1 files changed, 7 insertions, 0 deletions
diff --git a/spec/ruby/core/array/array_spec.rb b/spec/ruby/core/array/array_spec.rb
new file mode 100644
index 0000000000..855f17348f
--- /dev/null
+++ b/spec/ruby/core/array/array_spec.rb
@@ -0,0 +1,7 @@
+require_relative '../../spec_helper'
+
+describe "Array" do
+  it "includes Enumerable" do
+    Array.include?(Enumerable).should == true
+  end
+end
diff --git a/.appveyor.yml b/.appveyor.yml
deleted file mode 100644
index f3f77ebee0..0000000000
--- a/.appveyor.yml
+++ /dev/null
@@ -1,126 +0,0 @@
----
-version: '{build}'
-init:
-  - git config --global user.name git
-  - git config --global user.email svn-admin@ruby-lang.org
-  - git config --global core.autocrlf false
-  - git config --global core.eol lf
-  - git config --global advice.detachedHead 0
-shallow_clone: true
-clone_depth: 10
-platform:
-  - x64
-skip_commits:
-  message: /^\[DOC\]/
-  files:
-    - doc/*
-    - '**/*.md'
-    - '**/*.rdoc'
-environment:
-  ruby_version: "24-%Platform%"
-  zlib_version: "1.2.13"
-  matrix:
-    - build: vs
-      vs: 120
-      ssl: OpenSSL
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
-      GEMS_FOR_TEST: ""
-    - build: vs
-      vs: 140
-      ssl: OpenSSL-v111
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-      GEMS_FOR_TEST: ""
-  RELINE_TEST_ENCODING: "UTF-8"
-for:
--
-  matrix:
-    only:
-      - build: vs
-  install:
-    - ver
-    - chcp
-    - SET BITS=%Platform:x86=32%
-    - SET BITS=%BITS:x=%
-    - SET OPENSSL_DIR=C:\%ssl%-Win%BITS%
-    - CALL SET vcvars=%%^VS%VS%COMNTOOLS^%%..\..\VC\vcvarsall.bat
-    - SET vcvars
-    - '"%vcvars%" %Platform:x64=amd64%'
-    - SET ruby_path=C:\Ruby%ruby_version:-x86=%
-    - SET PATH=\usr\local\bin;%ruby_path%\bin;%PATH%;C:\msys64\mingw64\bin;C:\msys64\usr\bin
-    - ruby --version
-    - 'cl'
-    - echo> Makefile srcdir=.
-    - echo>> Makefile MSC_VER=0
-    - echo>> Makefile RT=none
-    - echo>> Makefile RT_VER=0
-    - echo>> Makefile BUILTIN_ENCOBJS=nul
-    - type win32\Makefile.sub >> Makefile
-    - nmake %mflags% up VCSUP="echo Update OK"
-    - nmake %mflags% extract-extlibs
-    - del Makefile
-    - mkdir \usr\local\bin
-    - mkdir \usr\local\include
-    - mkdir \usr\local\lib
-    - SET ZLIB_ZIP=.downloaded-cache\zlib%zlib_version:.=%.zip
-    - if not exist %ZLIB_ZIP% curl -fsSL -o %ZLIB_ZIP% --retry 10 https://zlib.net/zlib%zlib_version:.=%.zip
-    - 7z x -aos -o%APPVEYOR_BUILD_FOLDER%\ext\zlib %ZLIB_ZIP%
-    - for %%I in (%OPENSSL_DIR%\*.dll) do mklink /h \usr\local\bin\%%~nxI %%I
-    - attrib +r /s /d
-    - mkdir %Platform%-mswin_%vs%
-  build_script:
-    - cd %APPVEYOR_BUILD_FOLDER%
-    - cd %Platform%-mswin_%vs%
-    - >-
-      ..\win32\configure.bat
-      --without-ext=+,dbm,gdbm,readline
-      --with-opt-dir=/usr/local
-      --with-openssl-dir=%OPENSSL_DIR:\=/%
-    - nmake -l
-    - nmake install-nodoc
-    - \usr\bin\ruby -v -e "p :locale => Encoding.find('locale'), :filesystem => Encoding.find('filesystem')"
-    - if not "%GEMS_FOR_TEST%" == "" \usr\bin\gem install --no-document %GEMS_FOR_TEST%
-    - \usr\bin\ruby -ropenssl -e "puts 'Build    ' + OpenSSL::OPENSSL_VERSION, 'Runtime  ' + OpenSSL::OPENSSL_LIBRARY_VERSION"
-  test_script:
-    - set /a JOBS=%NUMBER_OF_PROCESSORS%
-    - nmake -l "TESTOPTS=-v -q" btest
-    - nmake -l "TESTOPTS=-v -q" test-basic
-    - >-
-      nmake -l "TESTOPTS=-v --timeout-scale=3.0
-      --excludes=../test/excludes/_appveyor -j%JOBS%
-      --exclude readline
-      --exclude win32ole
-      --exclude test_bignum
-      --exclude test_syntax
-      --exclude test_open-uri
-      --exclude test_bundled_ca
-      " test-all
-    # separately execute tests without -j which may crash worker with -j.
-    - >-
-      nmake -l
-      "TESTOPTS=-v --timeout-scale=3.0 --excludes=../test/excludes/_appveyor"
-      TESTS="
-      ../test/win32ole
-      ../test/ruby/test_bignum.rb
-      ../test/ruby/test_syntax.rb
-      ../test/open-uri/test_open-uri.rb
-      ../test/rubygems/test_bundled_ca.rb
-      " test-all
-    - nmake -l test-spec MSPECOPT=-fs # not using `-j` because sometimes `mspec -j` silently dies on Windows
-notifications:
-  - provider: Webhook
-    method: POST
-    url:
-      secure: CcFlJNDJ/a6to7u3Z4Fnz6dScEPNx7hTha2GkSRlV+1U6dqmxY/7uBcLXYb9gR3jfQk6w+2o/HrjNAyXMNGU/JOka3s2WRI4VKitzM+lQ08owvJIh0R7LxrGH0J2e81U # ruby-lang slack: ruby/simpler-alerts-bot
-    body: >-
-      {{^isPullRequest}}
-        {
-          "ci": "AppVeyor CI",
-          "env": "Visual Studio 2013 / 2015",
-          "url": "{{buildUrl}}",
-          "commit": "{{commitId}}",
-          "branch": "{{branch}}"
-        }
-      {{/isPullRequest}}
-    on_build_success: false
-    on_build_failure: true
-    on_build_status_changed: false
diff --git a/.cirrus.yml b/.cirrus.yml
deleted file mode 100644
index c8fb326c89..0000000000
--- a/.cirrus.yml
+++ /dev/null
@@ -1,64 +0,0 @@
-# This CI is used to test Arm cases. We can set the maximum 16 tasks.
-# The entire testing design is inspired from .github/workflows/compilers.yml.
-
-# By default, Cirrus mounts an empty volume to `/tmp`
-# which triggers all sorts of warnings like "system temporary path is world-writable: /tmp".
-# Lets workaround it by specifying a custom volume mount point.
-env:
-  CIRRUS_VOLUME: /cirrus-ci-volume
-  LANG: C.UTF-8
-
-task:
-  name: Arm64 Graviton2 / $CC
-  skip: "changesIncludeOnly('doc/**', '**.{md,rdoc}')"
-  arm_container:
-    # We use the arm64 images at http://ghcr.io/ruby/ruby-ci-image .
-    image: ghcr.io/ruby/ruby-ci-image:$CC
-    # Define the used cpu core in each matrix task. We can use total 16 cpu
-    # cores in entire matrix. [cpu] = [total cpu: 16] / [number of tasks]
-    cpu: 8
-    # We can request maximum 4 GB per cpu.
-    # [memory per task] = [memory per cpu: 4 GB] * [cpu]
-    memory: 32G
-  env:
-    CIRRUS_CLONE_DEPTH: 50
-    optflags: '-O1'
-    debugflags: '-ggdb3'
-    RUBY_PREFIX: /tmp/ruby-prefix
-    RUBY_DEBUG: ci rgengc
-    RUBY_TESTOPTS: >-
-      -q
-      --color=always
-      --tty=no
-    matrix:
-      CC: clang-12
-      CC: gcc-11
-  id_script: id
-  set_env_script:
-    # Set `GNUMAKEFLAGS`, because the flags are GNU make specific. Note using
-    # the `make` environment variable used in compilers.yml causes some rubygems
-    # tests to fail.
-    # https://github.com/rubygems/rubygems/issues/4921
-    - echo "GNUMAKEFLAGS=-s -j$((1 + $CIRRUS_CPU))" >> $CIRRUS_ENV
-  print_env_script:
-    - echo "GNUMAKEFLAGS=$GNUMAKEFLAGS"
-  # Arm containers are executed in AWS's EKS, and it's not yet supporting IPv6
-  # See https://github.com/aws/containers-roadmap/issues/835
-  disable_ipv6_script: sudo ./tool/disable_ipv6.sh
-  autogen_script: ./autogen.sh
-  configure_script: >-
-    ./configure -C
-    --enable-debug-env
-    --disable-install-doc
-    --with-ext=-test-/cxxanyargs,+
-    --prefix="$RUBY_PREFIX"
-  make_extract-extlibs_script: make extract-extlibs
-  make_incs_script: make incs
-  make_script: make
-  make_leaked-globals_script: make leaked-globals
-  make_test_script: make test
-  make_install_script: make install
-  install_gems_for_test_script: $RUBY_PREFIX/bin/gem install --no-doc timezone tzinfo
-  make_test-tool_script: make test-tool
-  make_test-all_script: make test-all
-  make_test-spec_script: make test-spec
diff --git a/.dir-locals.el b/.dir-locals.el
deleted file mode 100644
index 8f4b96445c..0000000000
--- a/.dir-locals.el
+++ /dev/null
@@ -1,39 +0,0 @@
-;; 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 6e08f42698..eeb565b08b 100644
--- a/.document
+++ b/.document
@@ -9,22 +9,8 @@
 
 # prelude
 prelude.rb
-rbconfig.rb
 
-array.rb
-ast.rb
-dir.rb
-gc.rb
-io.rb
-kernel.rb
-marshal.rb
-numeric.rb
-nilclass.rb
-pack.rb
-ractor.rb
-timev.rb
-trace_point.rb
-warning.rb
+rbconfig.rb
 
 # the lib/ directory (which has its own .document file)
 lib
@@ -33,18 +19,9 @@ lib
 ext
 
 # rdoc files
-NEWS.md
+NEWS
 
 README.md
 README.ja.md
 
-COPYING
-COPYING.ja
-CONTRIBUTING.md
-
-LEGAL
-
-# win32/README.win32 linked from README.md
-win32
-
 doc
diff --git a/.editorconfig b/.editorconfig
index 4633a7acae..49cc692091 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -3,7 +3,7 @@ root = true
 [*]
 end_of_line = lf
 indent_size = 4
-indent_style = space
+indent_style = tab
 insert_final_newline = true
 tab_width = 8
 trim_trailing_whitespace = true
@@ -13,18 +13,12 @@ end_of_line = crlf
 
 [*.gemspec]
 indent_size = 2
+indent_style = space
 
 [*.rb]
 indent_size = 2
+indent_style = space
 
 [*.yml]
 indent_size = 2
-
-[{*[Mm]akefile*,*.mak,*.mk,depend}]
-indent_style = tab
-
-[enc/*]
-indent_size = 2
-
-[reg*.[ch]]
-indent_size = 2
+indent_style = space
diff --git a/.gdbinit b/.gdbinit
index 8979e8b47c..a188ffa172 100644
--- a/.gdbinit
+++ b/.gdbinit
@@ -1,5 +1,3 @@
-set startup-with-shell off
-
 define hook-run
   set $color_type = 0
   set $color_highlite = 0
@@ -136,7 +134,7 @@ define rp
       printf "%sT_ARRAY%s: len=%ld ", $color_type, $color_end, $len
       if ($flags & RUBY_FL_USER2)
 	printf "(shared) shared="
-	output/x ((struct RArray*)($arg0))->as.heap.aux.shared_root
+	output/x ((struct RArray*)($arg0))->as.heap.aux.shared
 	printf " "
       else
 	printf "(ownership) capa=%ld ", ((struct RArray*)($arg0))->as.heap.aux.capa
@@ -156,12 +154,8 @@ define rp
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_HASH
     printf "%sT_HASH%s: ", $color_type, $color_end,
-    if (((struct RHash *)($arg0))->basic.flags & RHASH_ST_TABLE_FLAG)
-      printf "st len=%ld ", ((struct RHash *)($arg0))->as.st->num_entries
-    else
-      printf "li len=%ld bound=%ld ", \
-        ((((struct RHash *)($arg0))->basic.flags & RHASH_AR_TABLE_SIZE_MASK) >> RHASH_AR_TABLE_SIZE_SHIFT), \
-        ((((struct RHash *)($arg0))->basic.flags & RHASH_AR_TABLE_BOUND_MASK) >> RHASH_AR_TABLE_BOUND_SHIFT)
+    if ((struct RHash *)($arg0))->ntbl
+      printf "len=%ld ", ((struct RHash *)($arg0))->ntbl->num_entries
     end
     print (struct RHash *)($arg0)
   else
@@ -265,10 +259,6 @@ 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
@@ -304,7 +294,6 @@ define rp
   end
   end
   end
-  end
 end
 document rp
   Print a Ruby's VALUE.
@@ -709,6 +698,12 @@ 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
@@ -747,6 +742,12 @@ 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
@@ -773,6 +774,12 @@ 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
@@ -790,6 +797,17 @@ 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
@@ -1003,55 +1021,24 @@ define print_lineno
     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
+  set $i = 0
+  set $size = $iseq->body->insns_info_size
+  set $table = $iseq->body->insns_info
   #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
+    set $i = 1
+    while $i < $size
+      #printf "table[%d]: position: %d, line: %d, pos: %d\n", $i, $table[$i].position, $table[$i].line_no, $pos
+      if $table[$i].position > $pos
+        loop_break
       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
+      set $i = $i + 1
+      if $table[$i].position == $pos
+        loop_break
       end
     end
-    printf "%d", $table[$index-1].line_no
-  end
+    printf "%d", $table[$i-1].line_no
   end
 end
 
@@ -1078,9 +1065,9 @@ define print_id
   else
     set $serial = (rb_id_serial_t)$id
   end
-  if $serial && $serial <= ruby_global_symbols.last_id
+  if $serial && $serial <= global_symbols.last_id
     set $idx = $serial / ID_ENTRY_UNIT
-    set $ids = (struct RArray *)ruby_global_symbols.ids
+    set $ids = (struct RArray *)global_symbols.ids
     set $flags = $ids->basic.flags
     if ($flags & RUBY_FL_USER1)
       set $idsptr = $ids->as.ary
@@ -1102,11 +1089,11 @@ define print_id
           set $arylen = $ary->as.heap.len
         end
         set $result = $aryptr[($serial % ID_ENTRY_UNIT) * ID_ENTRY_SIZE + $t]
-        if $result != RUBY_Qnil
+	if $result != RUBY_Qnil
           print_string $result
-        else
-          echo undef
-        end
+	else
+	  echo undef
+	end
       end
     end
   end
@@ -1279,7 +1266,7 @@ document rb_count_objects
   Counts all objects grouped by type.
 end
 
