_traces, traces,
+            obj->debug_line.ptr,
+            obj->debug_line.size,
+            obj, lines, offset, errout) == -1)
+        goto fail;
+
 finish:
     return dladdr_fbase;
 fail:
     return (uintptr_t)-1;
 }
+#else /* Mach-O */
+/* read file and fill lines */
+static uintptr_t
+fill_lines(int num_traces, void **traces, int check_debuglink,
+        obj_info_t **objp, line_info_t *lines, int offset, FILE *errout)
+{
+# ifdef __LP64__
+#  define LP(x) x##_64
+# else
+#  define LP(x) x
+# endif
+    int fd;
+    off_t filesize;
+    char *file, *p = NULL;
+    obj_info_t *obj = *objp;
+    struct LP(mach_header) *header;
+    uintptr_t dladdr_fbase = 0;
+
+    {
+        char *s = binary_filename;
+        char *base = strrchr(binary_filename, '/')+1;
+        size_t max = PATH_MAX;
+        size_t size = strlen(binary_filename);
+        size_t basesize = size - (base - binary_filename);
+        s += size;
+        max -= size;
+        p = s;
+        size = strlcpy(s, ".dSYM/Contents/Resources/DWARF/", max);
+        if (size == 0) goto fail;
+        s += size;
+        max -= size;
+        if (max <= basesize) goto fail;
+        memcpy(s, base, basesize);
+        s[basesize] = 0;
+
+        fd = open(binary_filename, O_RDONLY);
+        if (fd < 0) {
+            *p = 0; /* binary_filename becomes original file name */
+            fd = open(binary_filename, O_RDONLY);
+            if (fd < 0) {
+                goto fail;
+            }
+        }
+    }
+
+    filesize = lseek(fd, 0, SEEK_END);
+    if (filesize < 0) {
+        int e = errno;
+        close(fd);
+        kprintf("lseek: %s\n", strerror(e));
+        goto fail;
+    }
+#if SIZEOF_OFF_T > SIZEOF_SIZE_T
+    if (filesize > (off_t)SIZE_MAX) {
+        close(fd);
+        kprintf("Too large file %s\n", binary_filename);
+        goto fail;
+    }
+#endif
+    lseek(fd, 0, SEEK_SET);
+    /* async-signal unsafe */
+    file = (char *)mmap(NULL, (size_t)filesize, PROT_READ, MAP_SHARED, fd, 0);
+    if (file == MAP_FAILED) {
+        int e = errno;
+        close(fd);
+        kprintf("mmap: %s\n", strerror(e));
+        goto fail;
+    }
+    close(fd);
+
+    obj->mapped = file;
+    obj->mapped_size = (size_t)filesize;
+
+    header = (struct LP(mach_header) *)file;
+    if (header->magic == LP(MH_MAGIC)) {
+        /* non universal binary */
+        p = file;
+    }
+    else if (header->magic == FAT_CIGAM) {
+        struct LP(mach_header) *mhp = _NSGetMachExecuteHeader();
+        struct fat_header *fat = (struct fat_header *)file;
+        char *q = file + sizeof(*fat);
+        uint32_t nfat_arch = __builtin_bswap32(fat->nfat_arch);
+        /* kprintf("%d: fat:%s %d\n",__LINE__, binary_filename,nfat_arch); */
+        for (uint32_t i = 0; i < nfat_arch; i++) {
+            struct fat_arch *arch = (struct fat_arch *)q;
+            cpu_type_t cputype = __builtin_bswap32(arch->cputype);
+            cpu_subtype_t cpusubtype = __builtin_bswap32(arch->cpusubtype);
+            uint32_t offset = __builtin_bswap32(arch->offset);
+            /* kprintf("%d: fat %d %x/%x %x/%x\n",__LINE__, i, mhp->cputype,mhp->cpusubtype, cputype,cpusubtype); */
+            if (mhp->cputype == cputype &&
+                    (cpu_subtype_t)(mhp->cpusubtype & ~CPU_SUBTYPE_MASK) == cpusubtype) {
+                p = file + offset;
+                file = p;
+                header = (struct LP(mach_header) *)p;
+                if (header->magic == LP(MH_MAGIC)) {
+                    goto found_mach_header;
+                }
+                break;
+            }
+            q += sizeof(*arch);