-# Details: https://bugs.ruby-lang.org/projects/ruby-master/wiki/MachineInstructionsTraceWithGDB
+# Details: https://bugs.ruby-lang.org/projects/ruby-trunk/wiki/MachineInstructionsTraceWithGDB
 define trace_machine_instructions
   set logging on
   set height 0
@@ -1318,33 +1305,3 @@ define dump_node
                         ((struct RString*)$str)->as.heap.ptr : \
                         ((struct RString*)$str)->as.ary)
 end
-
-define print_flags
-  printf "RUBY_FL_WB_PROTECTED: %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_WB_PROTECTED ? "1" : "0"
-  printf "RUBY_FL_PROMOTED0   : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_PROMOTED0 ? "1" : "0"
-  printf "RUBY_FL_PROMOTED1   : %s\n", ((struct RBasic*)($arg0))->flags & RUBY_FL_PROMOTED1 ? "1" : "0"
-  printf "RUBY_FL_FINALIZE    : %s\n", ((struct RBasic*)($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
diff --git a/.gitattributes b/.gitattributes
index d0c2d266b4..6ca2f89462 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -4,5 +4,3 @@ 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
diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
deleted file mode 100644
index 15abc79af6..0000000000
--- a/.github/CODEOWNERS
+++ /dev/null
@@ -1,10 +0,0 @@
-# Lines starting with '#' are comments.
-# Each line is a file pattern followed by one or more owners.
-# Code owners will be automatically tagged as reviewers when a pull request is opened
-
-# YJIT sources and tests
-yjit* @maximecb @xrxr @tenderlove
-doc/yjit/* @maximecb @xrxr @tenderlove
-bootstraptest/test_yjit* @maximecb @xrxr @tenderlove
-test/ruby/test_yjit* @maximecb @xrxr @tenderlove
-.github/workflows/yjit* @maximecb @xrxr @tenderlove
diff --git a/.github/SECURITY.md b/.github/SECURITY.md
deleted file mode 100644
index 56baa29942..0000000000
--- a/.github/SECURITY.md
+++ /dev/null
@@ -1,9 +0,0 @@
-# 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/codeql/codeql-config.yml b/.github/codeql/codeql-config.yml
deleted file mode 100644
index 91f82b842b..0000000000
--- a/.github/codeql/codeql-config.yml
+++ /dev/null
@@ -1,3 +0,0 @@
-name: "CodeQL config for the Ruby language"
-
-languages: cpp
diff --git a/.github/workflows/baseruby.yml b/.github/workflows/baseruby.yml
deleted file mode 100644
index 3f062abed0..0000000000
--- a/.github/workflows/baseruby.yml
+++ /dev/null
@@ -1,65 +0,0 @@
-name: BASERUBY Check
-
-on:
-  push:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-
-concurrency:
-  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
-  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
-
-jobs:
-  baseruby:
-    name: BASERUBY
-    runs-on: ubuntu-20.04
-    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') && !contains(github.event.pull_request.labels.*.name, 'Documentation') }}
-    strategy:
-      matrix:
-        ruby:
-          - ruby-2.2
-#         - ruby-2.3
-#         - ruby-2.4
-#         - ruby-2.5
-#         - ruby-2.6
-          - ruby-2.7
-          - ruby-3.0
-
-    steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
-        with:
-          path: .downloaded-cache
-          key: downloaded-cache
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: ${{ matrix.ruby }}
-          bundler: none
-      - run: echo "GNUMAKEFLAGS=-j$((1 + $(nproc --all)))" >> $GITHUB_ENV
-      - run: sudo apt-get install build-essential autoconf bison
-      - run: ./autogen.sh
-      - run: ./configure --disable-install-doc
-      - run: make common-srcs
-      - run: make incs
-      - run: make all
-      - run: make test
-      - uses: k0kubun/action-slack@v2.0.0
-        with:
-          payload: |
-            {
-              "ci": "GitHub Actions",
-              "env": "${{ github.workflow }} / BASERUBY @ ${{ matrix.ruby }}",
-              "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
-              "commit": "${{ github.sha }}",
-              "branch": "${{ github.ref }}".split('/').reverse()[0]
-            }
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' }}
diff --git a/.github/workflows/check_dependencies.yml b/.github/workflows/check_dependencies.yml
deleted file mode 100644
index f606a86b66..0000000000
--- a/.github/workflows/check_dependencies.yml
+++ /dev/null
@@ -1,65 +0,0 @@
-name: Check Dependencies
-on:
-  push:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-
-concurrency:
-  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
-  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
-
-jobs:
-  update-deps:
-    strategy:
-      matrix:
-        os: [ubuntu-20.04]
-      fail-fast: true
-    runs-on: ${{ matrix.os }}
-    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') && !contains(github.event.pull_request.labels.*.name, 'Documentation') }}
-    steps:
-      - 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 libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev bison autoconf ruby
-        if: ${{ contains(matrix.os, 'ubuntu') }}
-      - name: Install libraries
-        run: |
-          brew upgrade
-          brew install gmp libffi openssl@1.1 zlib autoconf automake libtool readline
-        if: ${{ contains(matrix.os, 'macos') }}
-      - name: git config
-        run: |
-          git config --global advice.detachedHead 0
-          git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
-        with:
-          path: .downloaded-cache
-          key: downloaded-cache
-      - run: ./autogen.sh
-      - name: Run configure
-        run: ./configure -C --disable-install-doc --disable-rubygems --with-gcc 'optflags=-O0' 'debugflags=-save-temps=obj -g'
-      - run: make all golf
-      - run: ruby tool/update-deps --fix
-      - run: git diff --no-ext-diff --ignore-submodules --exit-code
-      - uses: k0kubun/action-slack@v2.0.0
-        with:
-          payload: |
-            {
-              "ci": "GitHub Actions",
-              "env": "${{ matrix.os }} / Dependencies need to update",
-              "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
-              "commit": "${{ github.sha }}",
-              "branch": "${{ github.ref }}".split('/').reverse()[0]
-            }
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' }}
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
deleted file mode 100644
index 09d9135fa0..0000000000
--- a/.github/workflows/codeql-analysis.yml
+++ /dev/null
@@ -1,61 +0,0 @@
-name: "Code scanning - action"
-
-on:
-  push:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-  schedule:
-    - cron: '0 12 * * 4'
-
-concurrency:
-  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
-  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
-
-jobs:
-  CodeQL-Build:
-
-    # CodeQL runs on ubuntu-latest and windows-latest
-    runs-on: ubuntu-latest
-    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') && !contains(github.event.pull_request.labels.*.name, 'Documentation') }}
-
-    env:
-      enable_install_doc: no
-
-    steps:
-    - name: Install libraries
-      run: |
-        set -x
-        sudo apt-get update -q || :
-        sudo apt-get install --no-install-recommends -q -y build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev bison autoconf ruby
-
-    - name: Checkout repository
-      uses: actions/checkout@v3
-
-    - uses: actions/cache@v3
-      with:
-        path: .downloaded-cache
-        key: downloaded-cache
-
-    - name: Remove an obsolete rubygems vendored file
-      run: sudo rm /usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb
-
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
-      with:
-        config-file: ./.github/codeql/codeql-config.yml
-
-    - name: Set ENV
-      run: echo "GNUMAKEFLAGS=-j$((1 + $(nproc --all)))" >> $GITHUB_ENV
-
-    - name: Autobuild
-      uses: github/codeql-action/autobuild@v2
-
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
diff --git a/.github/workflows/compilers.yml b/.github/workflows/compilers.yml
deleted file mode 100644
index 504792f768..0000000000
--- a/.github/workflows/compilers.yml
+++ /dev/null
@@ -1,245 +0,0 @@
-name: Compilations
-
-on:
-  push:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-
-concurrency:
-  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
-  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
-
-# Github actions does not support YAML anchors.  This creative use of
-# environment variables (plus the "echo $GITHUB_ENV" hack) is to reroute that
-# restriction.
-env:
-  default_cc: clang-14
-  append_cc: ''
-  crosshost: ''
-
-  # -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.
-  optflags: '-O1'
-
-  # -g0 disables backtraces when SEGV.  Do not set that.
-  debugflags: '-ggdb3'
-
-  default_configure: >-
-    --enable-debug-env
-    --disable-install-doc
-    --with-ext=-test-/cxxanyargs,+
-  append_configure: >-
-    --without-valgrind
-    --without-jemalloc
-    --without-gmp
-
-  UPDATE_UNICODE: >-
-    UNICODE_FILES=.
-    UNICODE_PROPERTY_FILES=.
-    UNICODE_AUXILIARY_FILES=.
-    UNICODE_EMOJI_FILES=.
-  CONFIGURE_TTY: never
-  GITPULLOPTIONS: --no-tags origin ${{github.ref}}
-  RUBY_DEBUG: ci rgengc
-  RUBY_TESTOPTS: >-
-    -q
-    --color=always
-    --tty=no
-
-jobs:
-  compile:
-    strategy:
-      fail-fast: false
-      matrix:
-        entry:
-          - { key: default_cc, name: gcc-11,    value: gcc-11,    container: gcc-11 }
-          - { key: default_cc, name: gcc-10,    value: gcc-10,    container: gcc-10 }
-          - { key: default_cc, name: gcc-9,     value: gcc-9,     container: gcc-9 }
-          - { key: default_cc, name: gcc-8,     value: gcc-8,     container: gcc-8 }
-          - { key: default_cc, name: gcc-7,     value: gcc-7,     container: gcc-7 }
-          - { key: default_cc, name: gcc-6,     value: gcc-6,     container: gcc-6 }
-          - { key: default_cc, name: gcc-5,     value: gcc-5,     container: gcc-5 }
-          - { key: default_cc, name: gcc-4.8,   value: gcc-4.8,   container: gcc-4.8 }
-          - key: default_cc
-            name: 'gcc-11 LTO'
-            value: 'gcc-11 -O2 -flto=auto -ffat-lto-objects'
-            container: gcc-11
-            shared: '--disable-shared'
-            # check: true
-          - { key: default_cc, name: clang-14,  value: clang-14,  container: clang-14 }
-          - { key: default_cc, name: clang-13,  value: clang-13,  container: clang-13 }
-          - { key: default_cc, name: clang-12,  value: clang-12,  container: clang-12 }
-          - { key: default_cc, name: clang-11,  value: clang-11,  container: clang-11 }
-          - { key: default_cc, name: clang-10,  value: clang-10,  container: clang-10 }
-          - { key: default_cc, name: clang-9,   value: clang-9,   container: clang-9 }
-          - { key: default_cc, name: clang-8,   value: clang-8,   container: clang-8 }
-          - { key: default_cc, name: clang-7,   value: clang-7,   container: clang-7 }
-          - { key: default_cc, name: clang-6.0, value: clang-6.0, container: clang-6.0 }
-          - { key: default_cc, name: clang-5.0, value: clang-5.0, container: clang-5.0 }
-          - { key: default_cc, name: clang-4.0, value: clang-4.0, container: clang-4.0 }
-          - { key: default_cc, name: clang-3.9, value: clang-3.9, container: clang-3.9 }
-          - key: default_cc
-            name: 'clang-14 LTO'
-            value: 'clang-14 -O2 -flto=auto'
-            container: clang-14
-            shared: '--disable-shared'
-            # check: true
-
-          - { key: crosshost, name: aarch64-linux-gnu,     value: aarch64-linux-gnu, container: crossbuild-essential-arm64 }
-#         - { key: crosshost, name: arm-linux-gnueabi,     value: arm-linux-gnueabi }
-#         - { key: crosshost, name: arm-linux-gnueabihf,   value: arm-linux-gnueabihf }
-#         - { key: crosshost, name: i686-w64-mingw32,      value: i686-w64-mingw32 }
-#         - { key: crosshost, name: powerpc-linux-gnu,     value: powerpc-linux-gnu }
-          - { key: crosshost, name: powerpc64le-linux-gnu, value: powerpc64le-linux-gnu, container: crossbuild-essential-ppc64el }
-          - { key: crosshost, name: s390x-linux-gnu,       value: s390x-linux-gnu, container: crossbuild-essential-s390x }
-          - { key: crosshost, name: x86_64-w64-mingw32,    value: x86_64-w64-mingw32, container: mingw-w64 }
-
-          - { key: append_cc, name: c99,   value: '-std=c99   -Werror=pedantic -pedantic-errors' }
-#         - { key: append_cc, name: c11,   value: '-std=c11   -Werror=pedantic -pedantic-errors' }
-#         - { key: append_cc, name: c17,   value: '-std=c17   -Werror=pedantic -pedantic-errors' }
-          - { key: append_cc, name: c2x,   value: '-std=c2x   -Werror=pedantic -pedantic-errors' }
-          - { key: CXXFLAGS,  name: c++98, value: '-std=c++98 -Werror=pedantic -pedantic-errors -Wno-c++11-long-long' }
-#         - { key: CXXFLAGS,  name: c++11, value: '-std=c++11 -Werror=pedantic -pedantic-errors -Wno-c++11-long-long' }
-#         - { key: CXXFLAGS,  name: c++14, value: '-std=c++14 -Werror=pedantic -pedantic-errors -Wno-c++11-long-long' }
-#         - { key: CXXFLAGS,  name: c++17, value: '-std=c++17 -Werror=pedantic -pedantic-errors -Wno-c++11-long-long' }
-          - { key: CXXFLAGS,  name: c++2a, value: '-std=c++2a -Werror=pedantic -pedantic-errors -Wno-c++11-long-long' }
-
-          - { key: optflags, name: '-O0', value: '-O0 -march=x86-64 -mtune=generic' }
-#         - { key: optflags, name: '-O3', value: '-O3 -march=x86-64 -mtune=generic', check: true }
-
-          - { key: append_configure, name: gmp,                  value: '--with-gmp' }
-          - { key: append_configure, name: jemalloc,             value: '--with-jemalloc' }
-          - { key: append_configure, name: valgrind,             value: '--with-valgrind' }
-          - { key: append_configure, name: 'coroutine=ucontext', value: '--with-coroutine=ucontext' }
-          - { key: append_configure, name: 'coroutine=pthread',  value: '--with-coroutine=pthread' }
-          - { key: append_configure, name: disable-jit-support,  value: '--disable-jit-support' }
-          - { key: append_configure, name: disable-dln,          value: '--disable-dln' }
-          - { key: append_configure, name: disable-rubygems,     value: '--disable-rubygems' }
-
-          - { key: cppflags, name: OPT_THREADED_CODE=1,            value: '-DOPT_THREADED_CODE=1' }
-          - { key: cppflags, name: OPT_THREADED_CODE=2,            value: '-DOPT_THREADED_CODE=2' }
-          - { key: cppflags, name: OPT_THREADED_CODE=3,            value: '-DOPT_THREADED_CODE=3' }
-
-          - { key: cppflags, name: NDEBUG,                         value: '-DNDEBUG' }
-          - { key: cppflags, name: RUBY_DEBUG,                     value: '-DRUBY_DEBUG' }
-#         - { key: cppflags, name: ARRAY_DEBUG,                    value: '-DARRAY_DEBUG' }
-#         - { key: cppflags, name: BIGNUM_DEBUG,                   value: '-DBIGNUM_DEBUG' }
-#         - { key: cppflags, name: CCAN_LIST_DEBUG,                value: '-DCCAN_LIST_DEBUG' }
-#         - { key: cppflags, name: CPDEBUG=-1,                     value: '-DCPDEBUG=-1' }
-#         - { key: cppflags, name: ENC_DEBUG,                      value: '-DENC_DEBUG' }
-#         - { key: cppflags, name: GC_DEBUG,                       value: '-DGC_DEBUG' }
-#         - { key: cppflags, name: HASH_DEBUG,                     value: '-DHASH_DEBUG' }
-#         - { key: cppflags, name: ID_TABLE_DEBUG,                 value: '-DID_TABLE_DEBUG' }
-#         - { key: cppflags, name: RGENGC_DEBUG=-1,                value: '-DRGENGC_DEBUG=-1' }
-#         - { key: cppflags, name: SYMBOL_DEBUG,                   value: '-DSYMBOL_DEBUG' }
-#         - { key: cppflags, name: THREAD_DEBUG=-1,                value: '-DTHREAD_DEBUG=-1' }
-
-#         - { key: cppflags, name: RGENGC_CHECK_MODE,              value: '-DRGENGC_CHECK_MODE' }
-#         - { key: cppflags, name: TRANSIENT_HEAP_CHECK_MODE,      value: '-DTRANSIENT_HEAP_CHECK_MODE' }
-#         - { key: cppflags, name: VM_CHECK_MODE,                  value: '-DVM_CHECK_MODE' }
-
-          - { key: cppflags, name: USE_EMBED_CI=0,                 value: '-DUSE_EMBED_CI=0' }
-          - { key: cppflags, name: USE_FLONUM=0,                   value: '-DUSE_FLONUM=0' }
-#         - { key: cppflags, name: USE_GC_MALLOC_OBJ_INFO_DETAILS, value: '-DUSE_GC_MALLOC_OBJ_INFO_DETAILS' }
-          - { key: cppflags, name: USE_LAZY_LOAD,                  value: '-DUSE_LAZY_LOAD' }
-#         - { key: cppflags, name: USE_RINCGC=0,                   value: '-DUSE_RINCGC=0' }
-#         - { key: cppflags, name: USE_SYMBOL_GC=0,                value: '-DUSE_SYMBOL_GC=0' }
-#         - { key: cppflags, name: USE_THREAD_CACHE=0,             value: '-DUSE_THREAD_CACHE=0' }
-#         - { key: cppflags, name: USE_TRANSIENT_HEAP=0,           value: '-DUSE_TRANSIENT_HEAP=0' }
-#         - { key: cppflags, name: USE_RUBY_DEBUG_LOG=1,           value: '-DUSE_RUBY_DEBUG_LOG=1' }
-
-          - { key: cppflags, name: DEBUG_FIND_TIME_NUMGUESS,       value: '-DDEBUG_FIND_TIME_NUMGUESS' }
-          - { key: cppflags, name: DEBUG_INTEGER_PACK,             value: '-DDEBUG_INTEGER_PACK' }
-#         - { key: cppflags, name: ENABLE_PATH_CHECK,              value: '-DENABLE_PATH_CHECK' }
-
-          - { key: cppflags, name: GC_DEBUG_STRESS_TO_CLASS,       value: '-DGC_DEBUG_STRESS_TO_CLASS' }
-#         - { key: cppflags, name: GC_ENABLE_LAZY_SWEEP=0,         value: '-DGC_ENABLE_LAZY_SWEEP=0' }
-#         - { key: cppflags, name: GC_PROFILE_DETAIL_MEMOTY,       value: '-DGC_PROFILE_DETAIL_MEMOTY' }
-#         - { key: cppflags, name: GC_PROFILE_MORE_DETAIL,         value: '-DGC_PROFILE_MORE_DETAIL' }
-
-#         - { key: cppflags, name: CALC_EXACT_MALLOC_SIZE,         value: '-DCALC_EXACT_MALLOC_SIZE' }
-#         - { key: cppflags, name: MALLOC_ALLOCATED_SIZE_CHECK,    value: '-DMALLOC_ALLOCATED_SIZE_CHECK' }
-
-#         - { key: cppflags, name: IBF_ISEQ_ENABLE_LOCAL_BUFFER,   value: '-DIBF_ISEQ_ENABLE_LOCAL_BUFFER' }
-
-#         - { key: cppflags, name: RGENGC_ESTIMATE_OLDMALLOC,      value: '-DRGENGC_ESTIMATE_OLDMALLOC' }
-#         - { key: cppflags, name: RGENGC_FORCE_MAJOR_GC,          value: '-DRGENGC_FORCE_MAJOR_GC' }
-#         - { key: cppflags, name: RGENGC_OBJ_INFO,                value: '-DRGENGC_OBJ_INFO' }
-#         - { key: cppflags, name: RGENGC_OLD_NEWOBJ_CHECK,        value: '-DRGENGC_OLD_NEWOBJ_CHECK' }
-#         - { key: cppflags, name: RGENGC_PROFILE,                 value: '-DRGENGC_PROFILE' }
-
-#         - { key: cppflags, name: VM_DEBUG_BP_CHECK,              value: '-DVM_DEBUG_BP_CHECK' }
-#         - { key: cppflags, name: VM_DEBUG_VERIFY_METHOD_CACHE,   value: '-DVM_DEBUG_VERIFY_METHOD_CACHE' }
-
-          - { key: cppflags, name: MJIT_FORCE_ENABLE,              value: '-DMJIT_FORCE_ENABLE' }
-          - { key: cppflags, name: YJIT_FORCE_ENABLE,              value: '-DYJIT_FORCE_ENABLE' }
-
-    name: ${{ matrix.entry.name }}
-    runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/ruby/ruby-ci-image:${{ matrix.entry.container || 'clang-14' }}
-      options: --user root
-    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') && !contains(github.event.pull_request.labels.*.name, 'Documentation') }}
-    steps:
-      - run: id
-        working-directory:
-      - run: mkdir build
-        working-directory:
-      - name: setenv
-        run: |
-          echo "${{ matrix.entry.key }}=${{ matrix.entry.value }}" >> $GITHUB_ENV
-          echo "GNUMAKEFLAGS=-sj$((1 + $(nproc --all)))" >> $GITHUB_ENV
-      - uses: actions/checkout@v3
-        with:
-          path: src
-      - uses: actions/cache@v3
-        with:
-          path: src/.downloaded-cache
-          key: downloaded-cache
-      - run: ./autogen.sh
-        working-directory: src
-      - name: Run configure
-        run: >
-          ../src/configure -C ${default_configure} ${append_configure}
-          ${{ matrix.entry.key == 'crosshost' && '--host="${crosshost}"' || '--with-gcc="${default_cc} ${append_cc}"' }}
-          ${{ matrix.entry.shared || '--enable-shared' }}
-      - run: make extract-extlibs
-      - run: make incs
-      - run: make
-      - run: make leaked-globals
-      - run: make test
-      - run: make install
-        if: ${{ matrix.entry.check }}
-      - run: make test-tool
-        if: ${{ matrix.entry.check }}
-      - run: make test-all TESTS='-- ruby -ext-'
-        if: ${{ matrix.entry.check }}
-      - run: make test-spec
-        if: ${{ matrix.entry.check }}
-
-      - uses: k0kubun/action-slack@v2.0.0
-        with:
-          payload: |
-            {
-              "ci": "GitHub Actions",
-              "env": "${{ github.workflow }} / ${{ matrix.entry.name }}",
-              "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
-              "commit": "${{ github.sha }}",
-              "branch": "${{ github.ref }}".split('/').reverse()[0]
-            }
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' }}
-
-defaults:
-  run:
-    working-directory: build
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
deleted file mode 100644
index 2f2c876b15..0000000000
--- a/.github/workflows/macos.yml
+++ /dev/null
@@ -1,98 +0,0 @@
-name: macOS
-on:
-  push:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-
-concurrency:
-  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
-  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
-
-jobs:
-  make:
-    strategy:
-      matrix:
-        test_task: ["check"] # "test-bundler-parallel", "test-bundled-gems"
-        os:
-          - macos-11
-          - macos-12
-      fail-fast: false
-    env:
-      GITPULLOPTIONS: --no-tags origin ${{github.ref}}
-    runs-on: ${{ matrix.os }}
-    if: ${{ !contains(github.event.head_commit.message, '[DOC]') && !contains(github.event.pull_request.labels.*.name, 'Documentation') }}
-    steps:
-      - run: mkdir build
-        working-directory:
-      - name: git config
-        run: |
-          git config --global advice.detachedHead 0
-          git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
-        with:
-          path: src
-      - uses: actions/cache@v3
-        with:
-          path: src/.downloaded-cache
-          key: downloaded-cache
-      - name: Install libraries
-        run: |
-          brew upgrade
-          brew install gmp libffi openssl@1.1 zlib autoconf automake libtool readline
-        working-directory: src
-      - name: Set ENV
-        run: |
-          echo "MAKEFLAGS=-j$((1 + $(sysctl -n hw.activecpu)))" >> $GITHUB_ENV
-      - run: ./autogen.sh
-        working-directory: src
-      - name: Run configure
-        run: ../src/configure -C --disable-install-doc --with-openssl-dir=$(brew --prefix openssl@1.1) --with-readline-dir=$(brew --prefix readline)
-      - run: make incs
-      - run: make prepare-gems
-        if: ${{ matrix.test_task == 'test-bundled-gems' }}
-      - run: make
-      - run: make leaked-globals
-        if: ${{ matrix.test_task == 'check' }}
-      - name: make ${{ matrix.test_task }}
-        run: |
-          make -s ${{ matrix.test_task }} ${TESTS:+TESTS=`echo "$TESTS" | sed 's| |$$/ -n!/|g;s|^|-n!/|;s|$|$$/|'`}
-        timeout-minutes: 40
-        env:
-          RUBY_TESTOPTS: "-q --tty=no"
-          TESTS: ${{ matrix.test_task == 'check' && matrix.skipped_tests || '' }}
-          TEST_BUNDLED_GEMS_ALLOW_FAILURES: ""
-          PRECHECK_BUNDLED_GEMS: "no"
-      - name: make skipped tests
-        run: |
-          make -s test-all TESTS=`echo "$TESTS" | sed 's| |$$/ -n/|g;s|^|-n/|;s|$|$$/|'`
-        env:
-          GNUMAKEFLAGS: ""
-          RUBY_TESTOPTS: "-v --tty=no"
-          TESTS: ${{ matrix.skipped_tests }}
-          PRECHECK_BUNDLED_GEMS: "no"
-        if: ${{ matrix.test_task == 'check' && matrix.skipped_tests != '' }}
-        continue-on-error: ${{ matrix.continue-on-skipped_tests || false }}
-      - uses: k0kubun/action-slack@v2.0.0
-        with:
-          payload: |
-            {
-              "ci": "GitHub Actions",
-              "env": "${{ matrix.os }} / ${{ matrix.test_task }}${{ matrix.configure }}",
-              "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
-              "commit": "${{ github.sha }}",
-              "branch": "${{ github.ref }}".split('/').reverse()[0]
-            }
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' }}
-
-defaults:
-  run:
-    working-directory: build
diff --git a/.github/workflows/mingw.yml b/.github/workflows/mingw.yml
deleted file mode 100644
index 3e6b77c58f..0000000000
--- a/.github/workflows/mingw.yml
+++ /dev/null
@@ -1,160 +0,0 @@
-name: MinGW
-on:
-  push:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-
-concurrency:
-  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
-  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
-
-# Notes:
-# Actions console encoding causes issues, see test-all & test-spec steps
-#
-jobs:
-  make:
-    runs-on: windows-2022
-    name: ${{ github.workflow }} (${{ matrix.msystem }})
-    env:
-      MSYSTEM: ${{ matrix.msystem }}
-      MSYS2_ARCH: x86_64
-      CHOST: "x86_64-w64-mingw32"
-      CFLAGS:   "-march=x86-64 -mtune=generic -O3 -pipe -fstack-protector-strong"
-      CXXFLAGS: "-march=x86-64 -mtune=generic -O3 -pipe"
-      CPPFLAGS: "-D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048"
-      LDFLAGS:  "-pipe -fstack-protector-strong"
-      UPDATE_UNICODE: "UNICODE_FILES=. UNICODE_PROPERTY_FILES=. UNICODE_AUXILIARY_FILES=. UNICODE_EMOJI_FILES=."
-      GITPULLOPTIONS: --no-tags origin ${{github.ref}}
-    strategy:
-      matrix:
-        include:
-          # To mitigate flakiness of MinGW CI, we test only one runtime that newer MSYS2 uses.
-          - msystem: "UCRT64"
-            base_ruby: head
-            test_task: [ "check" ] # to make job names consistent
-      fail-fast: false
-    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') && !contains(github.event.pull_request.labels.*.name, 'Documentation') }}
-    steps:
-      - run: mkdir build
-        working-directory:
-      - name: git config
-        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
-      - uses: actions/checkout@v3
-        with:
-          path: src
-      - uses: actions/cache@v3
-        with:
-          path: src/.downloaded-cache
-          key: downloaded-cache
-      - name: Set up Ruby & MSYS2
-        uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: ${{ matrix.base_ruby }}
-      - name: set env
-        run: |
-          echo "GNUMAKEFLAGS=-j$((2 * NUMBER_OF_PROCESSORS))" >> $GITHUB_ENV
-          echo "TEST_JOBS=$((15 * NUMBER_OF_PROCESSORS / 10))" >> $GITHUB_ENV
-
-      - name: where check
-        run: |
-          # show where
-          mv /c/Windows/System32/libcrypto-1_1-x64.dll /c/Windows/System32/libcrypto-1_1-x64.dll_
-          mv /c/Windows/System32/libssl-1_1-x64.dll    /c/Windows/System32/libssl-1_1-x64.dll_
-          result=true
-          for e in gcc.exe ragel.exe make.exe bison.exe libcrypto-1_1-x64.dll libssl-1_1-x64.dll; do
-            echo '##['group']'$'\033[93m'$e$'\033[m'
-            where $e || result=false
-            echo '##['endgroup']'
-          done
-          $result
-
-      - name: version check
-        run: |
-          # show version
-          result=true
-          for e in gcc ragel make bison "openssl version"; do
-            case "$e" in *" "*) ;; *) e="$e --version";; esac
-            echo '##['group']'$'\033[93m'$e$'\033[m'
-            $e || result=false
-            echo '##['endgroup']'
-          done
-          $result
-
-      - name: autogen
-        run: |
-          ./autogen.sh
-        working-directory: src
-
-      - name: configure
-        run: >
-          ../src/configure --disable-install-doc --prefix=/.
-          --build=$CHOST --host=$CHOST --target=$CHOST
-
-      - name: update
-        run: |
-          make incs
-
-      - name: download gems
-        run: |
-          make update-gems
-
-      - name: make all
-        timeout-minutes: 20
-        run: |
-          make
-
-      - run: make leaked-globals
-
-      - name: make install
-        run: |
-          make DESTDIR=../install install-nodoc
-
-      - name: test
-        timeout-minutes: 5
-        run: |
-          make test
-
-      - name: test-all
-        timeout-minutes: 45
-        run: |
-          # Actions uses UTF8, causes test failures, similar to normal OS setup
-          chcp.com 437
-          make test-all
-        env:
-          RUBY_TESTOPTS: -j${{env.TEST_JOBS}} --retry --job-status=normal --show-skip --timeout-scale=1.5
-          BUNDLER_VERSION:
-
-      - name: test-spec
-        timeout-minutes: 10
-        run: |
-          make test-spec
-
-      - uses: k0kubun/action-slack@v2.0.0
-        with:
-          payload: |
-            {
-              "ci": "GitHub Actions",
-              "env": "${{ github.workflow }} / ${{ matrix.test_task }}",
-              "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
-              "commit": "${{ github.sha }}",
-              "branch": "${{ github.ref }}".split('/').reverse()[0]
-            }
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' }}
-
-defaults:
-  run:
-    working-directory: build
-    shell: sh
diff --git a/.github/workflows/mjit.yml b/.github/workflows/mjit.yml
deleted file mode 100644
index d5d9cecc56..0000000000
--- a/.github/workflows/mjit.yml
+++ /dev/null
@@ -1,97 +0,0 @@
-name: MJIT
-on:
-  push:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-
-concurrency:
-  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
-  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
-
-jobs:
-  make:
-    strategy:
-      matrix:
-        test_task: [ "check" ] # to make job names consistent
-        jit_opts: [ "--mjit", "--mjit-wait" ]
-      fail-fast: false
-    runs-on: ubuntu-latest
-    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') && !contains(github.event.pull_request.labels.*.name, 'Documentation') }}
-    env:
-      TESTOPTS: '-q --tty=no'
-      RUN_OPTS: '--disable-gems ${{ matrix.jit_opts }} --mjit-debug=-ggdb3'
-      GITPULLOPTIONS: --no-tags origin ${{github.ref}}
-    steps:
-      - run: mkdir build
-        working-directory:
-      - 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 libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev bison autoconf ruby
-      - name: git config
-        run: |
-          git config --global advice.detachedHead 0
-          git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
-        with:
-          path: src
-      - uses: actions/cache@v3
-        with:
-          path: src/.downloaded-cache
-          key: downloaded-cache
-      - name: Fixed world writable dirs
-        run: |
-          chmod -v go-w $HOME $HOME/.config
-          sudo chmod -R go-w /usr/share
-          sudo bash -c 'IFS=:; for d in '"$PATH"'; do chmod -v go-w $d; done' || :
-      - name: Set ENV
-        run: |
-          echo "GNUMAKEFLAGS=-j$((1 + $(nproc --all)))" >> $GITHUB_ENV
-      - run: ./autogen.sh
-        working-directory: src
-      - name: Run configure
-        run: ../src/configure -C --disable-install-doc cppflags=-DVM_CHECK_MODE
-      - run: make incs
-      - run: make
-      - run: sudo make -s install
-      - run: sudo apt-get install gdb # used by test / test-all failure
-      - name: Run test
-        run: |
-          ulimit -c unlimited
-          make -s test RUN_OPTS="$RUN_OPTS"
-        timeout-minutes: 60
-      - name: Run test-all
-        run: |
-          ulimit -c unlimited
-          make -s test-all RUN_OPTS="$RUN_OPTS"
-        timeout-minutes: 60
-      - name: Run test-spec
-        run: |
-          ulimit -c unlimited
-          make -s test-spec RUN_OPTS="$RUN_OPTS"
-        timeout-minutes: 60
-      - uses: k0kubun/action-slack@v2.0.0
-        with:
-          payload: |
-            {
-              "ci": "GitHub Actions",
-              "env": "${{ github.workflow }} / ${{ matrix.test_task }} ${{ matrix.jit_opts }}",
-              "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
-              "commit": "${{ github.sha }}",
-              "branch": "${{ github.ref }}".split('/').reverse()[0]
-            }
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' }}
-
-defaults:
-  run:
-    working-directory: build
diff --git a/.github/workflows/spec_guards.yml b/.github/workflows/spec_guards.yml
deleted file mode 100644
index dee882904e..0000000000
--- a/.github/workflows/spec_guards.yml
+++ /dev/null
@@ -1,53 +0,0 @@
-name: Rubyspec Version Guards Check
-
-on:
-  push:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-
-concurrency:
-  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
-  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
-
-jobs:
-  rubyspec:
-    name: Rubyspec
-    runs-on: ubuntu-20.04
-    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') && !contains(github.event.pull_request.labels.*.name, 'Documentation') }}
-    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-2.7
-          - ruby-3.0
-
-    steps:
-      - uses: actions/checkout@v3
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: ${{ matrix.ruby }}
-          bundler: none
-      - run: gem install webrick
-      - run: ruby ../mspec/bin/mspec
-        working-directory: spec/ruby
-      - uses: k0kubun/action-slack@v2.0.0
-        with:
-          payload: |
-            {
-              "ci": "GitHub Actions",
-              "env": "${{ github.workflow }} / rubyspec @ ${{ matrix.ruby }}",
-              "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
-              "commit": "${{ github.sha }}",
-              "branch": "${{ github.ref }}".split('/').reverse()[0]
-            }
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' }}
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
deleted file mode 100644
index de8d9546d2..0000000000
--- a/.github/workflows/ubuntu.yml
+++ /dev/null
@@ -1,130 +0,0 @@
-name: Ubuntu
-on:
-  push:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-
-concurrency:
-  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
-  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
-
-jobs:
-  make:
-    strategy:
-      matrix:
-        test_task: ["check", "test-bundler-parallel", "test-bundled-gems"]
-        os:
-          - ubuntu-20.04
-#         - ubuntu-18.04
-        configure: ["", "cppflags=-DRUBY_DEBUG"]
-        include:
-          - test_task: "check"
-            os: ubuntu-20.04
-            configure: "--host=i686-$OSTYPE"
-          - test_task: "test-all TESTS=--repeat-count=2"
-            os: ubuntu-20.04
-            configure: ""
-      fail-fast: false
-    env:
-      GITPULLOPTIONS: --no-tags origin ${{github.ref}}
-      RUBY_DEBUG: ci
-    runs-on: ${{ matrix.os }}
-    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') && !contains(github.event.pull_request.labels.*.name, 'Documentation') }}
-    steps:
-      - run: mkdir build
-        working-directory:
-      - name: Set ENV
-        env:
-          configure: ${{matrix.configure}}
-        run: |
-          echo "GNUMAKEFLAGS=-j$((1 + $(nproc --all)))" >> $GITHUB_ENV
-          arch=`echo " $configure" | sed '/.* --host=/!d;s///;s/[- ].*//'`
-          echo "SETARCH=${arch:+setarch $arch}" >> $GITHUB_ENV
-      - name: Install libraries
-        run: |
-          set -x
-          arch="${SETARCH##* }"
-          arch=${arch:+:${arch/i[3-6]86/i386}}
-          ${arch:+sudo dpkg --add-architecture ${arch#:}}
-          sudo apt-get update -q || :
-          sudo apt-get install --no-install-recommends -q -y \
-          ${arch:+cross}build-essential${arch/:/-} \
-          libssl-dev${arch} libyaml-dev${arch} libreadline6-dev${arch} \
-          zlib1g-dev${arch} libncurses5-dev${arch} libffi-dev${arch} \
-          bison autoconf ruby
-          sudo apt-get install -q -y pkg-config${arch} || :
-      - name: git config
-        run: |
-          git config --global advice.detachedHead 0
-          git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
-        with:
-          path: src
-      - uses: actions/cache@v3
-        with:
-          path: src/.downloaded-cache
-          key: downloaded-cache
-      - name: Fixed world writable dirs
-        run: |
-          chmod -v go-w $HOME $HOME/.config
-          sudo chmod -R go-w /usr/share
-          sudo bash -c 'IFS=:; for d in '"$PATH"'; do chmod -v go-w $d; done' || :
-      - run: ./autogen.sh
-        working-directory: src
-      - name: Run configure
-        env:
-          arch: ${{matrix.arch}}
-        run: >-
-          $SETARCH ../src/configure -C --disable-install-doc ${{ matrix.configure }}
-          ${arch:+--target=$arch-$OSTYPE}
-      - run: $SETARCH make incs
-      - run: $SETARCH make prepare-gems
-        if: ${{ matrix.test_task == 'test-bundled-gems' }}
-      - run: $SETARCH make
-      - run: $SETARCH make leaked-globals
-        if: ${{ matrix.test_task == 'check' }}
-      - name: Create dummy files in build dir
-        run: |
-          $SETARCH ./miniruby -e '(("a".."z").to_a+("A".."Z").to_a+("0".."9").to_a+%w[foo bar test zzz]).each{|basename|File.write("#{basename}.rb", "raise %(do not load #{basename}.rb)")}'
-        if: ${{ matrix.test_task == 'check' }}
-      - name: make ${{ matrix.test_task }}
-        run: |
-          $SETARCH make -s ${{ matrix.test_task }} ${TESTS:+TESTS=`echo "$TESTS" | sed 's| |$/ -n!/|g;s|^|-n!/|;s|$|$$/|'`}
-        timeout-minutes: 40
-        env:
-          RUBY_TESTOPTS: "-q --tty=no"
-          TESTS: ${{ matrix.test_task == 'check' && matrix.skipped_tests || '' }}
-          TEST_BUNDLED_GEMS_ALLOW_FAILURES: ""
-          PRECHECK_BUNDLED_GEMS: "no"
-      - name: make skipped tests
-        run: |
-          $SETARCH make -s test-all TESTS=`echo "$TESTS" | sed 's| |$/ -n/|g;s|^|-n/|;s|$|$$/|'`
-        env:
-          GNUMAKEFLAGS: ""
-          RUBY_TESTOPTS: "-v --tty=no"
-          TESTS: ${{ matrix.skipped_tests }}
-        if: ${{ matrix.test_task == 'check' && matrix.skipped_tests != '' }}
-      - uses: k0kubun/action-slack@v2.0.0
-        with:
-          payload: |
-            {
-              "ci": "GitHub Actions",
-              "env": "${{ matrix.os }} / ${{ matrix.test_task }}${{ matrix.configure }}",
-              "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
-              "commit": "${{ github.sha }}",
-              "branch": "${{ github.ref }}".split('/').reverse()[0]
-            }
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' }}
-
-defaults:
-  run:
-    working-directory: build
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
deleted file mode 100644
index 0dcc3cd8e7..0000000000
--- a/.github/workflows/windows.yml
+++ /dev/null
@@ -1,138 +0,0 @@
-name: Windows
-on:
-  push:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-
-concurrency:
-  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
-  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
-
-jobs:
-  make:
-    strategy:
-      matrix:
-        include:
-          - vs: 2019
-            os: windows-2019
-            vcvars: '"C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvars64.bat"'
-          # - vs: 2022
-          #   os: windows-2022
-          #   vcvars: '"C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat"'
-      fail-fast: false
-    runs-on: ${{ matrix.os }}
-    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') && !contains(github.event.pull_request.labels.*.name, 'Documentation') }}
-    name: VisualStudio ${{ matrix.vs }}
-    env:
-      GITPULLOPTIONS: --no-tags origin ${{github.ref}}
-      VCVARS: ${{ matrix.vcvars }}
-      PATCH: C:\msys64\usr\bin\patch.exe
-    steps:
-      - run: md build
-        working-directory:
-      - uses: msys2/setup-msys2@v2
-        id: setup-msys2
-        with:
-          update: true
-          install: >-
-            patch
-        if: ${{ matrix.os != 'windows-2019' }}
-      - name: patch path
-        shell: msys2 {0}
-        run: echo PATCH=$(cygpath -wa $(command -v patch)) >> $GITHUB_ENV
-        if: ${{ steps.setup-msys2.outcome == 'success' }}
-      - uses: actions/cache@v3
-        with:
-          path: C:\vcpkg\downloads
-          key: ${{ runner.os }}-vcpkg-download-${{ matrix.os }}-${{ github.sha }}
-          restore-keys: |
-            ${{ runner.os }}-vcpkg-download-${{ matrix.os }}-
-            ${{ runner.os }}-vcpkg-download-
-      - name: Install libraries with vcpkg
-        run: |
-          vcpkg --triplet x64-windows install readline zlib
-      - uses: actions/cache@v3
-        with:
-          path: C:\Users\runneradmin\AppData\Local\Temp\chocolatey
-          key: ${{ runner.os }}-chocolatey-${{ matrix.os }}-${{ github.sha }}
-          restore-keys: |
-            ${{ runner.os }}-chocolatey-${{ matrix.os }}-
-            ${{ runner.os }}-chocolatey-
-      - name: Install libraries with chocolatey
-        run: |
-          # Using Choco-Install for retries, but it doesn't detect failures properly
-          # if you pass multiple package names in a single command.
-          Choco-Install -PackageName openssl
-          Choco-Install -PackageName winflexbison3
-        shell: pwsh
-      - name: git config
-        run: |
-          git config --global core.autocrlf false
-          git config --global core.eol lf
-          git config --global advice.detachedHead 0
-          git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
-        with:
-          path: src
-      - uses: actions/cache@v3
-        with:
-          path: src/.downloaded-cache
-          key: downloaded-cache
-      - name: setup env
-        # %TEMP% is inconsistent with %TMP% and test-all expects they are consistent.
-        # https://github.com/actions/virtual-environments/issues/712#issuecomment-613004302
-        run: |
-          set | C:\msys64\usr\bin\sort > old.env
-          call %VCVARS%
-          set TMP=%USERPROFILE%\AppData\Local\Temp
-          set TEMP=%USERPROFILE%\AppData\Local\Temp
-          set /a TEST_JOBS=(15 * %NUMBER_OF_PROCESSORS% / 10) > nul
-          set | C:\msys64\usr\bin\sort > new.env
-          C:\msys64\usr\bin\comm -13 old.env new.env >> %GITHUB_ENV%
-          del *.env
-      - name: Configure
-        run: >-
-          ../src/win32/configure.bat --disable-install-doc
-          --enable-bundled-libffi
-          --with-opt-dir=C:/vcpkg/installed/x64-windows
-          --with-openssl-dir="C:/Program Files/OpenSSL-Win64"
-      - run: nmake incs
-      - run: nmake extract-extlibs
-      - run: nmake
-        env:
-          YACC: win_bison
-      - run: nmake test
-        timeout-minutes: 5
-      - run: nmake test-all
-        env:
-          RUBY_TESTOPTS: -j${{env.TEST_JOBS}} --job-status=normal
-        timeout-minutes: 60
-        continue-on-error: ${{ matrix.continue-on-error || false }}
-      - run: nmake test-spec
-        timeout-minutes: 10
-        continue-on-error: ${{ matrix.continue-on-error || false }}
-      - uses: k0kubun/action-slack@v2.0.0
-        with:
-          payload: |
-            {
-              "ci": "GitHub Actions",
-              "env": "VS${{ matrix.vs }} / ${{ matrix.test_task || 'check' }}",
-              "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
-              "commit": "${{ github.sha }}",
-              "branch": "${{ github.ref }}".split('/').reverse()[0]
-            }
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' }}
-
-defaults:
-  run:
-    working-directory: build
-    shell: cmd
diff --git a/.github/workflows/yjit-ubuntu.yml b/.github/workflows/yjit-ubuntu.yml
deleted file mode 100644
index cf24e0e46d..0000000000
--- a/.github/workflows/yjit-ubuntu.yml
+++ /dev/null
@@ -1,113 +0,0 @@
-name: YJIT Ubuntu
-on:
-  push:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-
-concurrency:
-  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
-  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
-
-jobs:
-  make:
-    strategy:
-      matrix:
-        test_task: ["check"] # "test-bundler-parallel",
-        os:
-          - ubuntu-20.04
-#         - ubuntu-18.04
-        yjit_opts: [
-          "--yjit",
-          "--yjit --yjit-call-threshold=1",
-        ]
-        configure: ["", "cppflags=-DRUBY_DEBUG"]
-        include:
-          - test_task: "test-all TESTS=--repeat-count=2"
-            os: ubuntu-20.04
-            configure: ""
-            yjit_enable_env: RUBY_YJIT_ENABLE
-          - test_task: "test-bundled-gems"
-            os: ubuntu-20.04
-            configure: "cppflags=-DRUBY_DEBUG"
-            yjit_enable_env: RUBY_YJIT_ENABLE
-      fail-fast: false
-    env:
-      GITPULLOPTIONS: --no-tags origin ${{github.ref}}
-      RUN_OPTS: ${{ matrix.yjit_opts }}
-      RUBY_DEBUG: ci
-    runs-on: ${{ matrix.os }}
-    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') && !contains(github.event.pull_request.labels.*.name, 'Documentation') }}
-    steps:
-      - run: mkdir build
-        working-directory:
-      - 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 libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev bison autoconf ruby
-      - name: git config
-        run: |
-          git config --global advice.detachedHead 0
-          git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
-        with:
-          path: src
-      - uses: actions/cache@v3
-        with:
-          path: src/.downloaded-cache
-          key: downloaded-cache
-      - name: Fixed world writable dirs
-        run: |
-          chmod -v go-w $HOME $HOME/.config
-          sudo chmod -R go-w /usr/share
-          sudo bash -c 'IFS=:; for d in '"$PATH"'; do chmod -v go-w $d; done' || :
-      - name: Set ENV
-        run: |
-          echo "GNUMAKEFLAGS=-j$((1 + $(nproc --all)))" >> $GITHUB_ENV
-      - run: ./autogen.sh
-        working-directory: src
-      - name: Run configure
-        run: ../src/configure -C --disable-install-doc ${{ matrix.configure }}
-      - run: make incs
-      - run: make prepare-gems
-        if: ${{ matrix.test_task == 'test-bundled-gems' }}
-      - run: make
-      - run: make leaked-globals
-        if: ${{ matrix.test_task == 'check' }}
-      - name: Create dummy files in build dir
-        run: |
-          ./miniruby -e '(("a".."z").to_a+("A".."Z").to_a+("0".."9").to_a+%w[foo bar test zzz]).each{|basename|File.write("#{basename}.rb", "raise %(do not load #{basename}.rb)")}'
-        if: ${{ matrix.test_task == 'check' }}
-      - name: Enable YJIT through ENV
-        run: echo "RUBY_YJIT_ENABLE=1" >> $GITHUB_ENV
-        if: ${{ matrix.yjit_enable_env }}
-      - run: make -s ${{ matrix.test_task }} RUN_OPTS="$RUN_OPTS"
-        timeout-minutes: 60
-        env:
-          RUBY_TESTOPTS: "-q --tty=no"
-          TEST_BUNDLED_GEMS_ALLOW_FAILURES: ""
-          PRECHECK_BUNDLED_GEMS: "no"
-      - uses: k0kubun/action-slack@v2.0.0
-        with:
-          payload: |
-            {
-              "ci": "GitHub Actions",
-              "env": "${{ matrix.os }} / ${{ matrix.test_task }}${{ matrix.configure }}",
-              "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
-              "commit": "${{ github.sha }}",
-              "branch": "${{ github.ref }}".split('/').reverse()[0]
-            }
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' }}
-
-defaults:
-  run:
-    working-directory: build
diff --git a/.github/workflows/yjit_asm_tests.yml b/.github/workflows/yjit_asm_tests.yml
deleted file mode 100644
index a7e05066dd..0000000000
--- a/.github/workflows/yjit_asm_tests.yml
+++ /dev/null
@@ -1,38 +0,0 @@
-name: YJIT x86 assembler tests
-
-on:
-  push:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '**.md'
-      - '**.rdoc'
-
-concurrency:
-  group: ${{ github.workflow }} / ${{ startsWith(github.event_name, 'pull') && github.ref_name || github.sha }}
-  cancel-in-progress: ${{ startsWith(github.event_name, 'pull') }}
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') && !contains(github.event.pull_request.labels.*.name, 'Documentation') }}
-    steps:
-      - name: Install dependencies
-        run: |
-          set -x
-          sudo apt-get update -q || :
-          sudo apt-get install --no-install-recommends -q -y build-essential
-      - name: git config
-        run: |
-          git config --global advice.detachedHead 0
-          git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
-        with:
-          path: src
-      - name: Run ASM tests
-        run: ./misc/test_yjit_asm.sh
-        working-directory: src
diff --git a/.gitignore b/.gitignore
index 30ab84f3f4..efc7fd5864 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,30 +4,25 @@
 *.a
 *.bak
 *.bc
-*.bundle
 *.dSYM
 *.dmyh
 *.dylib
 *.elc
 *.i
-*.ii
 *.inc
 *.log
 *.o
 *.obj
 *.old
 *.orig
-*.pch
 *.pdb
-*.rbinc
 *.rej
 *.s
 *.sav
-*.sl
-*.so
 *.swp
 *.yarb
 *~
+.*-*
 .*.list
 .*.time
 .DS_Store
@@ -37,8 +32,6 @@
 .pc
 .ppack
 .svn
-.time
-.ruby-version
 Makefile
 cygruby*.def
 extconf.h
@@ -47,7 +40,6 @@ y.tab.c
 *.gcda
 *.gcno
 *.gcov
-*.vscode
 lcov*.info
 