+        }
+        kprintf("'%s' is not a Mach-O universal binary file!\n",binary_filename);
+        close(fd);
+        goto fail;
+    }
+    else {
+# ifdef __LP64__
+#   define bitsize "64"
+# else
+#   define bitsize "32"
+# endif
+        kprintf("'%s' is not a " bitsize
+                "-bit Mach-O file!\n",binary_filename);
+# undef bitsize
+        close(fd);
+        goto fail;
+    }
+found_mach_header:
+    p += sizeof(*header);
+
+    for (uint32_t i = 0; i < (uint32_t)header->ncmds; i++) {
+        struct load_command *lcmd = (struct load_command *)p;
+        switch (lcmd->cmd) {
+          case LP(LC_SEGMENT):
+            {
+                static const char *debug_section_names[] = {
+                    "__debug_abbrev",
+                    "__debug_info",
+                    "__debug_line",
+                    "__debug_ranges",
+                    "__debug_str_offsets",
+                    "__debug_addr",
+                    "__debug_rnglists",
+                    "__debug_str",
+                    "__debug_line_str",
+                };
+                struct LP(segment_command) *scmd = (struct LP(segment_command) *)lcmd;
+                if (strcmp(scmd->segname, "__TEXT") == 0) {
+                    obj->vmaddr = scmd->vmaddr;
+                }
+                else if (strcmp(scmd->segname, "__DWARF") == 0) {
+                    p += sizeof(struct LP(segment_command));
+                    for (uint64_t i = 0; i < scmd->nsects; i++) {
+                        struct LP(section) *sect = (struct LP(section) *)p;
+                        p += sizeof(struct LP(section));
+                        for (int j=0; j < DWARF_SECTION_COUNT; j++) {
+                            struct dwarf_section *s = obj_dwarf_section_at(obj, j);
+
+                            if (strcmp(sect->sectname, debug_section_names[j]) != 0
+#ifdef __APPLE__
+                                    /* macOS clang 16 generates DWARF5, which have Mach-O
+                                     * section names that are limited to 16 characters,
+                                     * which causes sections with long names to be truncated
+                                     * and not match above.
+                                     * See: https://wiki.dwarfstd.org/Best_Practices.md#Mach-2d-O
+                                     */
+                                    && strncmp(sect->sectname, debug_section_names[j], 16) != 0
+#endif
+                                )
+                                continue;
+
+                            s->ptr = file + sect->offset;
+                            s->size = sect->size;
+                            s->flags = sect->flags;
+                            if (s->flags & SHF_COMPRESSED) {
+                                goto fail;
+                            }
+                            break;
+                        }
+                    }
+                }
+            }
+            break;
+
+          case LC_SYMTAB:
+            {
+                struct symtab_command *cmd = (struct symtab_command *)lcmd;
+                struct LP(nlist) *nl = (struct LP(nlist) *)(file + cmd->symoff);
+                char *strtab = file + cmd->stroff, *sname = 0;
+                uint32_t j;
+                uintptr_t saddr = 0;
+                /* kprintf("[%2d]: %x/symtab %p\n", i, cmd->cmd, (void *)p); */
+                for (j = 0; j < cmd->nsyms; j++) {
+                    uintptr_t symsize, d;
+                    struct LP(nlist) *e = &nl[j];
+                        /* kprintf("[%2d][%4d]: %02x/%x/%x: %s %llx\n", i, j, e->n_type,e->n_sect,e->n_desc,strtab+e->n_un.n_strx,e->n_value); */
+                    if (e->n_type != N_FUN) continue;
+                    if (e->n_sect) {
+                        saddr = (uintptr_t)e->n_value + obj->base_addr - obj->vmaddr;
+                        sname = strtab + e->n_un.n_strx;
+                        /* kprintf("[%2d][%4d]: %02x/%x/%x: %s %llx\n", i, j, e->n_type,e->n_sect,e->n_desc,strtab+e->n_un.n_strx,e->n_value); */
+                        continue;
+                    }
+                    for (int k = offset; k < num_traces; k++) {
+                        d = (uintptr_t)traces[k] - saddr;
+                        symsize = e->n_value;
+                        /* kprintf("%lx %lx %lx\n",saddr,symsize,traces[k]); */
+                        if (lines[k].line > 0 || d > (uintptr_t)symsize)
+                            continue;
+                        /* fill symbol name and addr from .symtab */
+                        if (!lines[k].sname) lines[k].sname = sname;
+                        lines[k].saddr = saddr;
+                        lines[k].path  = obj->path;
+                        lines[k].base_addr = obj->base_addr;
+                    }
+                }
+            }
+        }
+        p += lcmd->cmdsize;
+    }
+
+    if (obj->debug_info.ptr && obj->debug_abbrev.ptr) {
+        DebugInfoReader reader;
+        debug_info_reader_init(&reader, obj);
+        while (reader.p < reader.pend) {
+            if (di_read_cu(&reader, errout)) goto fail;
+            if (!debug_info_read(&reader, num_traces, traces, lines, offset, errout))
+                goto fail;
+        }
+    }
+
+    if (parse_debug_line(num_traces, traces,
+            obj->debug_line.ptr,
+            obj->debug_line.size,
+            obj, lines, offset, errout) == -1)
+        goto fail;
+
+    return dladdr_fbase;
+fail:
+    return (uintptr_t)-1;
+}
+#endif
 
 #define HAVE_MAIN_EXE_PATH
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined(__DragonFly__)
 # include <sys/sysctl.h>
 #endif
-/* ssize_t main_exe_path(void)
+/* ssize_t main_exe_path(FILE *errout)
  *
  * store the path of the main executable to `binary_filename`,
  * and returns strlen(binary_filename).
  * it is NUL terminated.
  */
-#if defined(__linux__)
-ssize_t
-main_exe_path(void)
+#if defined(__linux__) || defined(__NetBSD__)
+static ssize_t
+main_exe_path(FILE *errout)
 {
-# define PROC_SELF_EXE "/proc/self/exe"
+# if defined(__linux__)
+#  define PROC_SELF_EXE "/proc/self/exe"
+# elif defined(__NetBSD__)
+#  define PROC_SELF_EXE "/proc/curproc/exe"
+# endif
     ssize_t len = readlink(PROC_SELF_EXE, binary_filename, PATH_MAX);
+    if (len < 0) return 0;
     binary_filename[len] = 0;
     return len;
 }
-#elif defined(__FreeBSD__)
-ssize_t
-main_exe_path(void)
+#elif defined(__FreeBSD__) || defined(__DragonFly__)
+static ssize_t
+main_exe_path(FILE *errout)
 {
     int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};
     size_t len = PATH_MAX;
     int err = sysctl(mib, 4, binary_filename, &len, NULL, 0);
     if (err) {
-	kprintf("Can't get the path of ruby");
-	return -1;
+        kprintf("Can't get the path of ruby");
+        return -1;
     }
     len--; /* sysctl sets strlen+1 */
     return len;
 }
+#elif defined(HAVE_LIBPROC_H)
+static ssize_t
+main_exe_path(FILE *errout)
+{
+    int len = proc_pidpath(getpid(), binary_filename, PATH_MAX);
+    if (len == 0) return 0;
+    binary_filename[len] = 0;
+    return len;
+}
 #else
 #undef HAVE_MAIN_EXE_PATH
 #endif
 
+static void
+print_line0(line_info_t *line, void *address, FILE *errout)
+{