 # /
@@ -58,11 +50,7 @@ lcov*.info
 /*.pc
 /*.rc
 /*_prelude.c
-/.downloaded-cache
-/.top-enc.mk
-/build*/
 /COPYING.LIB
-/ChangeLog
 /Doxyfile
 /GNUmakefile
 /README.atheos
@@ -72,7 +60,6 @@ lcov*.info
 /archive
 /autom4te*.cache
 /automake
-/benchmark/benchmark-driver
 /beos
 /bmlog-*
 /breakpoints.gdb
@@ -120,17 +107,14 @@ lcov*.info
 /rename2.h
 /repack
 /revision.h
-/revision.tmp
 /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
@@ -141,11 +125,6 @@ lcov*.info
 /web
 /yasmdata.rb
 
-# /bin/
-
-/bin/*.exe
-/bin/*.dll
-
 # /benchmark/
 /benchmark/bm_require.data
 /benchmark/bmx_*.rb
@@ -158,35 +137,27 @@ lcov*.info
 /enc/jis/props.h
 /enc/unicode/data
 
-# /coroutine/
-!/coroutine/**/*.s
-
 # /enc/trans/
 /enc/trans/*.c
 /enc/trans/*.def
 /enc/trans/*.exp
 /enc/trans/*.lib
+/enc/trans/.time
 
 # /exe/
-/exe/goruby
 /exe/ruby
+/exe/.time
 
 # /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/-test-/gems
-/ext/-test-/gems
-
 # /ext/etc/
 /ext/etc/constdefs.h
 
@@ -199,7 +170,6 @@ lcov*.info
 
 # /ext/ripper/
 /ext/ripper/eventids1.c
-/ext/ripper/.eventids2-check
 /ext/ripper/eventids2table.c
 /ext/ripper/ripper.*
 /ext/ripper/ids1
@@ -215,10 +185,6 @@ lcov*.info
 /gems/src
 /gems/*-*
 
-# /lib/
-/lib/ruby/[1-9]*.*
-/lib/ruby/vendor_ruby
-
 # /spec/bundler
 /.rspec_status
 
@@ -228,8 +194,4 @@ lcov*.info
 
 # /win32/
 /win32/*.ico
-
-# MJIT
-/rb_mjit_header.h
-/mjit_config.h
-/include/ruby-*/*/rb_mjit_min_header-*.h
+/win32/.time
diff --git a/.indent.pro b/.indent.pro
new file mode 100644
index 0000000000..6a207a0554
--- /dev/null
+++ b/.indent.pro
@@ -0,0 +1,21 @@
+-bap
+-nbbb
+-nbc
+-br
+-nbs
+-ncdb
+-ce
+-cli0.5
+-ndj
+-ei
+-nfc1
+-i4
+-l120
+-lp
+-npcs
+-psl
+-sc
+-sob
+
+-TID
+-TVALUE
diff --git a/.rspec_parallel b/.rspec_parallel
deleted file mode 100644
index aaff198a32..0000000000
--- a/.rspec_parallel
+++ /dev/null
@@ -1,2 +0,0 @@
---format progress
---format ParallelTests::RSpec::RuntimeLogger --out tmp/parallel_runtime_rspec.log
diff --git a/.travis.yml b/.travis.yml
index f8c66f715e..a9117d190f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,3 @@
-# -*- YAML -*-
 # Copyright (C) 2011 Urabe, Shyouhei.  All rights reserved.
 #
 # This file is  a part of the programming language  Ruby.  Permission is hereby
@@ -6,231 +5,105 @@
 # conditions  mentioned in  the file  COPYING are  met.  Consult  the  file for
 # details.
 
-# We only manage non-amd64 free pipelines.
-# https://docs.travis-ci.com/user/billing-overview/
+# 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: c
+dist: trusty
 
-os: linux
-
-if: commit_message !~ /^\[DOC\]/
-
-dist: focal
-
-git:
-  quiet: true
-
-cache:
-  ccache: true
-  directories:
-    - $HOME/config_2nd
-    - $HOME/.downloaded-cache
+# temporary workaround for https://github.com/travis-ci/travis-ci/issues/8892
+sudo: required
+group: deprecated-2017Q4
 
-env:
-  global:
-    # The tests skipped in `make test-all`.
-    - TEST_ALL_SKIPPED_TESTS=
-    # The tests executed separately by `make test-all`.
-    - TEST_ALL_SEPARATED_TESTS=
-    # Reset timestamps early
-    - _=$(touch NEWS && find . -type f -exec touch -r NEWS {} +)
-    - CONFIGURE_TTY=no
-    - CCACHE_COMPILERCHECK=none
-    - CCACHE_NOCOMPRESS=1
-    - CCACHE_MAXSIZE=512Mi
-    - NPROC="`nproc`"
-    # JOBS and SETARCH are overridden when necessary; see below.
-    - JOBS=-j$((1+${NPROC}))
-    - SETARCH=
-    - RUBY_PREFIX=/tmp/ruby-prefix
-    - GEMS_FOR_TEST='timezone tzinfo'
-    # https://github.com/travis-ci/travis-build/blob/e411371dda21430a60f61b8f3f57943d2fe4d344/lib/travis/build/bash/travis_apt_get_options.bash#L7
-    - travis_apt_get_options='--allow-downgrades --allow-remove-essential --allow-change-held-packages'
-    - travis_apt_get_options="-yq --no-install-suggests --no-install-recommends $travis_apt_get_options"
-    # -O1 is faster than -O3 in our tests.
-    - optflags=-O1
-    # -g0 disables backtraces when SEGV.  Do not set that.
-    - debugflags=-ggdb3
+compiler:
+  - gcc
 
-.org.ruby-lang.ci.matrix-definitions:
+os:
+  - linux
 
-  - &gcc-10
-    compiler: gcc-10
-    before_install:
-      - tool/travis_retry.sh sudo bash -c "rm -rf '${TRAVIS_ROOT}/var/lib/apt/lists/'* && exec apt-get update -yq"
-      - >-
-        tool/travis_retry.sh sudo -E apt-get $travis_apt_get_options install
-        ccache
-        gcc-10
-        g++-10
-        libffi-dev
-        libgdbm-dev
-        libncurses-dev
-        libncursesw5-dev
-        libreadline-dev
-        libssl-dev
-        libyaml-dev
-        openssl
-        zlib1g-dev
-
-  # --------
-
-  - &arm64-linux
-    name: arm64-linux
-    arch: arm64
-    <<: *gcc-10
-
-  - &ppc64le-linux
-    name: ppc64le-linux
-    arch: ppc64le
-    <<: *gcc-10
-
-  - &s390x-linux
-    name: s390x-linux
-    arch: s390x
-    <<: *gcc-10
-
-  - &arm32-linux
-    name: arm32-linux
-    arch: arm64
-    # https://packages.ubuntu.com/focal/crossbuild-essential-armhf
-    compiler: arm-linux-gnueabihf-gcc
-    env:
-      - SETARCH='setarch linux32 --verbose --32bit'
-      # The "TestReadline#test_interrupt_in_other_thread" started failing on arm32
-      # from https://www.travis-ci.com/github/ruby/ruby/jobs/529005145
-      - TEST_ALL_SKIPPED_TESTS=test_interrupt_in_other_thread
-    before_install:
-      - sudo dpkg --add-architecture armhf
-      - tool/travis_retry.sh sudo bash -c "rm -rf '${TRAVIS_ROOT}/var/lib/apt/lists/'* && exec apt-get update -yq"
-      - >-
-        tool/travis_retry.sh sudo -E apt-get $travis_apt_get_options install
-        ccache
-        crossbuild-essential-armhf
-        libc6:armhf
-        libstdc++-10-dev:armhf
-        libffi-dev:armhf
-        libgdbm-dev:armhf
-        libncurses-dev:armhf
-        libncursesw5-dev:armhf
-        libreadline-dev:armhf
-        libssl-dev:armhf
-        linux-libc-dev:armhf
-        zlib1g-dev:armhf
-
-matrix:
-  include:
-    # Build every commit (Allowed Failures):
-    - <<: *arm32-linux
-    # Comment out as the 2nd arm64 pipeline is unstable.
-    # - <<: *arm64-linux
-    - <<: *ppc64le-linux
-    - <<: *s390x-linux
-  allow_failures:
-    # We see multiple errors indicating errors on the Travis environment itself in a short while:
-    # https://app.travis-ci.com/github/ruby/ruby/jobs/544382885
-    # https://app.travis-ci.com/github/ruby/ruby/jobs/544361370
-    # It's not a fault of Ruby's arm32 support but just Travis arm32 seems unsable.
-    - name: arm32-linux
-    # - name: arm64-linux
-    # We see "Some worker was crashed." in about 40% of recent ppc64le-linux jobs
-    # e.g. https://app.travis-ci.com/github/ruby/ruby/jobs/530959548
-    - name: ppc64le-linux
-    # Tentatively disable, because often hungs up **after** all tests
-    # have finished successfully and saving caches.
-    - name: s390x-linux
-  fast_finish: true
+before_install:
+  - "CONFIG_FLAG="
+  - "JOBS=-j`nproc`"
 
 before_script:
-  - . tool/ci_functions.sh
-  - |-
-    if [ -n "${TEST_ALL_SKIPPED_TESTS}" ]; then
-      TEST_ALL_OPTS="${TEST_ALL_OPTS} $(ci_to_excluded_test_opts "${TEST_ALL_SKIPPED_TESTS}")"
-      if [ -z "${TEST_ALL_SEPARATED_TESTS}" ]; then
-        TEST_ALL_SEPARATED_TESTS="${TEST_ALL_SKIPPED_TESTS}"
-      fi
-    fi
-  - |-
-    if [ -n "${TEST_ALL_SEPARATED_TESTS}" ]; then
-      TEST_ALL_OPTS_SEPARATED="$(ci_to_included_test_opts "${TEST_ALL_SEPARATED_TESTS}")"
-    fi
-  - echo TEST_ALL_OPTS="${TEST_ALL_OPTS}" TEST_ALL_OPTS_SEPARATED="${TEST_ALL_OPTS_SEPARATED}"
-  - rm -fr .ext autom4te.cache
-  - |-
-    [ -d ~/.downloaded-cache ] ||
-    mkdir ~/.downloaded-cache
-  - ln -s ~/.downloaded-cache
+  - "echo JOBS=$JOBS"
+  - "uname -a"
+  - "uname -r"
+  - "rm -fr .ext autom4te.cache"
+  - "echo $TERM"
   - "> config.status"
-  - "> .rbconfig.time"
-  - sed -f tool/prereq.status template/Makefile.in common.mk > Makefile
-  - make -s $JOBS up
-  - make -s $JOBS srcs
-  - rm -f config.status Makefile rbconfig.rb .rbconfig.time
-  - |-
-    if [ -d ~/config_2nd ]; then
-      cp -pr ~/config_2nd build
-    else
-      mkdir build
-    fi
-  - mkdir config_1st config_2nd
-  - chmod -R a-w .
-  - chmod -R u+w build config_1st config_2nd
-  - cd build
-  - |-
-    case "$CC" in
-    gcc*)   CC="ccache $CC${GCC_FLAGS:+ }$GCC_FLAGS -fno-diagnostics-color";;
-    clang*) CC="ccache $CC${GCC_FLAGS:+ }$GCC_FLAGS -fno-color-diagnostics";;
-    esac
-  - |-
-    [ ! -f config.cache ] ||
-    [ "$CC" = "`sed -n s/^ac_cv_prog_CC=//p config.cache`" ] ||
-    (set -x; exec rm config.cache)
-  - $SETARCH ../configure -C --disable-install-doc --prefix=$RUBY_PREFIX $CONFIG_FLAG
-  - cp -pr config.cache config.status .ext/include ../config_1st
-  - $SETARCH make reconfig
-  - cp -pr config.cache config.status .ext/include ../config_2nd
-  - (cd .. && exec diff -ru config_1st config_2nd)
-  - chmod u+w ..
-  - rm -rf ~/config_2nd
-  - mv ../config_2nd ~
-  - chmod u-w ..
-  - $SETARCH make -s $JOBS
-  - make -s install
-  - |-
-    [ -z "${GEMS_FOR_TEST}" ] ||
-    $RUBY_PREFIX/bin/gem install --no-document $GEMS_FOR_TEST
-  - echo "raise 'do not load ~/.irbrc in test'" > ~/.irbrc
+  - "sed -f tool/prereq.status Makefile.in common.mk > Makefile"
+  - "make update-config_files"
+  - "make touch-unicode-files"
+  - "make -s $JOBS srcs UNICODE_FILES=."
+  - "requests=; for req in ${RUBYSPEC_PULL_REQUEST//,/ }; do
+      requests=\"$requests +refs/pull/$req/merge:\";
+    done"
+  - "${requests:+git -C spec/ruby -c user.email=none -c user.name=none pull --no-edit origin $requests}"
+  - "${requests:+git -C spec/ruby log --oneline origin/master..@}"
+  - "rm config.status Makefile rbconfig.rb .rbconfig.time"
+  - "mkdir build config_1st config_2nd"
+  - "chmod -R a-w ."
+  - "chmod u+w build config_1st config_2nd"
+  - "cd build"
+  - "../configure -C --disable-install-doc --with-gcc=$CC $CONFIG_FLAG"
+  - "cp -pr config.cache config.status .ext/include ../config_1st"
+  - "make reconfig"
+  - "cp -pr config.cache config.status .ext/include ../config_2nd"
+  - "(cd .. && exec diff -ru config_1st config_2nd)"
+  - "make -s $JOBS"
 
 script:
-  - $SETARCH make -s test -o showflags TESTOPTS="${TESTOPTS=$JOBS -q --tty=no}"
-  - ../tool/travis_wait.sh $SETARCH make -s test-all -o exts TESTOPTS="$JOBS -q --tty=no ${TEST_ALL_OPTS}" RUBYOPT="-w"
-  # Run the failing tests separately returning ok status to check if it works,
-  # visualize them.
-  - |
-    if [ -n "${TEST_ALL_OPTS_SEPARATED}" ]; then
-      $SETARCH make -s test-all -o exts TESTOPTS="$JOBS -v --tty=no ${TEST_ALL_OPTS_SEPARATED}" RUBYOPT="-w" || :
-    fi
-  - $SETARCH make -s test-spec MSPECOPT=-ff # not using `-j` because sometimes `mspec -j` silently dies
-  - $SETARCH make -s -o showflags leaked-globals
-
-# We enable Travis on the specific branches or forked repositories here.
-if: (repo = ruby/ruby AND (branch = master OR branch =~ /^ruby_\d_\d$/)) OR repo != ruby/ruby
+  - "make -s test TESTOPTS=--color=never"
+  - "make -s $JOBS test-all -o exts TESTOPTS='-q --color=never --job-status=normal'"
+  - "make -s $JOBS test-spec MSPECOPT=-j"
+
+# Branch matrix.  Not all branches are Travis-ready so we limit branches here.
+branches:
+  only:
+    - trunk
+    - ruby_2_2
+    - ruby_2_3
+    - ruby_2_4
+    - ruby_2_5
+    - /^feature\//
+    - /^bug\//
 
 # We want to be notified when something happens.
 notifications:
   irc:
     channels:
       - "chat.freenode.net#ruby-core"
+      - "chat.freenode.net#ruby-ja"
     on_success: change # [always|never|change] # default: always
     on_failure: always # [always|never|change] # default: always
     template:
       - "%{message} by @%{author}: See %{build_url}"
 
-  webhooks:
-    urls:
-      - secure: mRsoS/UbqDkKkW5p3AEqM27d4SZnV6Gsylo3bm8T/deltQzTsGzZwrm7OIBXZv0UFZdE68XmPlyHfZFLSP2V9QZ7apXMf9/vw0GtcSe1gchtnjpAPF6lYBn7nMCbVPPx9cS0dwL927fjdRM1vj7IKZ2bk4F0lAJ25R25S6teqdk= # ruby-lang slack: ruby/simpler-alerts-bot (travis)
-    on_success: never
+  slack:
+    rooms:
+      - secure: i1GLETSKye85ea6dGNA3MxI/5myChmMFiZtBd5C69xK+s1sBFqEgOSbaSf9KHc0CYrHVyNhQMaZRruieV7xS+6Pfs0Zvxf1DO6QQTWC2KhkqwFDLvZncAzjoyASdR90hbr+iRPOngQ+HJuE94zemALAwEqNAinzA74PMiJXktqY= # ruby:<token>#commits
+      - secure: ah7UEHBvncXT7bM5mvYIQAO+tIyV/wl7nXLb7wQD16dO2v8Gragy0mWjB79Q09hrrMGmp6H9bCDpdGS80boIA5EHaHoG4QaP0i9bsSt8U2AMWgZtfyIgQKJ4H2kXkGlrjO+AXTgnIkP7LNjdgAVUUTGQPb26T3QmoN2Splt+fIQ= # ruby:<token>#alerts
+    on_pull_requests: false
+    on_success: change
     on_failure: always
 
   email:
-    - jaruga@ruby-lang.org
+    - ko1c-failure@atdot.net
+
+# 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 66d93598aa..a009caefea 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 7363c106a2..ffdf2dd4b8 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,5 +1,4 @@
-Please see the [official issue tracker], [doc/contributing.rdoc] and wiki [HowToContribute].
+Please see the [official issue tracker] and wiki [HowToContribute].
 
 [official issue tracker]: https://bugs.ruby-lang.org
-[doc/contributing.rdoc]: contributing.rdoc
 [HowToContribute]: https://bugs.ruby-lang.org/projects/ruby/wiki/HowToContribute
diff --git a/COPYING b/COPYING
index 48e5a96de7..f06056fb45 100644
--- a/COPYING
+++ b/COPYING
@@ -2,55 +2,55 @@ 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 230376bc60..e50d01c8d1 100644
--- a/COPYING.ja
+++ b/COPYING.ja
@@ -2,50 +2,50 @@
 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/LEGAL b/LEGAL
index 9645728efe..0479751691 100644
--- a/LEGAL
+++ b/LEGAL
@@ -1,248 +1,159 @@
-# -*- rdoc -*-
-
-= LEGAL NOTICE INFORMATION
---------------------------
+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.
 
-[addr2line.c]
-
-  A part of this file is from FreeBSD.
-
-  >>>
-    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
-
-
-[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-label:label-MIT+License].
-
-[coroutine]
-
-  Unless otherwise specified, these files are licensed under the
-  {MIT License}[rdoc-label:label-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.
+ccan/build_assert/build_assert.h
+ccan/check_type/check_type.h
+ccan/container_of/container_of.h
+ccan/str/str.h
 
-  Oniguruma LICENSE
+  These files are licensed under the CC0.
 
-  >>>
-    Copyright (c) 2002-2009::  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
-    All rights reserved.
+    https://creativecommons.org/choose/zero/
 
-    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.
+ccan/list/list.h
 
-    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/
+  This file is licensed under the MIT License.
 
-    When this software is partly used or it is distributed with Ruby,
-    this of Ruby follows the license of Ruby.
+    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:
 
-[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.
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
 
-    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.
+    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/onigmo.h:
+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
+
+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/trans/GB/GB12345%UCS.src:
+enc/trans/GB/UCS%GB12345.src:
+enc/trans/GB/GB2312%UCS.src:
+enc/trans/GB/UCS%GB2312.src:
 
-  >>>
     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.
@@ -250,82 +161,56 @@ mentioned below.
     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]
+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]
+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.
 
-  >>>
-    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:
 
-[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]
+ 	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.
 
-  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]
+configure:
 
   This file is free software.
 
-  >>>
-    Copyright (C) 1992-1996, 1998-2012:: Free Software Foundation, Inc.
+    Copyright (C) 1992, 93, 94, 95, 96 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 1992-2018:: Free Software Foundation, Inc.
+      Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
+      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 3 of the License, or
+    the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful, but
@@ -334,85 +219,54 @@ mentioned below.
     General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program; if not, see <https://www.gnu.org/licenses/>.
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
     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.  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.
+    the same distribution terms that you use for the rest of that program.
 
-  >>>
-    Copyright (c) Ryan Davis, seattle.rb
+parse.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.
-
-[parse.c]
-[parse.h]
-
-  These files are licensed under the GPL, but are incorporated into Ruby and
+  This file is licensed under the GPL, but is 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, 2000-2015, 2018:: Free Software Foundation, Inc.
+     Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
+     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 3 of the License, 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 2, 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, see <http://www.gnu.org/licenses/>.
+     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.  */
 
-    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.  */
 
-[missing/dtoa.c]
+util.c (partly):
 
-  This file is under these licenses.
-
-  >>>
-    Copyright (c) 1991, 2000, 2001:: by Lucent Technologies.
+    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
@@ -425,74 +279,71 @@ mentioned below.
     REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
     OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
 
-  >>>
-    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]
+win32/win32.[ch]:
 
   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.
 
-[missing/mt19937.c]
+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
 
   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
@@ -513,13 +364,12 @@ mentioned below.
 
   The Wayback Machine url: http://web.archive.org/web/19990429082237/http://www.math.keio.ac.jp/matumoto/emt.html
 
-[missing/procstat_vm.c]
+vm_dump.c:procstat_vm
 
   This file is under the new-style BSD license.
 
-  >>>
-    Copyright (c) 2007:: Robert N. M. Watson
-                         All rights reserved.
+    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
@@ -544,65 +394,146 @@ mentioned below.
 
     $FreeBSD: head/usr.bin/procstat/procstat_vm.c 261780 2014-02-11 21:57:37Z jhb $
 
-[vsnprintf.c]
+vsnprintf.c:
 
-  This file is under the {old-style BSD license}[rdoc-label:label-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 (c) 1990, 1993::
-    The Regents of the University of California.  All rights reserved.
+    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]
+    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.
+
+st.c:
+strftime.c:
+include/ruby/st.h:
+missing/acosh.c:
+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/strerror.c:
+missing/strstr.c:
+missing/tgamma.c:
+ext/date/date_strftime.c:
+ext/digest/sha1/sha1.[ch]:
+ext/sdbm/_sdbm.c:
+ext/sdbm/sdbm.h:
 
   These files are all under public domain.
 
-[missing/crypt.c]
+missing/crypt.c:
 
-  This file is under the {old-style BSD license}[rdoc-label:label-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 (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.
 
-[missing/setproctitle.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.
 
-  This file is under the {old-style BSD license}[rdoc-label:label-Old-style+BSD+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.
+
+missing/setproctitle.c
 
-  >>>
-    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.
+  This file is under the old-style BSD license.  Note that the
+  paragraph 3 below is now null and void.
 
-[missing/strlcat.c]
-[missing/strlcpy.c]
+    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.
+
+    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/strlcat.c
+missing/strlcpy.c
 
   These files are under an ISC-style license.
 
-  >>>
-    Copyright (c) 1998, 2015:: Todd C. Miller <Todd.Miller@courtesan.com>
+    Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
 
     Permission to use, copy, modify, and distribute this software for any
     purpose with or without fee is hereby granted, provided that the above
@@ -616,26 +547,23 @@ mentioned below.
     ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
-[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.c]
-[ext/digest/md5/md5.h]
+ext/digest/md5/md5.[ch]:
 
   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
@@ -656,27 +584,23 @@ mentioned below.
     L. Peter Deutsch
     ghost@aladdin.com
 
-[ext/digest/rmd160/rmd160.c]
-[ext/digest/rmd160/rmd160.h]
+ext/digest/rmd160/rmd160.[ch]:
 
   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.c]
-[ext/digest/sha2/sha2.h]
+ext/digest/sha2/sha2.[ch]:
 
   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
@@ -702,123 +626,96 @@ mentioned below.
     OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     SUCH DAMAGE.
 
-[ext/json/generator/generator.c]
+ext/json/generator/generator.c:
 
-  The file contains the following copyright notice.
+    Copyright 2001-2004 Unicode, Inc.
 
-  >>>
-    Copyright 2001-2004:: Unicode, Inc.
+    Disclaimer
 
-    Disclaimer::
+    This source code is provided as is by Unicode, Inc. No claims are
+    made as to fitness for any particular purpose. No warranties of any
+    kind are expressed or implied. The recipient agrees to determine
+    applicability of information provided. If this file has been
+    purchased on magnetic or optical media from Unicode, Inc., the
+    sole remedy for any claim will be exchange of defective media
+    within 90 days of receipt.
 
-      This source code is provided as is by Unicode, Inc. No claims are
-      made as to fitness for any particular purpose. No warranties of any
-      kind are expressed or implied. The recipient agrees to determine
-      applicability of information provided. If this file has been
-      purchased on magnetic or optical media from Unicode, Inc., the
-      sole remedy for any claim will be exchange of defective media
-      within 90 days of receipt.
+    Limitations on Rights to Redistribute This Code
 
-    Limitations on Rights to Redistribute This Code::
+    Unicode, Inc. hereby grants the right to freely use the information
+    supplied in this file in the creation of products supporting the
+    Unicode Standard, and to make copies of this file in any form
+    for internal or external distribution as long as this notice
+    remains attached.
 
-      Unicode, Inc. hereby grants the right to freely use the information
-      supplied in this file in the creation of products supporting the
-      Unicode Standard, and to make copies of this file in any form
-      for internal or external distribution as long as this notice
-      remains attached.
-
-[ext/nkf/nkf-utf8/config.h]
-[ext/nkf/nkf-utf8/nkf.c]
-[ext/nkf/nkf-utf8/utf8tbl.c]
+ext/nkf/nkf-utf8/config.h:
+ext/nkf/nkf-utf8/nkf.c:
+ext/nkf/nkf-utf8/utf8tbl.c:
 
   These files are under the following license.  So to speak, it is
   copyrighted semi-public-domain software.
 
-  >>>
-    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.
-
-[ext/psych]
-[test/psych]
-
-  The files under these directories are under the following license, except for
-  ext/psych/yaml.
-
-  >>>
-    Copyright 2009:: Aaron Patterson, et al.
-
-    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/psych/yaml]
-
-  The files under this directory are under the following license.
-
-  >>>
-    Copyright (c) 2006:: Kirill Simonov
-
-    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]
+    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.
+
+ext/psych:
+test/psych:
+
+  Copyright 2009 Aaron Patterson, et al.
+
+  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/psych/yaml:
+
+  Copyright (c) 2006 Kirill Simonov
+
+  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/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
@@ -845,16 +742,15 @@ mentioned below.
     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
@@ -863,17 +759,16 @@ mentioned below.
 
   The Wayback Machine url: http://web.archive.org/web/19970607104352/http://www.activeware.com:80/
 
-[lib/rdoc/generator/template/darkfish/css/fonts.css]
+lib/rdoc/generator/template/darkfish/css/fonts.css:
 
-  This file is licensed under the {SIL Open Font License}[http://scripts.sil.org/OFL].
+  This file is licensed under the SIL Open Font License.
 
-[spec/mspec]
-[spec/ruby]
+    http://scripts.sil.org/OFL
 
-  The files under these directories are under the following license.
+spec/mspec:
+spec/ruby:
 
-  >>>
-    Copyright (c) 2008:: Engine Yard, Inc. All rights reserved.
+    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
@@ -896,216 +791,60 @@ mentioned below.
     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-label:label-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]
+lib/rubygems.rb:
+lib/rubygems:
+test/rubygems:
 
-  Bundler 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 (see the file MIT.txt), or the
+  conditions below:
 
-  >>>
-    Portions copyright (c) 2010:: Andre Arko
-    Portions copyright (c) 2009:: Engine Yard
+  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.
 
-    {MIT License}[rdoc-label:label-MIT+License]
+  2. You may modify your copy of the software in any way, provided that
+     you do at least ONE of the following:
 
-[lib/bundler/vendor/thor]
+     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.
 
-  Thor is under the following license.
+     b. use the modified software only within your corporation or
+        organization.
 
-  >>>
-    Copyright (c) 2008 Yehuda Katz, Eric Hodel, et al.
+     c. give non-standard executables non-standard names, with
+        instructions on where to get the original software distribution.
 
-    {MIT License}[rdoc-label:label-MIT+License]
+     d. make other distribution arrangements with the author.
 
-[lib/rubygems/resolver/molinillo]
-[lib/bundler/vendor/molinillo]
+  3. You may distribute the software in object code or executable
+     form, provided that you do at least ONE of the following:
 
-  molinillo is under the following license.
+     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.
 
-  >>>
-    Copyright (c) 2014 Samuel E. Giddins segiddins@segiddins.me
+     b. accompany the distribution with the machine-readable source of
+        the software.
 
-    {MIT License}[rdoc-label:label-MIT+License]
+     c. give non-standard executables non-standard names, with
+        instructions on where to get the original software distribution.
 
-[lib/bundler/vendor/connection_pool]
+     d . make other distribution arrangements with the author.
 
-  connection_pool is under the following license.
+  4. You may modify and include the part of the software into any other
+     software (possibly commercial).
 
-  >>>
-    Copyright (c) 2011 Mike Perham
+  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.
 