+    uintptr_t addr = (uintptr_t)address;
+    uintptr_t d = addr - line->saddr;
+    if (!address) {
+        /* inlined */
+        if (line->dirname && line->dirname[0]) {
+            kprintf("%s(%s) %s/%s:%d\n", line->path, line->sname, line->dirname, line->filename, line->line);
+        }
+        else {
+            kprintf("%s(%s) %s:%d\n", line->path, line->sname, line->filename, line->line);
+        }
+    }
+    else if (!line->path) {
+        kprintf("[0x%"PRIxPTR"]\n", addr);
+    }
+    else if (!line->sname) {
+        kprintf("%s(0x%"PRIxPTR") [0x%"PRIxPTR"]\n", line->path, addr-line->base_addr, addr);
+    }
+    else if (!line->saddr) {
+        kprintf("%s(%s) [0x%"PRIxPTR"]\n", line->path, line->sname, addr);
+    }
+    else if (line->line <= 0) {
+        kprintf("%s(%s+0x%"PRIxPTR") [0x%"PRIxPTR"]\n", line->path, line->sname,
+                d, addr);
+    }
+    else if (!line->filename) {
+        kprintf("%s(%s+0x%"PRIxPTR") [0x%"PRIxPTR"] ???:%d\n", line->path, line->sname,
+                d, addr, line->line);
+    }
+    else if (line->dirname && line->dirname[0]) {
+        kprintf("%s(%s+0x%"PRIxPTR") [0x%"PRIxPTR"] %s/%s:%d\n", line->path, line->sname,
+                d, addr, line->dirname, line->filename, line->line);
+    }
+    else {
+        kprintf("%s(%s+0x%"PRIxPTR") [0x%"PRIxPTR"] %s:%d\n", line->path, line->sname,
+                d, addr, line->filename, line->line);
+    }
+}
+
+static void
+print_line(line_info_t *line, void *address, FILE *errout)
+{
+    print_line0(line, address, errout);
+    if (line->next) {
+        print_line(line->next, NULL, errout);
+    }
+}
+
 void
-rb_dump_backtrace_with_lines(int num_traces, void **traces)
+rb_dump_backtrace_with_lines(int num_traces, void **traces, FILE *errout)
 {
     int i;
     /* async-signal unsafe */
@@ -678,531 +2623,99 @@ rb_dump_backtrace_with_lines(int num_traces, void **traces)
     obj_info_t *obj = NULL;
     /* 2 is NULL + main executable */
     void **dladdr_fbases = (void **)calloc(num_traces+2, sizeof(void *));
+
 #ifdef HAVE_MAIN_EXE_PATH
     char *main_path = NULL; /* used on printing backtrace */
     ssize_t len;
-    if ((len = main_exe_path()) > 0) {
-	main_path = (char *)alloca(len + 1);
-	if (main_path) {
-	    uintptr_t addr;
-	    memcpy(main_path, binary_filename, len+1);
-	    append_obj(&obj);
-	    obj->path = main_path;
-	    addr = fill_lines(num_traces, traces, 1, &obj, lines, -1);
-	    if (addr != (uintptr_t)-1) {
-		dladdr_fbases[0] = (void *)addr;
-	    }
-	}
+    if ((len = main_exe_path(errout)) > 0) {
+        main_path = (char *)alloca(len + 1);
+        if (main_path) {
+            uintptr_t addr;
+            memcpy(main_path, binary_filename, len+1);
+            append_obj(&obj);
+            obj->path = main_path;
+            addr = fill_lines(num_traces, traces, 1, &obj, lines, 0, errout);
+            if (addr != (uintptr_t)-1) {
+                dladdr_fbases[0] = (void *)addr;
+            }
+        }
     }
 #endif
 
     /* fill source lines by reading dwarf */
     for (i = 0; i < num_traces; i++) {
-	Dl_info info;
-	if (lines[i].line) continue;
-	if (dladdr(traces[i], &info)) {
-	    const char *path;
-	    void **p;
-
-	    /* skip symbols which is in already checked objects */
-	    /* if the binary is strip-ed, this may effect */
-	    for (p=dladdr_fbases; *p; p++) {
-		if (*p == info.dli_fbase) {
-		    lines[i].path = info.dli_fname;
-		    lines[i].sname = info.dli_sname;
-		    goto next_line;
-		}
-	    }
-	    *p = info.dli_fbase;
-
-	    append_obj(&obj);
-	    obj->base_addr = (uintptr_t)info.dli_fbase;