-    {MIT License}[rdoc-label:label-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-label:label-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-label:label-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-label:label-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.
+  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/Makefile.in b/Makefile.in
new file mode 100644
index 0000000000..25075f5900
--- /dev/null
+++ b/Makefile.in
@@ -0,0 +1,531 @@
+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
+ACLOCAL = aclocal
+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@
+XCFLAGS = @XCFLAGS@
+CPPFLAGS = @CPPFLAGS@ $(INCFLAGS)
+LDFLAGS = @STATIC@ $(CFLAGS) @LDFLAGS@
+EXTLDFLAGS = @EXTLDFLAGS@
+XLDFLAGS = @XLDFLAGS@ $(EXTLDFLAGS)
+EXTLIBS =
+LIBS = @LIBS@ $(EXTLIBS)
+MISSING = @LIBOBJS@ @ALLOCA@
+ENABLE_SHARED = @ENABLE_SHARED@
+LDSHARED = @LIBRUBY_LDSHARED@
+DLDFLAGS = @LIBRUBY_DLDFLAGS@ $(XLDFLAGS) $(ARCH_FLAG)
+SOLIBS = @SOLIBS@
+ENABLE_DEBUG_ENV = @ENABLE_DEBUG_ENV@
+MAINLIBS = @MAINLIBS@
+ARCHMINIOBJS = @MINIOBJS@
+DLNOBJ = @DLNOBJ@
+ENCOBJS = @ENCOBJS@
+EXTOBJS = @EXTOBJS@
+BUILTIN_ENCOBJS = @BUILTIN_ENCOBJS@
+BUILTIN_TRANSSRCS = @BUILTIN_TRANSSRCS@
+BUILTIN_TRANSOBJS = @BUILTIN_TRANSOBJS@
+POSTLINK = @POSTLINK@
+
+RUBY_BASE_NAME=@RUBY_BASE_NAME@
+RUBY_PROGRAM_VERSION=@RUBY_PROGRAM_VERSION@
+RUBY_API_VERSION=@RUBY_API_VERSION@
+RUBY_INSTALL_NAME=@RUBY_INSTALL_NAME@
+RUBY_SO_NAME=@RUBY_SO_NAME@
+EXEEXT = @EXEEXT@
+LIBEXT = @LIBEXT@
+PROGRAM=$(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@
+RUBY_PROGRAM_VERSION = @RUBY_PROGRAM_VERSION@
+
+LIBRUBY_A     = @LIBRUBY_A@
+LIBRUBY_SO    = @LIBRUBY_SO@
+LIBRUBY_SONAME= @LIBRUBY_SONAME@
+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       = @ARFLAGS@$(empty)
+RANLIB        = @RANLIB@
+AS            = @AS@
+ASFLAGS       = @ASFLAGS@ $(INCFLAGS)
+IFCHANGE      = $(srcdir)/tool/ifchange
+SET_LC_MESSAGES = env LC_MESSAGES=C
+OBJDUMP       = @OBJDUMP@
+OBJCOPY       = @OBJCOPY@
+HAVE_GIT      = @HAVE_GIT@
+GIT           = @GIT@
+VCS           = @VCS@
+VCSUP         = @VCSUP@
+DTRACE        = @DTRACE@ @DTRACE_OPT@
+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
+SOEXT         = @SOEXT@
+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
+
+MAINSRC = $(MAINOBJ:@OBJEXT@=c)
+
+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) $(OUTFLAG)$@
+		$(Q) $(POSTLINK)
+
+$(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
+
+verify-static-library: $(LIBRUBY_A)
+		$(ECHO) verifying static-library $@
+		@$(PURIFY) $(CC) $(LDFLAGS) $(XLDFLAGS) $(MAINOBJ) $(LIBRUBY_A) $(MAINLIBS) $(EXTLIBS) $(LIBS) $(OUTFLAG)conftest$(EXEEXT)
+		@$(RMALL) conftest$(EXEEXT) conftest.c conftest.dSYM
+
+$(LIBRUBY_SO):
+		@-$(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_*' -L '$(SYMBOL_PREFIX)*_ec_*' $@
+		$(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
+
+ruby-runner.h: template/ruby-runner.h.in
+		@./config.status --file=$@:$(srcdir)/template/$(@F).in
+
+$(RBCONFIG): $(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$$' >/dev/null 2>&1 || \
+		{ echo "$@ updated, restart."; exit 1; }
+
+uncommon.mk: $(srcdir)/common.mk
+		sed 's/{\$$([^(){}]*)[^{}]*}//g' $< > $@
+
+.PHONY: reconfig
+reconfig-args = $(srcdir)/$(CONFIGURE) $(configure_args)
+config.status-args = ./config.status --recheck
+reconfig-exec-0 = test -t 1 && { CONFIGURE_TTY=yes; export CONFIGURE_TTY; }; exec 3>&1; exit `exec 4>&1; { "$$@" 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.ac $(srcdir)/aclocal.m4
+	$(CHDIR) $(srcdir) && exec $(AUTOCONF) -o $(@F)
+
+$(srcdir)/aclocal.m4:
+	$(CHDIR) $(srcdir) && \
+	type $(ACLOCAL) >/dev/null 2>&1 && exec $(ACLOCAL); \
+	touch $(@F)
+
+prereq: $(srcdir)/$(CONFIGURE)
+
+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 -p -j1 -i 1 -g -o -t -N rb_reserved_word -k1,3,$$ $? \
+	  | sed -f $(srcdir)/tool/gperf.sed \
+	  > $@.tmp && \
+	  $(MV) $@.tmp $@ && \
+	  $(CP) $? $(srcdir)/defs/lex.c.src && \
+	  $(CP) $@ $(srcdir)/lex.c.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
+
+$(srcdir)/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 -f $(srcdir)/tool/gperf.sed > $@ && \
+	  $(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/RUBY_PROBES_H/' -e 's/(char \*/(const char */g' -e 's/, char \*/, const char */g' $@.tmp > $@
+	$(Q) $(RM) $@.tmp
+
+.dmyh.h:
+	@$(ECHO) making dummy $(DEST_FILE)
+	$(Q)echo '#include "$(*F).dmyh"' > $@
+
+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)
+	-$(Q)$(RMALL) exe/ ruby-runner.h *.dSYM
+
+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
+
+ext/clean.sub gems/clean.sub:: ext/clean.mk
+ext/distclean.sub gems/distclean.sub:: ext/distclean.mk
+ext/realclean.sub gems/realclean.sub:: ext/realclean.mk
+
+ext/clean.mk ext/distclean.mk ext/realclean.mk::
+	-$(Q) if [ -f $(EXTS_MK) ]; then exec $(MAKE) -f $(EXTS_MK) $(@F:.mk=); fi
+
+ext/clean:: ext/clean.sub
+ext/distclean:: ext/distclean.sub
+ext/realclean:: ext/realclean.sub
+gems/clean:: gems/clean.sub
+gems/distclean:: gems/distclean.sub
+gems/realclean:: gems/realclean.sub
+
+ext/clean.sub ext/distclean.sub ext/realclean.sub \
+gems/clean.sub gems/distclean.sub gems/realclean.sub::
+	$(Q) set dummy `echo "${EXTS}" | tr , ' '`; shift; \
+	test "$$#" = 0 && set .; \
+	set dummy `\
+	    cd $(@D) 2>/dev/null && \
+	    find "$$@" \( -name Makefile -o -name exts.mk \) -print | \
+	    sed -n 's:^\./::;s:^:$(@D)/:;s:/[^/][^/]*$$::p' | sort -u; \
+	`; shift; \
+	for dir do \
+	    $(RM) "$$dir/exts.mk"; \
+	    if [ -f "$$dir/Makefile" ]; then \
+		echo $(@F:.sub=)ing "$$dir"; \
+		(cd "$$dir" && exec $(MAKE) $(mflags) $(@F:.sub=)); \
+	    fi; \
+	done || true
+
+ext/distclean ext/realclean gems/distclean gems/realclean::
+	$(Q) set dummy `echo "${EXTS}" | tr , ' '`; shift; \
+	test "$$#" = 0 && set .; \
+	cd $(@D) 2>/dev/null && \
+	find "$$@" -type d -empty -exec $(RMDIRS) {} + 2> /dev/null || true
+	$(Q) $(RMDIRS) $(@D) 2> /dev/null || true
+
+clean-enc distclean-enc realclean-enc:
+	@test -f "$(ENC_MK)" || exit 0; \
+	echo $(@:-enc=ing) encodings; \
+	exec $(MAKE) $(MAKE_ENC) $(@:-enc=)
+
+ext/extinit.$(OBJEXT): ext/extinit.c $(SETUP)
+	$(ECHO) compiling $@
+	$(Q) $(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -c ext/extinit.c
+
+enc/encinit.$(OBJEXT): enc/encinit.c $(SETUP)
+
+test-bundled-gems-run:
+	$(Q) set -e; while read gem _; do \
+	  echo testing $$gem gem && \
+	  $(XRUBY) -C $(srcdir)/gems/src/$$gem -Ilib ../../../.bundle/bin/rake; \
+	done < $(srcdir)/gems/bundled_gems
+
+update-src::
+	@$(CHDIR) "$(srcdir)" && LC_TIME=C exec $(VCSUP)
+
+update-download:: update-config_files
+
+after-update:: prereq
+
+gcov:
+	$(Q) $(BASERUBY) $(srcdir)/tool/run-gcov.rb
+
+lcov:
+	$(Q) $(BASERUBY) $(srcdir)/tool/run-lcov.rb
+
+update-doclie:
+	$(Q) $(srcdir)/tool/git-refresh -C $(srcdir)/coverage $(Q1:0=-q) \
+		--branch $(DOCLIE_GIT_REF) \
+		$(DOCLIE_GIT_URL) doclie $(GIT_OPTS)
+
+update-simplecov-html:
+	$(Q) $(srcdir)/tool/git-refresh -C $(srcdir)/coverage $(Q1:0=-q) \
+		--branch $(SIMPLECOV_HTML_GIT_REF) \
+		$(SIMPLECOV_HTML_GIT_URL) simplecov-html $(GIT_OPTS)
+
+update-simplecov:
+	$(Q) $(srcdir)/tool/git-refresh -C $(srcdir)/coverage $(Q1:0=-q) \
+		--branch $(SIMPLECOV_GIT_REF)  \
+		$(SIMPLECOV_GIT_URL) simplecov $(GIT_OPTS)
+
+update-coverage: update-simplecov update-simplecov-html update-doclie
+
+INSNS	= opt_sc.inc optinsn.inc optunifs.inc insns.inc insns_info.inc \
+	  vmtc.inc vm.inc
+
+$(INSNS): $(srcdir)/insns.def vm_opts.h \
+	  $(srcdir)/defs/opt_operand.def $(srcdir)/defs/opt_insn_unif.def \
+	  $(srcdir)/tool/instruction.rb $(srcdir)/tool/insns2vm.rb
+	$(ECHO) generating $@
+	$(Q) $(BASERUBY) -Ku $(srcdir)/tool/insns2vm.rb $(INSNS2VMOPT) $@
+
+verconf.h: $(RBCONFIG)
+
+loadpath: verconf.h
+	@$(CPP) $(XCFLAGS) $(CPPFLAGS) $(srcdir)/loadpath.c | \
+	sed -e '1,/^const char ruby_initial_load_paths/d;/;/,$$d' \
+	    -e '/^ /!d;s/ *"\\0"$$//;s/" *"//g'
+
+un-runnable:
+	$(ECHO) cannot make runnable, configure with --enable-load-relative.
+	$(Q) exit 1
diff --git a/NEWS b/NEWS
new file mode 100644
index 0000000000..e1b91f38b7
--- /dev/null
+++ b/NEWS
@@ -0,0 +1,577 @@
+# -*- rdoc -*-
+
+= NEWS for Ruby 2.5.0
+
+This document is a list of user visible feature changes made between
+releases except for bug fixes.
+
+Note that each entry is kept so brief that no reason behind or
+reference information is supplied with.  For a full list of changes
+with all sufficient information, see the ChangeLog file or Redmine
+(e.g. <tt>https://bugs.ruby-lang.org/issues/$FEATURE_OR_BUG_NUMBER</tt>)
+
+== Changes since the 2.4.0 release
+
+=== Language changes
+
+* Top-level constant look-up is removed.  [Feature #11547]
+
+* rescue/else/ensure are allowed inside do/end blocks.  [Feature #12906]
+
+* refinements take place in string interpolations.  [Feature #13812]
+
+=== Core classes updates (outstanding ones only)
+
+* Array
+
+  * New methods:
+
+    * Array#append  [Feature #12746]
+    * Array#prepend  [Feature #12746]
+
+* Data
+
+  * Is deprecated. It was a base class for C extensions, and it's not
+    necessary to expose in Ruby level. [Feature #3072]
+
+* Exception
+
+  * New methods:
+
+    * Exception#full_message to retrieve a String expression of an exception,
+      formatted in the same way in which Ruby prints out an uncaught exception.
+      [Feature #14141] [experimental]
+
+* Dir
+
+  * Dir.glob provides new optional keyword argument, :base.
+    [Feature #13056]
+  * Dir.chdir (without block arg), Dir.open, Dir.new, Dir.mkdir, Dir.rmdir,
+    Dir.empty? releases GVL
+
+  * New methods:
+
+    * Dir.children  [Feature #11302]
+    * Dir.each_child  [Feature #11302]
+
+* Enumerable
+
+  * Enumerable#{any?,all?,none?,one?} accept a pattern argument [Feature #11286]
+
+* File
+
+  * File.open accepts :newline option to imply text mode.  [Bug #13350]
+  * File#path raises an IOError for files opened with
+    File::Constants::TMPFILE option. [Feature #13568]
+  * File.stat, File.exist?, and other rb_stat()-using methods release GVL
+    [Bug #13941]
+  * File.rename releases GVL [Feature #13951]
+  * File::Stat#{atime,mtime,ctime} support fractional second timestamps on
+    Windows 8 and later  [Feature #13726]
+  * File::Stat#ino and File.indentical? support ReFS 128bit ino on Windows 8.1
+    and later  [Feature #13731]
+  * File.readable?, File.readable_real?, File.writable?, File.writable_real?,
+    File.executable?, File.executable_real?, File.mkfifo, File.readlink,
+    File.truncate, File#truncate, File.chmod, File.lchmod, File.chown,
+    File.lchown, File.unlink, File.utime, File.lstat release GVL
+
+  * New method:
+
+    * File.lutime  [Feature #4052]
+
+* Exception
+
+  * Exception#full_message takes :highlight and :order options [Bug #14324]
+
+* Hash
+
+  * New methods:
+
+    * Hash#transform_keys  [Feature #13583]
+    * Hash#transform_keys!  [Feature #13583]
+    * Hash#slice  [Feature #8499]
+
+* IO
+
+  * IO#copy_stream tries copy offload with copy_file_range(2) [Feature #13867]
+
+  * New methods:
+
+    * IO#pread  [Feature #4532]
+    * IO#pwrite  [Feature #4532]
+    * IO#write accepts multiple arguments  [Feature #9323]
+
+* IOError
+
+  * IO#close might raise an error with message "stream closed",
+    but it is refined to "stream closed in another thread". The new message
+    is more clear for user.
+    [Bug #13405]
+
+* Integer
+
+  * Integer#step no longer hides errors from coerce method when
+    given a step value which cannot be compared with #> to 0.
+    [Feature #7688]
+  * Integer#{round,floor,ceil,truncate} always return an Integer.
+    [Bug #13420]
+  * Integer#pow accepts modulo argument for calculating modular
+    exponentiation.  [Feature #12508] [Feature #11003]
+
+  * New methods:
+
+    * Integer#allbits?, Integer#anybits?, Integer#nobits? [Feature #12753]
+    * Integer.sqrt  [Feature #13219]
+
+* Kernel
+
+  * Kernel#yield_self   [Feature #6721]
+  * Kernel#pp  [Feature #14123]
+  * Kernel#warn(..., uplevel:n)  [Feature #12882]
+
+* Method
+
+  * New methods:
+
+    * Method#=== that invokes Method#call, as same as Proc#=== [Feature #14142]
+
+* Module
+
+  * Module#{attr,attr_accessor,attr_reader,attr_writer} become public [Feature #14132]
+  * Module#{define_method,alias_method,undef_method,remove_method} become public [Feature #14133]
+
+* Numeric
+
+  * Numerical comparison operators (<,<=,>=,>) no longer hide exceptions
+    from #coerce method internally. Return nil in #coerce if the coercion is
+    impossible.  [Feature #7688]
+
+* Process
+
+  * Precision of Process.times is improved if getrusage(2) exists. [Feature #11952]
+
+  * New method:
+
+    * Process.last_status as an alias of $? [Feature #14043]
+
+* Range
+  * Range#initialize no longer hides exceptions when comparing begin and
+    end with #<=> and raise a "bad value for range" ArgumentError
+    but instead lets the exception from the #<=> call go through.
+    [Feature #7688]
+
+* Regexp
+
+  * Update to Onigmo 6.1.3-669ac9997619954c298da971fcfacccf36909d05.
+
+    * Support absence operator https://github.com/k-takata/Onigmo/issues/82
+
+  * Support new 5 emoji-related Unicode character properties
+
+* RubyVM::InstructionSequence
+
+  * New method:
+
+    * RubyVM::InstructionSequence#each_child
+    * RubyVM::InstructionSequence#trace_points
+
+* String
+
+  * String#-@ deduplicates unfrozen strings.  Already-frozen
+    strings remain unchanged for compatibility.  [Feature #13077]
+  * -"literal" (String#-@) optimized to return the same object
+    (same as "literal".freeze in Ruby 2.1+) [Feature #13295]
+  * String#{casecmp,casecmp?} return nil for non-string arguments
+    instead of raising a TypeError. [Bug #13312]
+  * String#start_with? accepts a regexp [Feature #13712]
+
+  * New methods:
+
+    * String#delete_prefix, String#delete_prefix! [Feature #12694]
+    * String#delete_suffix, String#delete_suffix! [Feature #13665]
+    * String#each_grapheme_cluster and String#grapheme_clusters to
+      enumerate grapheme clusters [Feature #13780]
+    * String#undump to unescape String#dump'ed string [Feature #12275]
+
+* Struct
+
+  * Struct.new takes `keyword_init: true` option to initialize members
+    with keyword arguments. [Feature #11925]
+
+* Regexp/String: Update Unicode version from 9.0.0 to 10.0.0 [Feature #13685]
+
+* Thread
+
+  * Description set by Thread#name= is now visible on Windows 10.
+
+  * New method:
+    * Thread#fetch  [Feature #13009]
+
+  * The default of Thread.report_on_exception is now true,
+    showing unhandled exceptions terminating threads on $stderr.
+    [Feature #14143]
+
+* Time
+
+  * Time#at receives 3rd argument which specifies the unit of 2nd argument.
+    [Feature #13919]
+
+* KeyError
+
+  * New methods:
+
+    * KeyError#receiver [Feature #12063]
+    * KeyError#key      [Feature #12063]
+
+* FrozenError
+
+  * New exception class. [Feature #13224]
+
+=== Stdlib updates (outstanding ones only)
+
+* BigDecimal
+
+  * Update to BigDecimal 1.3.4
+
+  * The following features are added:
+
+    * BigDecimal::VERSION
+
+  * The following features have been deprecated,
+    and are planned to be removed in the version 1.4.0:
+
+    * BigDecimal.new
+
+    * BigDecimal.ver
+
+  * BigDecimal#clone and #dup now do not make a new instance,
+    but returns the receiver itself.
+
+* Coverage
+
+  * Support branch coverage and method coverage measurement. [Feature #13901]
+    Branch coverage tells you which branches are executed, and which not.
+    Method coverage tells you which methods are invoked, and which not.
+    By running a test suite with this new feature, you can know which branches
+    and methods are executed by a test, and evaluate total coverage of a test
+    suite more strictly.
+
+    You can specify the measuring target by an option to `Coverage.start`:
+
+        Coverage.start(lines: true, branches: true, methods: true)
+
+    After some Ruby files are loaded, you can use `Coverage.result` to get
+    the coverage result:
+
+        Coverage.result
+        #=> { "/path/to/file.rb"=>
+        #     { :lines => [1, 2, 0, nil, ...],
+        #       :branches =>
+        #         { [:if, 0, 2, 1, 6, 4] =>
+        #             { [:then, 1, 3, 2, 3, 8] => 0,
+        #               [:else, 2, 5, 2, 5, 8] => 2
+        #             }
+        #         },
+        #       :methods => {
+        #          [Object, :foo, 1, 0, 7, 3] => 2
+        #       }
+        #     }
+        #   }
+
+    The result type of line coverage is not changed; it is just an array that
+    contains numbers, which means the count that each line was executed,
+    or `nil`s, which means that the line is not relevant.
+
+    The result type of branch coverage is:
+
+        { (jump base) => { (jump target) => (counter) } }
+
+    where jump base and targets have the format
+
+        [type, unique-id, start lineno, start column, end lineno, end column]
+
+    For example, `[:if, 0, 2, 1, 6, 4]` reads an `if` statement that ranges from
+    line 2 and column 1, to line 6 and column 4.  `[:then, 1, 3, 2, 3, 8]` reads
+    a `then` clause that ranges from line 3 and column 2, to line 3 and column 8.
+    Note that lineno starts from 1, and that columnno starts from 0.  So, the
+    above example shows a branch from the `if` to the `then` was never executed,
+    and a branch from the `if` to the `else` was executed twice.
+
+    The result type of method coverage is:
+
+        { (method key) => (counter) }
+
+    where method key has the format
+
+        [class, method-name, start lineno, start column, end lineno, end column]
+
+    For example, `[Object, :foo, 1, 0, 7, 3]` reads `Object#foo` that ranges from
+    line 1 and column 0, to line 7 and column 3.  The above example shows this
+    `Object#foo` was invoked twice.
+
+    Note: To keep compatibility, passing no option to `Coverage.start` will measure
+    only line coverage, and `Coverage.result` will return the old format:
+
+        Coverage.result
+        #=> { "/path/to/file.rb"=> [1, 2, 0, nil, ...] }
+
+* DRb
+
+  * ACL::ACLEntry.new no longer suppresses IPAddr::InvalidPrefixError.
+
+* ERB
+
+  * Add ERB#result_with_hash to render a template with local variables passed
+    with a Hash object. [Feature #8631]
+
+  * Default template file encoding is changed from ASCII-8BIT to UTF-8 in erb
+    command. [Bug #14095]
+
+  * Carriage returns are changed to be trimmed properly if trim_mode is specified
+    and used. Duplicated newlines will be removed on Windows. [Bug #5339] [Bug #11464]
+
+* IPAddr
+
+  * IPAddr no longer accepts invalid address mask. [Bug #13399]
+  * IPAddr#{ipv4_compat,ipv4_compat?} are marked for deprecation. [Bug #13769]
+
+  * New methods:
+
+    * IPAddr#prefix
+    * IPAddr#loopback?
+    * IPAddr#private? [Feature #11666]
+    * IPAddr#link_local? [Feature #10912]
+
+
+* IRB
+
+  * Print backtrace and error message in reverse order [Feature #8661] [experimental]
+  * `binding.irb` automatically requires irb and runs [Bug #13099] [experimental]
+  * `binding.irb` on its start shows source around the line where it was called
+    [Feature #14124]
+
+* Matrix
+
+  * New methods:
+
+    * Matrix.combine and Matrix#combine [Feature #10903]
+    * Matrix#{hadamard_product,entrywise_product}
+
+* Net::HTTP
+
+  * Net::HTTP.new supports no_proxy parameter [Feature #11195]
+  * Net::HTTP#{min_version,max_version}, [Feature #9450]
+  * Add more HTTP status classes
+  * Net::HTTP::STATUS_CODES is added as HTTP Status Code Repository [Misc #12935]
+  * Net::HTTP#{proxy_user,proxy_pass} reflect http_proxy environment variable
+    if the system's environment variable is multiuser safe. [Bug #12921]
+
+* open-uri
+  * URI.open method defined as an alias to open-uri's Kernel.open.
+    open-uri's Kernel.open will be deprecated in future.
+
+* OpenSSL
+
+  * Updated Ruby/OpenSSL from version 2.0 to 2.1. Changes are noted in
+    "Version 2.1.0" section in ext/openssl/History.md.
+
+* Pathname
+
+  * New method:
+
+    * Pathname#glob [Feature #7360]
+
+* Psych
+
+  * Update to Psych 3.0.2.
+
+    * Convert fallback option to a keyword argument
+      https://github.com/ruby/psych/pull/342
+    * Add :symbolize_names option to Psych.load, Psych.safe_load like JSON.parse
+      https://github.com/ruby/psych/pull/333, https://github.com/ruby/psych/pull/337
+    * Add Psych::Handler#event_location
+      https://github.com/ruby/psych/pull/326
+    * Make frozen string literal = true
+      https://github.com/ruby/psych/pull/320
+    * Preserve time zone offset when deserializing times
+      https://github.com/ruby/psych/pull/316
+    * Remove deprecated method aliases for syck gem
+      https://github.com/ruby/psych/pull/312
+
+* RbConfig
+
+  * RbConfig::LIMITS is added to provide the limits of C types.
+    This is available when rbconfig/sizeof is loaded.
+
+* Ripper
+
+  * Ripper::EXPR_BEG and so on for Ripper#state.
+
+  * New method:
+
+    * Ripper#state to tell the state of scanner. [Feature #13686]
+
+* RDoc
+
+  * Update to RDoc 6.0.1.
+
+    * Replace IRB based lexer with Ripper.
+      * https://github.com/ruby/rdoc/pull/512
+      * This much improves the speed of generating documents.
+      * It also facilitates supporting new syntax in the future.
+    * Support many new syntaxes of Ruby from the past few years.
+    * Use "frozen_string_literal: true".
+      Performance survey: https://gist.github.com/aycabta/abdfaa75ea8a6877eeb734e942e73800
+    * Support did_you_mean.
+
+* Rubygems
+
+  * Update to Rubygems 2.7.3.
+    * http://blog.rubygems.org/2017/11/28/2.7.3-released.html
+    * http://blog.rubygems.org/2017/11/08/2.7.2-released.html
+    * http://blog.rubygems.org/2017/11/03/2.7.1-released.html
+    * http://blog.rubygems.org/2017/11/01/2.7.0-released.html
+    * http://blog.rubygems.org/2017/10/09/2.6.14-released.html
+    * http://blog.rubygems.org/2017/08/27/2.6.13-released.html
+
+* SecureRandom
+
+  * New method:
+
+    * SecureRandom.alphanumeric
+
+* Set
+
+  * New methods:
+
+    * Set#to_s as alias to #inspect [Feature #13676]
+    * Set#=== as alias to #include? [Feature #13801]
+    * Set#reset [Feature #6589]
+
+* StringIO
+
+  * StringIO#write accepts multiple arguments
+
+* StringScanner
+
+  * New methods:
+
+    * StringScanner#size, StringScanner#captures, StringScanner#values_at  [Feature #836]
+
+* URI
+
+  * Relative path operations no longer collapse consecutive slashes to a single slash. [Bug #8352]
+
+* WEBrick
+
+  * Add Server Name Indication (SNI) support [Feature #13729]
+  * support Proc objects as body responses [Feature #855]
+  * released as a RubyGem [Feature #13173]
+  * avoid unintended behavior from Kernel#open [Misc #14216]
+
+* Zlib
+
+  * Zlib::GzipWriter#write accepts multiple arguments
+
+=== Compatibility issues (excluding feature bug fixes)
+
+* Socket
+
+  * BasicSocket#read_nonblock and BasicSocket#write_nonblock no
+    longer set the O_NONBLOCK file description flag as side effect
+    (on Linux only) [Feature #13362]
+
+* Random
+
+  * Random.raw_seed renamed to become Random.urandom.  It is now
+    applicable to non-seeding purposes due to [Bug #9569].
+
+* Socket
+
+  * Socket::Ifaddr#vhid is added [Feature #13803]
+
+* ConditionVariable, Queue and SizedQueue reimplemented for speed.
+  They no longer subclass Struct. [Feature #13552]
+
+=== Stdlib compatibility issues (excluding feature bug fixes)
+
+* Gemification
+
+  * Promote following standard libraries to default gems.
+    * cmath
+    * csv
+    * date
+    * dbm
+    * etc
+    * fcntl
+    * fiddle
+    * fileutils
+    * gdbm
+    * ipaddr
+    * scanf
+    * sdbm
+    * stringio
+    * strscan
+    * webrick
+    * zlib
+
+* Logger
+
+  * Logger.new("| command") had been working to open a command
+    unintentionally. It was prohibited, and now Logger#initialize
+    treats a String argument only as a filename, as its specification.
+    [Bug #14212]
+
+* Net::HTTP
+
+  * Net::HTTP#start now passes :ENV to p_addr by default. [Bug #13351]
+    To avoid this, pass nil explicitly.