-	    path = info.dli_fname;
-	    obj->path = path;
-	    lines[i].path = path;
-	    strcpy(binary_filename, path);
-	    fill_lines(num_traces, traces, 1, &obj, lines, i);
-	}
+        Dl_info info;
+        if (lines[i].line) continue;
+        if (dladdr(traces[i], &info)) {
+            const char *path;
+            void **p;
+
+            /* skip symbols which is in already checked objects */
+            /* if the binary is strip-ed, this may effect */
+            for (p=dladdr_fbases; *p; p++) {
+                if (*p == info.dli_fbase) {
+                    if (info.dli_fname) lines[i].path = info.dli_fname;
+                    if (info.dli_sname) lines[i].sname = info.dli_sname;
+                    goto next_line;
+                }
+            }
+            *p = info.dli_fbase;
+
+            append_obj(&obj);
+            obj->base_addr = (uintptr_t)info.dli_fbase;
+            path = info.dli_fname;
+            obj->path = path;
+            if (path) lines[i].path = path;
+            if (info.dli_sname) {
+                lines[i].sname = info.dli_sname;
+                lines[i].saddr = (uintptr_t)info.dli_saddr;
+            }
+            strlcpy(binary_filename, path, PATH_MAX);
+            if (fill_lines(num_traces, traces, 1, &obj, lines, i, errout) == (uintptr_t)-1)
+                break;
+        }
 next_line:
-	continue;
+        continue;
     }
 
     /* output */
     for (i = 0; i < num_traces; i++) {
-	line_info_t *line = &lines[i];
-	uintptr_t addr = (uintptr_t)traces[i];
-	uintptr_t d = addr - line->saddr;
-	if (!line->path) {
-	    kprintf("[0x%lx]\n", addr);
-	}
-	else if (!line->saddr || !line->sname) {
-	    kprintf("%s [0x%lx]\n", line->path, addr);
-	}
-	else if (line->line <= 0) {
-	    kprintf("%s(%s+0x%lx) [0x%lx]\n", line->path, line->sname,
-		    d, addr);
-	}
-	else if (!line->filename) {
-	    kprintf("%s(%s+0x%lx) [0x%lx] ???:%d\n", line->path, line->sname,
-		    d, addr, line->line);
-	}
-	else if (line->dirname && line->dirname[0]) {
-	    kprintf("%s(%s+0x%lx) [0x%lx] %s/%s:%d\n", line->path, line->sname,
-		    d, addr, line->dirname, line->filename, line->line);
-	}
-	else {
-	    kprintf("%s(%s+0x%lx) [0x%lx] %s:%d\n", line->path, line->sname,
-		    d, addr, line->filename, line->line);
-	}
-	/* FreeBSD's backtrace may show _start and so on */
-	if (line->sname && strcmp("main", line->sname) == 0)
-	    break;
+        print_line(&lines[i], traces[i], errout);
+
+        /* FreeBSD's backtrace may show _start and so on */
+        if (lines[i].sname && strcmp("main", lines[i].sname) == 0)
+            break;
     }
 
     /* free */
     while (obj) {
-	obj_info_t *o = obj;
-	obj = o->next;
-	if (o->fd) {
-	    munmap(o->mapped, o->mapped_size);
-	    close(o->fd);
-	}
-	free(o);
+        obj_info_t *o = obj;
+        for (i=0; i < DWARF_SECTION_COUNT; i++) {
+            struct dwarf_section *s = obj_dwarf_section_at(obj, i);
+            if (s->flags & SHF_COMPRESSED) {
+                free(s->ptr);
+            }
+        }
+        if (obj->mapped_size) {
+            munmap(obj->mapped, obj->mapped_size);
+        }
+        obj = o->next;
+        free(o);
+    }
+    for (i = 0; i < num_traces; i++) {
+        line_info_t *line = lines[i].next;
+        while (line) {
+            line_info_t *l = line;
+            line = line->next;
+            free(l);
+        }
     }
     free(lines);
     free(dladdr_fbases);
 }
 
-/* From FreeBSD's lib/libstand/printf.c */
-/*-
- * Copyright (c) 1986, 1988, 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- * (c) UNIX System Laboratories, Inc.
- * All or some portions of this file are derived from material licensed
- * to the University of California by American Telephone and Telegraph
- * Co. or Unix System Laboratories, Inc. and are reproduced herein with
- * the permission of UNIX System Laboratories, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 4. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)subr_prf.c	8.3 (Berkeley) 1/21/94
- */
-
-#include <stdarg.h>
-#define MAXNBUF (sizeof(intmax_t) * CHAR_BIT + 1)
-extern int rb_toupper(int c);
-#define    toupper(c)  rb_toupper(c)
-#define    hex2ascii(hex)  (hex2ascii_data[hex])
-char const hex2ascii_data[] = "0123456789abcdefghijklmnopqrstuvwxyz";
-static inline int imax(int a, int b) { return (a > b ? a : b); }
-static int kvprintf(char const *fmt, void (*func)(int), void *arg, int radix, va_list ap);
-
-static void putce(int c)
-{
-    char s[1];
-    ssize_t ret;
-
-    s[0] = (char)c;
-    ret = write(2, s, 1);
-    (void)ret;
-}
-
-int
-kprintf(const char *fmt, ...)
-{
-	va_list ap;
-	int retval;
-
-	va_start(ap, fmt);
-	retval = kvprintf(fmt, putce, NULL, 10, ap);
-	va_end(ap);
-	return retval;
-}
+#undef kprintf
 
-/*
- * Put a NUL-terminated ASCII number (base <= 36) in a buffer in reverse
- * order; return an optional length and a pointer to the last character
- * written in the buffer (i.e., the first character of the string).
- * The buffer pointed to by `nbuf' must have length >= MAXNBUF.
- */
-static char *
-ksprintn(char *nbuf, uintmax_t num, int base, int *lenp, int upper)
-{
-	char *p, c;
-
-	p = nbuf;
-	*p = '\0';
-	do {
-		c = hex2ascii(num % base);
-		*++p = upper ? toupper(c) : c;
-	} while (num /= base);
-	if (lenp)
-		*lenp = (int)(p - nbuf);
-	return (p);
-}
-
-/*
- * Scaled down version of printf(3).
- *
- * Two additional formats:
- *
- * The format %b is supported to decode error registers.
- * Its usage is:
- *
- *	printf("reg=%b\n", regval, "<base><arg>*");
- *
- * where <base> is the output base expressed as a control character, e.g.
- * \10 gives octal; \20 gives hex.  Each arg is a sequence of characters,
- * the first of which gives the bit number to be inspected (origin 1), and
- * the next characters (up to a control character, i.e. a character <= 32),
- * give the name of the register.  Thus:
- *
- *	kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
- *
- * would produce output:
- *
- *	reg=3<BITTWO,BITONE>
- *
- * XXX:  %D  -- Hexdump, takes pointer and separator string:
- *		("%6D", ptr, ":")   -> XX:XX:XX:XX:XX:XX
- *		("%*D", len, ptr, " " -> XX XX XX XX ...