+
+* mathn.rb
+
+  * Removed from stdlib. [Feature #10169]
+
+* Rubygems
+
+  * Removed "ubygems.rb" file from stdlib. It's needless since Ruby 1.9.
+
+=== C API updates
+
+=== Supported platform changes
+
+* Drop support of NaCl platform
+
+  * https://bugs.chromium.org/p/chromium/issues/detail?id=239656#c160
+
+=== Implementation improvements
+
+* (This might not be a "user visible feature change" but) Hash class's
+  hash function is now SipHash13. [Feature #13017]
+
+* SecureRandom now prefers OS-provided sources than OpenSSL. [Bug #9569]
+
+* Mutex rewritten to be smaller and faster [Feature #13517]
+
+* Performance of block passing using block parameters is improved by
+  lazy Proc allocation [Feature #14045]
+
+* Dynamic instrumentation for TracePoint hooks instead of using "trace"
+  instruction to avoid overhead [Feature #14104]
+
+* ERB now generates code from a template which runs 2 times faster than Ruby 2.4
+
+=== Miscellaneous changes
+
+* Print backtrace and error message in reverse order if STDERR is unchanged and a tty.
+  [Feature #8661] [experimental]
+
+* Print error message in bold/underlined text if STDERR is unchanged and a tty.
+  [Feature #14140] [experimental]
+
+* configure option --with-ext now mandates its arguments.  So for
+  instance if you run ./configure --with-ext=openssl,+ then the
+  openssl library is guaranteed compiled, otherwise the build fails
+  abnormally.
+
+  Note however to always add the ",+" at the end of the argument.
+  Otherwise nothing but openssl are built.  [Feature #13302]
diff --git a/NEWS.md b/NEWS.md
deleted file mode 100644
index cfe11295a0..0000000000
--- a/NEWS.md
+++ /dev/null
@@ -1,657 +0,0 @@
-# NEWS for Ruby 3.1.0
-
-This document is a list of user-visible feature changes
-since the **3.0.0** release, except for bug fixes.
-
-Note that each entry is kept to a minimum, see links for details.
-
-## Language changes
-
-*   The block argument can now be anonymous if the block will
-    only be passed to another method. [[Feature #11256]]
-
-    ```ruby
-    def foo(&)
-      bar(&)
-    end
-    ```
-
-*   Pin operator now takes an expression. [[Feature #17411]]
-
-    ```ruby
-    Prime.each_cons(2).lazy.find_all{_1 in [n, ^(n + 2)]}.take(3).to_a
-    #=> [[3, 5], [5, 7], [11, 13]]
-    ```
-
-*   Pin operator now supports instance, class, and global variables.
-    [[Feature #17724]]
-
-    ```ruby
-    @n = 5
-    Prime.each_cons(2).lazy.find{_1 in [n, ^@n]}
-    #=> [3, 5]
-    ```
-
-*   One-line pattern matching is no longer experimental.
-
-*   Parentheses can be omitted in one-line pattern matching.
-    [[Feature #16182]]
-
-    ```ruby
-    [0, 1] => _, x
-    {y: 2} => y:
-    x #=> 1
-    y #=> 2
-    ```
-
-*   Multiple assignment evaluation order has been made consistent with
-    single assignment evaluation order.  With single assignment, Ruby
-    uses a left-to-right evaluation order.  With this code:
-
-    ```ruby
-    foo[0] = bar
-    ```
-
-    The following evaluation order is used:
-
-    1. `foo`
-    2. `bar`
-    3. `[]=` called on the result of `foo`
-
-    In Ruby before 3.1.0, multiple assignment did not follow this
-    evaluation order.  With this code:
-
-    ```ruby
-    foo[0], bar.baz = a, b
-    ```
-
-    Versions of Ruby before 3.1.0 would evaluate in the following
-    order
-
-    1. `a`
-    2. `b`
-    3. `foo`
-    4. `[]=` called on the result of `foo`
-    5. `bar`
-    6. `baz=` called on the result of `bar`
-
-    Starting in Ruby 3.1.0, the evaluation order is now consistent with
-    single assignment, with the left-hand side being evaluated before
-    the right-hand side:
-
-    1. `foo`
-    2. `bar`
-    3. `a`
-    4. `b`
-    5. `[]=` called on the result of `foo`
-    6. `baz=` called on the result of `bar`
-
-    [[Bug #4443]]
-
-*   Values in Hash literals and keyword arguments can be omitted.
-    [[Feature #14579]]
-
-    For example,
-
-    * `{x:, y:}` is a syntax sugar of `{x: x, y: y}`.
-    * `foo(x:, y:)` is a syntax sugar of `foo(x: x, y: y)`.
-
-    Constant names, local variable names, and method names are allowed as
-    key names.  Note that a reserved word is considered as a local
-    variable or method name even if it's a pseudo variable name such as
-    `self`.
-
-*   Non main-Ractors can get instance variables (ivars) of classes/modules
-    if ivars refer to shareable objects.
-    [[Feature #17592]]
-
-*   A command syntax is allowed in endless method definitions, i.e.,
-    you can now write `def foo = puts "Hello"`.
-    Note that `private def foo = puts "Hello"` does not parse.
-    [[Feature #17398]]
-
-## Command line options
-
-* `--disable-gems` is now explicitly declared as "just for debugging".
-  Never use it in any real-world codebase.
-  [[Feature #17684]]
-
-## Core classes updates
-
-Note: We're only listing outstanding class updates.
-
-* Array
-
-    * Array#intersect? is added. [[Feature #15198]]
-
-* Class
-
-    *   Class#subclasses, which returns an array of classes
-        directly inheriting from the receiver, not
-        including singleton classes.
-        [[Feature #18273]]
-
-        ```ruby
-        class A; end
-        class B < A; end
-        class C < B; end
-        class D < A; end
-        A.subclasses    #=> [D, B]
-        B.subclasses    #=> [C]
-        C.subclasses    #=> []
-        ```
-
-* Enumerable
-
-    *   Enumerable#compact is added. [[Feature #17312]]
-
-    *   Enumerable#tally now accepts an optional hash to count. [[Feature #17744]]
-
-    *   Enumerable#each_cons and each_slice to return a receiver. [[GH-1509]]
-
-        ```ruby
-        [1, 2, 3].each_cons(2){}
-        # 3.0 => nil
-        # 3.1 => [1, 2, 3]
-
-        [1, 2, 3].each_slice(2){}
-        # 3.0 => nil
-        # 3.1 => [1, 2, 3]
-        ```
-
-* Enumerator::Lazy
-
-    *   Enumerator::Lazy#compact is added. [[Feature #17312]]
-
-* File
-
-    *   File.dirname now accepts an optional argument for the level to
-        strip path components. [[Feature #12194]]
-
-* GC
-
-    *   "GC.measure_total_time = true" enables the measurement of GC.
-        Measurement can introduce overhead. It is enabled by default.
-        GC.measure_total_time returns the current setting.
-        GC.stat[:time] or GC.stat(:time) returns measured time
-        in milli-seconds. [[[Feature #10917]]]
-
-    *   GC.total_time returns measured time in nano-seconds. [[[Feature #10917]]]
-
-* Integer
-
-    *   Integer.try_convert is added. [[Feature #15211]]
-
-* Kernel
-
-
-    *   Kernel#load now accepts a module as the second argument,
-        and will load the file using the given module as the
-        top-level module. [[Feature #6210]]
-
-* Marshal
-
-    *   Marshal.load now accepts a `freeze: true` option.
-        All returned objects are frozen except for `Class` and
-        `Module` instances. Strings are deduplicated. [[Feature #18148]]
-
-* MatchData
-
-    *   MatchData#match is added [[Feature #18172]]
-
-    *   MatchData#match_length is added [[Feature #18172]]
-
-* Method / UnboundMethod
-
-    *   Method#public?, Method#private?, Method#protected?,
-        UnboundMethod#public?, UnboundMethod#private?,
-        UnboundMethod#protected? have been added. [[Feature #11689]]
-
-* Module
-
-    *   Module#prepend now modifies the ancestor chain if the receiver
-        already includes the argument. Module#prepend still does not
-        modify the ancestor chain if the receiver has already prepended
-        the argument. [[Bug #17423]]
-
-    *   Module#private, #public, #protected, and #module_function will
-        now return their arguments.  If a single argument is given, it
-        is returned. If no arguments are given, nil is returned.  If
-        multiple arguments are given, they are returned as an array.
-        [[Feature #12495]]
-
-* Process
-
-    *   Process.\_fork is added. This is a core method for fork(2).
-        Do not call this method directly; it is called by existing
-        fork methods: Kernel.#fork, Process.fork, and IO.popen("-").
-        Application monitoring libraries can overwrite this method to
-        hook fork events. [[Feature #17795]]
-
-* Struct
-
-    *   Passing only keyword arguments to Struct#initialize is warned.
-        You need to use a Hash literal to set a Hash to a first member.
-        [[Feature #16806]]
-
-    *   StructClass#keyword_init? is added [[Feature #18008]]
-
-* String
-
-    *   Update Unicode version to 13.0.0 [[Feature #17750]]
-        and Emoji version to 13.0 [[Feature #18029]]
-
-    *   String#unpack and String#unpack1 now accept an `offset:` keyword
-        argument to start the unpacking after an arbitrary number of bytes
-        have been skipped. If `offset` is outside of the string bounds
-        `ArgumentError` is raised. [[Feature #18254]]
-
-* Thread
-
-    *   Thread#native_thread_id is added. [[Feature #17853]]
-
-* Thread::Backtrace
-
-    *   Thread::Backtrace.limit, which returns the value to limit backtrace
-        length set by `--backtrace-limit` command line option, is added.
-        [[Feature #17479]]
-
-* Thread::Queue
-
-    *   Thread::Queue.new now accepts an Enumerable of initial values.
-        [[Feature #17327]]
-
-* Time
-
-    *   Time.new now accepts optional `in:` keyword argument for the
-        timezone, as well as `Time.at` and `Time.now`, so that is now
-        you can omit minor arguments to `Time.new`. [[Feature #17485]]
-
-        ```ruby
-        Time.new(2021, 12, 25, in: "+07:00")
-        #=> 2021-12-25 00:00:00 +0700
-        ```
-
-        At the same time, time component strings are converted to
-        integers more strictly now.
-
-        ```ruby
-        Time.new(2021, 12, 25, "+07:30")
-        #=> invalid value for Integer(): "+07:30" (ArgumentError)
-        ```
-
-        Ruby 3.0 or earlier returned probably unexpected result
-        `2021-12-25 07:00:00`, not `2021-12-25 07:30:00` nor
-        `2021-12-25 00:00:00 +07:30`.
-
-    *   Time#strftime supports RFC 3339 UTC for unknown offset local
-        time, `-0000`, as `%-z`. [[Feature #17544]]
-
-* TracePoint
-
-    *   TracePoint.allow_reentry is added to allow reenter while TracePoint
-        callback.
-        [[Feature #15912]]
-
-* $LOAD_PATH
-
-    *   $LOAD_PATH.resolve_feature_path does not raise. [[Feature #16043]]
-
-* Fiber Scheduler
-
-    *   Add support for `Addrinfo.getaddrinfo` using `address_resolve` hook.
-        [[Feature #17370]]
-
-    *   Introduce non-blocking `Timeout.timeout` using `timeout_after` hook.
-        [[Feature #17470]]
-
-    *   Introduce new scheduler hooks `io_read` and `io_write` along with a
-        low level `IO::Buffer` for zero-copy read/write. [[Feature #18020]]
-
-    *   IO hooks `io_wait`, `io_read`, `io_write`, receive the original IO object
-        where possible. [[Bug #18003]]
-
-    *   Make `Monitor` fiber-safe. [[Bug #17827]]
-
-    *   Replace copy coroutine with pthread implementation. [[Feature #18015]]
-
-* Refinement
-
-    *   New class which represents a module created by Module#refine.
-        `include` and `prepend` are deprecated, and `import_methods` is added
-        instead. [[Bug #17429]]
-
-## Stdlib updates
-
-*   The following default gem are updated.
-    * RubyGems 3.3.3
-    * base64 0.1.1
-    * benchmark 0.2.0
-    * bigdecimal 3.1.1
-    * bundler 2.3.3
-    * cgi 0.3.1
-    * csv 3.2.2
-    * date 3.2.2
-    * did_you_mean 1.6.1
-    * digest 3.1.0
-    * drb 2.1.0
-    * erb 2.2.3
-    * error_highlight 0.3.0
-    * etc 1.3.0
-    * fcntl 1.0.1
-    * fiddle 1.1.0
-    * fileutils 1.6.0
-    * find 0.1.1
-    * io-console 0.5.10
-    * io-wait 0.2.1
-    * ipaddr 1.2.3
-    * irb 1.4.1
-    * json 2.6.1
-    * logger 1.5.0
-    * net-http 0.2.0
-    * net-protocol 0.1.2
-    * nkf 0.1.1
-    * open-uri 0.2.0
-    * openssl 3.0.0
-    * optparse 0.2.0
-    * ostruct 0.5.2
-    * pathname 0.2.0
-    * pp 0.3.0
-    * prettyprint 0.1.1
-    * psych 4.0.3
-    * racc 1.6.0
-    * rdoc 6.4.0
-    * readline 0.0.3
-    * readline-ext 0.1.4
-    * reline 0.3.0
-    * resolv 0.2.1
-    * rinda 0.1.1
-    * ruby2_keywords 0.0.5
-    * securerandom 0.1.1
-    * set 1.0.2
-    * stringio 3.0.1
-    * strscan 3.0.1
-    * tempfile 0.1.2
-    * time 0.2.0
-    * timeout 0.2.0
-    * tmpdir 0.1.2
-    * un 0.2.0
-    * uri 0.11.0
-    * yaml 0.2.0
-    * zlib 2.1.1
-*   The following bundled gems are updated.
-    * minitest 5.15.0
-    * power_assert 2.0.1
-    * rake 13.0.6
-    * test-unit 3.5.3
-    * rexml 3.2.5
-    * rbs 2.1.0
-    * typeprof 0.21.2
-*   The following default gems are now bundled gems.
-    * net-ftp 0.1.3
-    * net-imap 0.2.3
-    * net-pop 0.1.1
-    * net-smtp 0.3.1
-    * matrix 0.4.2
-    * prime 0.1.2
-    * debug 1.4.0
-
-* Coverage measurement now supports suspension. You can use `Coverage.suspend`
-  to stop the measurement temporarily, and `Coverage.resume` to restart it.
-  See [[Feature #18176]] in detail.
-
-* Random::Formatter is moved to random/formatter.rb, so that you can
-  use `Random#hex`, `Random#base64`, and so on without SecureRandom.
-  [[Feature #18190]]
-
-## Compatibility issues
-
-Note: Excluding feature bug fixes.
-
-* `rb_io_wait_readable`, `rb_io_wait_writable` and `rb_wait_for_single_fd` are
-  deprecated in favour of `rb_io_maybe_wait_readable`,
-  `rb_io_maybe_wait_writable` and `rb_io_maybe_wait` respectively.
-  `rb_thread_wait_fd` and `rb_thread_fd_writable` are deprecated. [[Bug #18003]]
-
-## Stdlib compatibility issues
-
-* `ERB#initialize` warns `safe_level` and later arguments even without -w.
-  [[Feature #14256]]
-
-* `lib/debug.rb` is replaced with `debug.gem`
-
-* `Kernel#pp` in `lib/pp.rb` uses the width of `IO#winsize` by default.
-  This means that the output width is automatically changed depending on
-  your terminal size. [[Feature #12913]]
-
-* Psych 4.0 changes `Psych.load` as `safe_load` by the default.
-  You may need to use Psych 3.3.2 for migrating to this behavior.
-  [[Bug #17866]]
-
-## C API updates
-
-* Documented. [[GH-4815]]
-
-* `rb_gc_force_recycle` is deprecated and has been changed to a no-op.
-  [[Feature #18290]]
-
-## Implementation improvements
-
-* Inline cache mechanism is introduced for reading class variables.
-  [[Feature #17763]]
-
-* `instance_eval` and `instance_exec` now only allocate a singleton class when
-  required, avoiding extra objects and improving performance. [[GH-5146]]
-
-* The performance of `Struct` accessors is improved. [[GH-5131]]
-
-* `mandatory_only?` builtin special form to improve performance on
-  builtin methods. [[GH-5112]]
-
-* Experimental feature Variable Width Allocation in the garbage collector.
-  This feature is turned off by default and can be enabled by compiling Ruby
-  with flag `USE_RVARGC=1` set. [[Feature #18045]] [[Feature #18239]]
-
-## JIT
-
-* Rename Ruby 3.0's `--jit` to `--mjit`, and alias `--jit` to `--yjit`
-  on non-Windows x86-64 platforms and to `--mjit` on others.
-
-### MJIT
-
-* The default `--mjit-max-cache` is changed from 100 to 10000.
-
-* JIT-ed code is no longer cancelled when a TracePoint for class events
-  is enabled.
-
-* The JIT compiler no longer skips compilation of methods longer than
-  1000 instructions.
-
-* `--mjit-verbose` and `--mjit-warning` output "JIT cancel" when JIT-ed
-  code is disabled because TracePoint or GC.compact is used.
-
-### YJIT: New experimental in-process JIT compiler
-
-New JIT compiler available as an experimental feature. [[Feature #18229]]
-
-See [this blog post](https://shopify.engineering/yjit-just-in-time-compiler-cruby
-) introducing the project.
-
-* Disabled by default, use `--yjit` command-line option to enable YJIT.
-
-* Performance improvements on benchmarks based on real-world software,
-  up to 22% on railsbench, 39% on liquid-render.
-
-* Fast warm-up times.
-
-* Limited to Unix-like x86-64 platforms for now.
-
-## Static analysis
-
-### RBS
-
-*   Generics type parameters can be bounded ([PR](https://github.com/ruby/rbs/pull/844)).
-
-    ```rbs
-    # `T` must be compatible with the `_Output` interface.
-    # `PrettyPrint[String]` is ok, but `PrettyPrint[Integer]` is a type error.
-    class PrettyPrint[T < _Output]
-      interface _Output
-        def <<: (String) -> void
-      end
-
-      attr_reader output: T
-
-      def initialize: (T output) -> void
-    end
-    ```
-
-*   Type aliases can be generic. ([PR](https://github.com/ruby/rbs/pull/823))
-
-    ```rbs
-    # Defines a generic type `list`.
-    type list[T] = [ T, list[T] ]
-                 | nil
-
-    type str_list = list[String]
-    type int_list = list[Integer]
-    ```
-
-* [rbs collection](https://github.com/ruby/rbs/blob/master/docs/collection.md) has been introduced to manage gems’ RBSs.
-
-* Many signatures for built-in and standard libraries have been added/updated.
-
-* It includes many bug fixes and performance improvements too.
-
-See the [CHANGELOG.md](https://github.com/ruby/rbs/blob/master/CHANGELOG.md) for more information.
-
-### TypeProf
-
-* [Experimental IDE support](https://github.com/ruby/typeprof/blob/master/doc/ide.md) has been implemented.
-* Many bug fixes and performance improvements since Ruby 3.0.0.
-
-## Debugger
-
-* A new debugger [debug.gem](https://github.com/ruby/debug) is bundled.
-  debug.gem is a fast debugger implementation, and it provides many features
-  like remote debugging, colorful REPL, IDE (VSCode) integration, and more.
-  It replaces `lib/debug.rb` standard library.
-
-* `rdbg` command is also installed into `bin/` directory to start and control
-  debugging execution.
-
-## error_highlight
-
-A built-in gem called error_highlight has been introduced.
-It shows fine-grained error locations in the backtrace.
-
-Example: `title = json[:article][:title]`
-
-If `json` is nil, it shows:
-
-```
-$ ruby test.rb
-test.rb:2:in `<main>': undefined method `[]' for nil:NilClass (NoMethodError)
-
-title = json[:article][:title]
-            ^^^^^^^^^^
-```
-
-If `json[:article]` returns nil, it shows:
-
-```
-$ ruby test.rb
-test.rb:2:in `<main>': undefined method `[]' for nil:NilClass (NoMethodError)
-
-title = json[:article][:title]
-                      ^^^^^^^^
-```
-
-This feature is enabled by default.
-You can disable it by using a command-line option `--disable-error_highlight`.
-See [the repository](https://github.com/ruby/error_highlight) in detail.
-
-## IRB Autocomplete and Document Display
-
-The IRB now has an autocomplete feature, where you can just type in the code, and the completion candidates dialog will appear. You can use Tab and Shift+Tab to move up and down.
-
-If documents are installed when you select a completion candidate, the documentation dialog will appear next to the completion candidates dialog, showing part of the content. You can read the full document by pressing Alt+d.
-
-## Miscellaneous changes
-
-* lib/objspace/trace.rb is added, which is a tool for tracing the object
-  allocation. Just by requiring this file, tracing is started *immediately*.
-  Just by `Kernel#p`, you can investigate where an object was created.
-  Note that just requiring this file brings a large performance overhead.
-  This is only for debugging purposes. Do not use this in production.
-  [[Feature #17762]]
-
-* Now exceptions raised in finalizers will be printed to `STDERR`, unless
-  `$VERBOSE` is `nil`.  [[Feature #17798]]
-
-* `ruby -run -e httpd` displays URLs to access.  [[Feature #17847]]
-
-* Add `ruby -run -e colorize` to colorize Ruby code using
-  `IRB::Color.colorize_code`.
-
-[Bug #4443]:      https://bugs.ruby-lang.org/issues/4443
-[Feature #6210]:  https://bugs.ruby-lang.org/issues/6210
-[Feature #10917]: https://bugs.ruby-lang.org/issues/10917
-[Feature #11256]: https://bugs.ruby-lang.org/issues/11256
-[Feature #11689]: https://bugs.ruby-lang.org/issues/11689
-[Feature #12194]: https://bugs.ruby-lang.org/issues/12194
-[Feature #12495]: https://bugs.ruby-lang.org/issues/12495
-[Feature #12913]: https://bugs.ruby-lang.org/issues/12913
-[Feature #14256]: https://bugs.ruby-lang.org/issues/14256
-[Feature #14579]: https://bugs.ruby-lang.org/issues/14579
-[Feature #15198]: https://bugs.ruby-lang.org/issues/15198
-[Feature #15211]: https://bugs.ruby-lang.org/issues/15211
-[Feature #15912]: https://bugs.ruby-lang.org/issues/15912
-[Feature #16043]: https://bugs.ruby-lang.org/issues/16043
-[Feature #16182]: https://bugs.ruby-lang.org/issues/16182
-[Feature #16806]: https://bugs.ruby-lang.org/issues/16806
-[Feature #17312]: https://bugs.ruby-lang.org/issues/17312
-[Feature #17327]: https://bugs.ruby-lang.org/issues/17327
-[Feature #17370]: https://bugs.ruby-lang.org/issues/17370
-[Feature #17398]: https://bugs.ruby-lang.org/issues/17398
-[Feature #17411]: https://bugs.ruby-lang.org/issues/17411
-[Bug #17423]:     https://bugs.ruby-lang.org/issues/17423
-[Bug #17429]:     https://bugs.ruby-lang.org/issues/17429
-[Feature #17470]: https://bugs.ruby-lang.org/issues/17470
-[Feature #17479]: https://bugs.ruby-lang.org/issues/17479
-[Feature #17485]: https://bugs.ruby-lang.org/issues/17485
-[Feature #17544]: https://bugs.ruby-lang.org/issues/17544
-[Feature #17592]: https://bugs.ruby-lang.org/issues/17592
-[Feature #17684]: https://bugs.ruby-lang.org/issues/17684
-[Feature #17724]: https://bugs.ruby-lang.org/issues/17724
-[Feature #17744]: https://bugs.ruby-lang.org/issues/17744
-[Feature #17750]: https://bugs.ruby-lang.org/issues/17750
-[Feature #17762]: https://bugs.ruby-lang.org/issues/17762
-[Feature #17763]: https://bugs.ruby-lang.org/issues/17763
-[Feature #17795]: https://bugs.ruby-lang.org/issues/17795
-[Feature #17798]: https://bugs.ruby-lang.org/issues/17798
-[Bug #17827]:     https://bugs.ruby-lang.org/issues/17827
-[Feature #17847]: https://bugs.ruby-lang.org/issues/17847
-[Feature #17853]: https://bugs.ruby-lang.org/issues/17853
-[Bug #17866]:     https://bugs.ruby-lang.org/issues/17866
-[Bug #18003]:     https://bugs.ruby-lang.org/issues/18003
-[Feature #18008]: https://bugs.ruby-lang.org/issues/18008
-[Feature #18015]: https://bugs.ruby-lang.org/issues/18015
-[Feature #18020]: https://bugs.ruby-lang.org/issues/18020
-[Feature #18029]: https://bugs.ruby-lang.org/issues/18029
-[Feature #18045]: https://bugs.ruby-lang.org/issues/18045
-[Feature #18148]: https://bugs.ruby-lang.org/issues/18148
-[Feature #18172]: https://bugs.ruby-lang.org/issues/18172
-[Feature #18176]: https://bugs.ruby-lang.org/issues/18176
-[Feature #18190]: https://bugs.ruby-lang.org/issues/18190
-[Feature #18229]: https://bugs.ruby-lang.org/issues/18229
-[Feature #18239]: https://bugs.ruby-lang.org/issues/18239
-[Feature #18254]: https://bugs.ruby-lang.org/issues/18254
-[Feature #18273]: https://bugs.ruby-lang.org/issues/18273
-[Feature #18290]: https://bugs.ruby-lang.org/issues/18290
-
-[GH-1509]: https://github.com/ruby/ruby/pull/1509
-[GH-4815]: https://github.com/ruby/ruby/pull/4815
-[GH-5112]: https://github.com/ruby/ruby/pull/5112
-[GH-5131]: https://github.com/ruby/ruby/pull/5131
-[GH-5146]: https://github.com/ruby/ruby/pull/5146
diff --git a/README.ja.md b/README.ja.md
index bb69c09055..2902216f99 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -1,11 +1,3 @@
-[![Actions Status: MinGW](https://github.com/ruby/ruby/workflows/MinGW/badge.svg)](https://github.com/ruby/ruby/actions?query=workflow%3A"MinGW")
-[![Actions Status: MJIT](https://github.com/ruby/ruby/workflows/MJIT/badge.svg)](https://github.com/ruby/ruby/actions?query=workflow%3A"MJIT")
-[![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)
-[![Cirrus Status](https://api.cirrus-ci.com/github/ruby/ruby.svg)](https://cirrus-ci.com/github/ruby/ruby/master)
-
 # 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，
@@ -18,48 +10,40 @@ 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， macOS，
-    Haikuなどの上でも動く cf.
-    https://github.com/ruby/ruby/blob/master/doc/contributing.rdoc#platform-maintainers
+*   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，Haikuなどの上でも動く cf.
+    https://bugs.ruby-lang.org/projects/ruby-trunk/wiki/SupportedPlatformsJa
 