- */
-static int
-kvprintf(char const *fmt, void (*func)(int), void *arg, int radix, va_list ap)
-{
-#define PCHAR(c) {int cc=(c); if (func) (*func)(cc); else *d++ = cc; retval++; }
-	char nbuf[MAXNBUF];
-	char *d;
-	const char *p, *percent, *q;
-	unsigned char *up;
-	int ch, n;
-	uintmax_t num;
-	int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
-	int cflag, hflag, jflag, tflag, zflag;
-	int dwidth, upper;
-	char padc;
-	int stop = 0, retval = 0;
-
-	num = 0;
-	if (!func)
-		d = (char *) arg;
-	else
-		d = NULL;
-
-	if (fmt == NULL)
-		fmt = "(fmt null)\n";
-
-	if (radix < 2 || radix > 36)
-		radix = 10;
-
-	for (;;) {
-		padc = ' ';
-		width = 0;
-		while ((ch = (unsigned char)*fmt++) != '%' || stop) {
-			if (ch == '\0')
-				return (retval);
-			PCHAR(ch);
-		}
-		percent = fmt - 1;
-		qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
-		sign = 0; dot = 0; dwidth = 0; upper = 0;
-		cflag = 0; hflag = 0; jflag = 0; tflag = 0; zflag = 0;
-reswitch:	switch (ch = (unsigned char)*fmt++) {
-		case '.':
-			dot = 1;
-			goto reswitch;
-		case '#':
-			sharpflag = 1;
-			goto reswitch;
-		case '+':
-			sign = 1;
-			goto reswitch;
-		case '-':
-			ladjust = 1;
-			goto reswitch;
-		case '%':
-			PCHAR(ch);
-			break;
-		case '*':
-			if (!dot) {
-				width = va_arg(ap, int);
-				if (width < 0) {
-					ladjust = !ladjust;
-					width = -width;
-				}
-			} else {
-				dwidth = va_arg(ap, int);
-			}
-			goto reswitch;
-		case '0':
-			if (!dot) {
-				padc = '0';
-				goto reswitch;
-			}
-		case '1': case '2': case '3': case '4':
-		case '5': case '6': case '7': case '8': case '9':
-				for (n = 0;; ++fmt) {
-					n = n * 10 + ch - '0';
-					ch = *fmt;
-					if (ch < '0' || ch > '9')
-						break;
-				}
-			if (dot)
-				dwidth = n;
-			else
-				width = n;
-			goto reswitch;
-		case 'b':
-			num = (unsigned int)va_arg(ap, int);
-			p = va_arg(ap, char *);
-			for (q = ksprintn(nbuf, num, *p++, NULL, 0); *q;)
-				PCHAR(*q--);
-
-			if (num == 0)
-				break;
-
-			for (tmp = 0; *p;) {
-				n = *p++;
-				if (num & (1 << (n - 1))) {
-					PCHAR(tmp ? ',' : '<');
-					for (; (n = *p) > ' '; ++p)
-						PCHAR(n);
-					tmp = 1;
-				} else
-					for (; *p > ' '; ++p)
-						continue;
-			}
-			if (tmp)
-				PCHAR('>');
-			break;
-		case 'c':
-			PCHAR(va_arg(ap, int));
-			break;
-		case 'D':
-			up = va_arg(ap, unsigned char *);
-			p = va_arg(ap, char *);
-			if (!width)
-				width = 16;
-			while(width--) {
-				PCHAR(hex2ascii(*up >> 4));
-				PCHAR(hex2ascii(*up & 0x0f));
-				up++;
-				if (width)
-					for (q=p;*q;q++)
-						PCHAR(*q);
-			}
-			break;
-		case 'd':
-		case 'i':
-			base = 10;
-			sign = 1;
-			goto handle_sign;
-		case 'h':
-			if (hflag) {
-				hflag = 0;
-				cflag = 1;
-			} else
-				hflag = 1;
-			goto reswitch;
-		case 'j':
-			jflag = 1;
-			goto reswitch;
-		case 'l':
-			if (lflag) {
-				lflag = 0;
-				qflag = 1;
-			} else
-				lflag = 1;
-			goto reswitch;
-		case 'n':
-			if (jflag)
-				*(va_arg(ap, intmax_t *)) = retval;
-			else if (qflag)
-				*(va_arg(ap, int64_t *)) = retval;
-			else if (lflag)
-				*(va_arg(ap, long *)) = retval;
-			else if (zflag)
-				*(va_arg(ap, size_t *)) = retval;
-			else if (hflag)
-				*(va_arg(ap, short *)) = retval;
-			else if (cflag)
-				*(va_arg(ap, char *)) = retval;
-			else
-				*(va_arg(ap, int *)) = retval;
-			break;
-		case 'o':
-			base = 8;
-			goto handle_nosign;
-		case 'p':
-			base = 16;
-			sharpflag = (width == 0);
-			sign = 0;
-			num = (uintptr_t)va_arg(ap, void *);
-			goto number;
-		case 'q':
-			qflag = 1;
-			goto reswitch;
-		case 'r':
-			base = radix;
-			if (sign)
-				goto handle_sign;
-			goto handle_nosign;
-		case 's':
-			p = va_arg(ap, char *);
-			if (p == NULL)
-				p = "(null)";
-			if (!dot)
-				n = (int)strlen (p);
-			else
-				for (n = 0; n < dwidth && p[n]; n++)
-					continue;
-
-			width -= n;
-
-			if (!ladjust && width > 0)
-				while (width--)
-					PCHAR(padc);
-			while (n--)
-				PCHAR(*p++);
-			if (ladjust && width > 0)
-				while (width--)
-					PCHAR(padc);
-			break;
-		case 't':
-			tflag = 1;
-			goto reswitch;
-		case 'u':
-			base = 10;
-			goto handle_nosign;
-		case 'X':
-			upper = 1;
-		case 'x':
-			base = 16;
-			goto handle_nosign;
-		case 'y':
-			base = 16;
-			sign = 1;
-			goto handle_sign;
-		case 'z':
-			zflag = 1;
-			goto reswitch;
-handle_nosign:
-			sign = 0;
-			if (jflag)
-				num = va_arg(ap, uintmax_t);
-			else if (qflag)
-				num = va_arg(ap, uint64_t);
-			else if (tflag)
-				num = va_arg(ap, ptrdiff_t);
-			else if (lflag)
-				num = va_arg(ap, unsigned long);
-			else if (zflag)
-				num = va_arg(ap, size_t);
-			else if (hflag)
-				num = (unsigned short)va_arg(ap, int);
-			else if (cflag)
-				num = (unsigned char)va_arg(ap, int);
-			else
-				num = va_arg(ap, unsigned int);
-			goto number;
-handle_sign:
-			if (jflag)
-				num = va_arg(ap, intmax_t);
-			else if (qflag)
-				num = va_arg(ap, int64_t);
-			else if (tflag)
-				num = va_arg(ap, ptrdiff_t);
-			else if (lflag)
-				num = va_arg(ap, long);
-			else if (zflag)
-				num = va_arg(ap, ssize_t);
-			else if (hflag)
-				num = (short)va_arg(ap, int);
-			else if (cflag)
-				num = (char)va_arg(ap, int);
-			else
-				num = va_arg(ap, int);
-number:
-			if (sign && (intmax_t)num < 0) {
-				neg = 1;
-				num = -(intmax_t)num;
-			}
-			p = ksprintn(nbuf, num, base, &n, upper);
-			tmp = 0;
-			if (sharpflag && num != 0) {
-				if (base == 8)
-					tmp++;
-				else if (base == 16)
-					tmp += 2;
-			}
-			if (neg)
-				tmp++;
-
-			if (!ladjust && padc == '0')
-				dwidth = width - tmp;
-			width -= tmp + imax(dwidth, n);
-			dwidth -= n;
-			if (!ladjust)
-				while (width-- > 0)
-					PCHAR(' ');
-			if (neg)
-				PCHAR('-');
-			if (sharpflag && num != 0) {
-				if (base == 8) {
-					PCHAR('0');
-				} else if (base == 16) {
-					PCHAR('0');
-					PCHAR('x');
-				}
-			}
-			while (dwidth-- > 0)
-				PCHAR('0');
-
-			while (*p)
-				PCHAR(*p--);
-
-			if (ladjust)
-				while (width-- > 0)
-					PCHAR(' ');
-
-			break;
-		default:
-			while (percent < fmt)
-				PCHAR(*percent++);
-			/*
-			 * Since we ignore an formatting argument it is no
-			 * longer safe to obey the remaining formatting
-			 * arguments as the arguments will no longer match
-			 * the format specs.
-			 */
-			stop = 1;
-			break;
-		}
-	}
-#undef PCHAR
-}
 #else /* defined(USE_ELF) */
 #error not supported
 #endif
diff --git a/addr2line.h b/addr2line.h