 
 ## 入手法
 
-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
-
-https://www.ruby-lang.org/ja/downloads/
-
-を参照してください．
-
-### Git
+### FTPで
 
-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．
+以下の場所においてあります．
 
-    $ git clone https://github.com/ruby/ruby.git
+ftp://ftp.ruby-lang.org/pub/ruby/
 
-他のブランチの一覧は次のコマンドで見られます．
+### Subversionで
 
-    $ git ls-remote https://github.com/ruby/ruby.git
+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．
 
-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．
+    $ svn co https://svn.ruby-lang.org/repos/ruby/trunk/ ruby
 
-### Subversion
+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．
 
-古いRubyのバージョンのソースコードは次のコマンドでも取得できます．
-
-    $ svn co https://svn.ruby-lang.org/repos/ruby/branches/ruby_2_6/ ruby
+    $ svn ls https://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
 
-    $ svn ls https://svn.ruby-lang.org/repos/ruby/branches/
+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
 
 ## ホームページ
 
@@ -71,33 +55,38 @@ https://www.ruby-lang.org/
 
 ## 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 [ruby-list-request@ruby-lang.org] まで本文に
+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
+
+まで本文に
 
     subscribe
 
 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 [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
+
+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@ruby-lang.org]: mailto:ruby-list-request@ruby-lang.org?subject=Join%20Ruby%20Mailing%20List&body=subscribe
-[ruby-dev-request@ruby-lang.org]: mailto:ruby-dev-request@ruby-lang.org?subject=Join%20Ruby%20Mailing%20List&body=subscribe
-
 ## 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.  (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
+1.  もし `configure` ファイルが見つからない，もしくは `configure.ac` より古いようなら， `autoconf` 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)`include/ruby/defines.h` を編集する
+3.  (必要ならば)`defines.h` を編集する
 
     多分，必要無いと思います．
 
@@ -106,8 +95,7 @@ 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
 
@@ -167,17 +155,17 @@ UNIXであれば `configure` がほとんどの差異を吸収してくれるは
 
 ## 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）や，
-[stackoverflow] 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） (https://www.ruby-lang.org/ja/community/mailing-lists) や，
+stackoverflow (https://ja.stackoverflow.com/) などのWebサイトに投稿してください．
 
 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 9b5a553ffb..7a24329fe8 100644
--- a/README.md
+++ b/README.md
@@ -1,17 +1,12 @@
-[![Actions Status: MinGW](https://github.com/ruby/ruby/workflows/MinGW/badge.svg)](https://github.com/ruby/ruby/actions?query=workflow%3A"MinGW")
-[![Actions Status: MJIT](https://github.com/ruby/ruby/workflows/MJIT/badge.svg)](https://github.com/ruby/ruby/actions?query=workflow%3A"MJIT")
-[![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)
-[![Cirrus Status](https://api.cirrus-ci.com/github/ruby/ruby.svg)](https://cirrus-ci.com/github/ruby/ruby/master)
+[![Build Status](https://travis-ci.org/ruby/ruby.svg)](https://travis-ci.org/ruby/ruby)
+[![Build status](https://ci.appveyor.com/api/projects/status/0sy8rrxut4o0k960/branch/trunk?svg=true)](https://ci.appveyor.com/project/ruby/ruby/branch/trunk)
 
 # What's 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.
+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.
 
 ## Features of Ruby
 
@@ -24,8 +19,8 @@ It is simple, straightforward, and extensible.
 *   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://github.com/ruby/ruby/blob/master/doc/maintainers.rdoc#label-Platform+Maintainers
+    well as Windows, macOS, Haiku, etc.) cf.
+    https://bugs.ruby-lang.org/projects/ruby-trunk/wiki/SupportedPlatforms
 
 
 ## How to get Ruby
@@ -35,66 +30,53 @@ like rvm, see:
 
 https://www.ruby-lang.org/en/downloads/
 
-### Git
+The Ruby distribution files can be found on the following FTP site:
 
-The mirror of the Ruby source tree can be checked out with the following command:
+ftp://ftp.ruby-lang.org/pub/ruby/
 
-    $ git clone https://github.com/ruby/ruby.git
-
-There are some other branches under development. Try the following command
-to see the list of 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.
+The trunk of the Ruby source tree can be checked out with the following
+command:
 
-### Subversion
+    $ svn co https://svn.ruby-lang.org/repos/ruby/trunk/ ruby
 
-Stable branches for older Ruby versions can be checked out with also the
-following command:
+Or if you are using git then use the following command:
 
-    $ svn co https://svn.ruby-lang.org/repos/ruby/branches/ruby_2_6/ ruby
+    $ git clone https://github.com/ruby/ruby.git
 
-Try the following command to see the list of branches:
+There are some other branches under development. Try the following command
+to see the list of branches:
 
     $ svn ls https://svn.ruby-lang.org/repos/ruby/branches/
 
+Or if you are using git then use the following command:
+
+    $ git ls-remote git://github.com/ruby/ruby.git
 
 ## Ruby home page
 
+The URL of the Ruby home page is:
+
 https://www.ruby-lang.org/
 
 ## Mailing list
 
-There is a mailing list to discuss Ruby. To subscribe to this list, please
+There is a mailing list to talk about Ruby. To subscribe to this list, please
 send the following phrase:
 
     subscribe
 
-in the mail body (not subject) to the address [ruby-talk-request@ruby-lang.org].
-
-[ruby-talk-request@ruby-lang.org]: mailto:ruby-talk-request@ruby-lang.org?subject=Join%20Ruby%20Mailing%20List&body=subscribe
-
-## Requirements to build from repository
-
-1. GNU or BSD make
-2. C99 compiler
-3. autoconf 2.67 or higher
-4. automake 1.15 or higher
-5. bison 2.3 or higher
-6. Ruby 2.2 or higher
-
-When building from a released version, only a C99 compiler and GNU or BSD make
-is required.
+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](rdoc-ref:win32/README.win32) instead of this document.
+    [win32/README.win32](win32/README.win32) instead of this document.
 
-2.  Run `./autogen.sh` to generate configure, when you build the source checked
-    out from the Git repository.
+2.  If `./configure` does not exist or is older than `configure.ac`, run
+    `autoconf` to (re)generate configure.
 
 3.  Run `./configure`, which will generate `config.h` and `Makefile`.
 
@@ -102,15 +84,14 @@ is required.
     environment. Specify `optflags=..` and `warnflags=..` as necessary to
     override them.
 
-4.  Edit `include/ruby/defines.h` if you need. Usually this step will not be needed.
+4.  Edit `defines.h` if you need. Usually this step will not be needed.
 
-5.  Optional: Remove comment mark(`#`) before the module names from `ext/Setup`.
+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.
 
-    This step is only necessary if you want to link modules statically.
-
-    If you don't want to compile dynamic extensions (probably on architectures
-    which do not allow dynamic loading), remove comment mark from the line
-    "`#option nodynamic`" in `ext/Setup`.
+    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.
 
@@ -123,7 +104,12 @@ is required.
     interpreter works well. If you see the message "`check succeeded`", your
     Ruby works as it should (hopefully).
 
-8.  Run '`make install`'.
+8.  Optionally, run `make update-gems` and `make extract-gems`.
+
+    If you want to install bundled gems, run `make update-gems` and
+    `make extract-gems` before running `make install`.
+
+9.  Run '`make install`'.
 
     This command will create the following directories and install files into
     them.
@@ -154,6 +140,7 @@ is required.
 
     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.
 
@@ -163,24 +150,26 @@ to remove old configuration after installing them in such case.
 
 ## Copying
 
-See the file [COPYING](rdoc-ref:COPYING).
+See the file [COPYING](COPYING).
 
 ## Feedback
 
-Questions about the Ruby language can be asked on the [Ruby-Talk] mailing list
-or on websites like https://stackoverflow.com.
+Questions about the Ruby language can be asked on the Ruby-Talk mailing list
+(https://www.ruby-lang.org/en/community/mailing-lists) or on websites like
+(https://stackoverflow.com).
 
-Bugs should be reported at https://bugs.ruby-lang.org. Read [HowToReport] for more information.
+Bug reports should be filed at https://bugs.ruby-lang.org. Read [HowToReport] for more information.
 
-[Ruby-Talk]: https://www.ruby-lang.org/en/community/mailing-lists
 [HowToReport]: https://bugs.ruby-lang.org/projects/ruby/wiki/HowToReport
 
 ## Contributing
 
-See the file [CONTRIBUTING.md](rdoc-ref:CONTRIBUTING)
+See the file [CONTRIBUTING.md](CONTRIBUTING.md)
+
 
 ## 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.
 
-<matz@ruby-lang.org>
+<mailto:matz@ruby-lang.org>
diff --git a/acinclude.m4 b/acinclude.m4
new file mode 100644
index 0000000000..99b24e6d93
--- /dev/null
+++ b/acinclude.m4
@@ -0,0 +1,46 @@
+# -*- autoconf -*-
+
+AC_DEFUN([_COLORIZE_RESULT_PREPARE], [
+    msg_checking= msg_result_yes= msg_result_no= msg_result_other= msg_reset=
+    AS_IF([test "x${CONFIGURE_TTY}" = xyes -o -t 1], [
+	msg_begin="`tput smso 2>/dev/null`"
+	AS_CASE(["$msg_begin"], ['@<:@'*m],
+	    [msg_begin="`echo "$msg_begin" | sed ['s/[0-9]*m$//']`"
+	    msg_checking="${msg_begin}33m"
+	    AS_IF([test ${TEST_COLORS:+set}], [
+		msg_result_yes=[`expr ":$TEST_COLORS:" : ".*:pass=\([^:]*\):"`]
+		msg_result_no=[`expr ":$TEST_COLORS:" : ".*:fail=\([^:]*\):"`]
+		msg_result_other=[`expr ":$TEST_COLORS:" : ".*:skip=\([^:]*\):"`]
+	    ])
+	    msg_result_yes="${msg_begin}${msg_result_yes:-32;1}m"
+	    msg_result_no="${msg_begin}${msg_result_no:-31;1}m"
+	    msg_result_other="${msg_begin}${msg_result_other:-33;1}m"
+	    msg_reset="${msg_begin}m"
+	    ])
+	AS_UNSET(msg_begin)
+	])
+    AS_REQUIRE_SHELL_FN([colorize_result],
+	[AS_FUNCTION_DESCRIBE([colorize_result], [MSG], [Colorize result])],
+        [AS_CASE(["$[]1"],
+            [yes], [AS_ECHO(["${msg_result_yes}$[]1${msg_reset}]")],
+            [no], [AS_ECHO(["${msg_result_no}$[]1${msg_reset}]")],
+            [AS_ECHO(["${msg_result_other}$[]1${msg_reset}]")])])
+])
+
+AC_DEFUN([COLORIZE_RESULT], [AC_REQUIRE([_COLORIZE_RESULT_PREPARE])dnl
+    AS_LITERAL_IF([$1],
+	[m4_case([$1],
+		[yes], [AS_ECHO(["${msg_result_yes}$1${msg_reset}"])],
+		[no], [AS_ECHO(["${msg_result_no}$1${msg_reset}"])],
+		[AS_ECHO(["${msg_result_other}$1${msg_reset}"])])],
+	[colorize_result "$1"]) dnl
+])
+
+AC_DEFUN([AC_CHECKING],[dnl
+AC_REQUIRE([_COLORIZE_RESULT_PREPARE])dnl
+AS_MESSAGE([checking ${msg_checking}$1${msg_reset}...])])
+
+AC_DEFUN([AC_MSG_RESULT], [dnl
+{ _AS_ECHO_LOG([result: $1])
+COLORIZE_RESULT([$1]); dnl
+}])
diff --git a/aclocal.m4 b/aclocal.m4
index e69de29bb2..18ba297b05 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -0,0 +1,15 @@
+# generated automatically by aclocal 1.15.1 -*- Autoconf -*-
+
+# Copyright (C) 1996-2017 Free Software Foundation, Inc.
+
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])
+m4_include([acinclude.m4])
diff --git a/addr2line.c b/addr2line.c
index f660be9129..09fcc3c225 100644
--- a/addr2line.c
+++ b/addr2line.c
@@ -8,26 +8,20 @@
 
 **********************************************************************/
 
-#if defined(__clang__)
-#pragma clang diagnostic ignored "-Wgnu-empty-initializer"
-#pragma clang diagnostic ignored "-Wgcc-compat"
-#endif
-
-#include "ruby/internal/config.h"
-#include "ruby/defines.h"
+#include "ruby/config.h"
 #include "ruby/missing.h"
 #include "addr2line.h"
 
 #include <stdio.h>
 #include <errno.h>
 
-#ifdef HAVE_LIBPROC_H
-#include <libproc.h>
+#ifdef HAVE_STDBOOL_H
+#include <stdbool.h>
+#else
+#include "missing/stdbool.h"
 #endif
 
-#include "ruby/internal/stdbool.h"
-
-#if defined(USE_ELF) || defined(HAVE_MACH_O_LOADER_H)
+#ifdef USE_ELF
 
 #include <fcntl.h>
 #include <limits.h>
@@ -40,6 +34,12 @@
 #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 alloca
@@ -63,20 +63,24 @@ void *alloca();
 # include <dlfcn.h>
 #endif
 
-#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
+#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 USE_ELF
-# ifdef __OpenBSD__
-#  include <elf_abi.h>
-# else
-#  include <elf.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 */
 
 #ifndef ElfW
 # if SIZEOF_VOIDP == 8
@@ -92,44 +96,17 @@ 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
 
-#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 */
+#ifndef SHF_COMPRESSED /* compatibility with glibc < 2.22 */
+#define SHF_COMPRESSED 0
+#endif
 
-PRINTF_ARGS(static int kprintf(const char *fmt, ...), 1, 2);
+int kprintf(const char *fmt, ...);
 
-typedef struct line_info {
+typedef struct {
     const char *dirname;
     const char *filename;
     const char *path; /* object path */
@@ -138,66 +115,27 @@ typedef struct line_info {
     uintptr_t base_addr;
     uintptr_t saddr;
     const char *sname; /* function name */
-
-    struct line_info *next;
 } line_info_t;
-
-struct dwarf_section {
-    char *ptr;
-    size_t size;
-    uint64_t flags;
-};
-
-typedef struct obj_info {
+typedef struct obj_info obj_info_t;
+struct obj_info {
     const char *path; /* object path */
-    char *mapped;
+    int fd;
+    void *mapped;
     size_t mapped_size;
-    void *uncompressed;
     uintptr_t base_addr;
-    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_rnglists;
-    struct dwarf_section debug_str;
-    struct obj_info *next;
-} obj_info_t;
-
-#define DWARF_SECTION_COUNT 6
-
-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_rnglists,
-        &obj->debug_str
-    };
-    if (n < 0 || DWARF_SECTION_COUNT <= n) {
-        abort();
-    }
-    return ary[n];
-}
-
-struct debug_section_definition {
-    const char *name;
-    struct dwarf_section *dwarf;
+    obj_info_t *next;
 };
 
 /* Avoid consuming stack as this module may be used from signal handler */
-static char binary_filename[PATH_MAX + 1];
+static char binary_filename[PATH_MAX];
 
 static unsigned long
-uleb128(const char **p)
+uleb128(char **p)
 {
     unsigned long r = 0;
     int s = 0;
     for (;;) {
-	unsigned char b = (unsigned char)*(*p)++;
+	unsigned char b = *(unsigned char *)(*p)++;
 	if (b < 0x80) {
 	    r += (unsigned long)b << s;
 	    break;
@@ -209,12 +147,12 @@ uleb128(const char **p)
 }
 
 static long
-sleb128(const char **p)
+sleb128(char **p)
 {
     long r = 0;
     int s = 0;
     for (;;) {
-	unsigned char b = (unsigned char)*(*p)++;
+	unsigned char b = *(unsigned char *)(*p)++;
 	if (b < 0x80) {
 	    if (b & 0x40) {
 		r -= (0x80 - b) << s;
@@ -231,7 +169,7 @@ sleb128(const char **p)
 }
 
 static const char *
-get_nth_dirname(unsigned long dir, const char *p)
+get_nth_dirname(unsigned long dir, char *p)
 {
     if (!dir--) {
 	return "";
@@ -249,18 +187,19 @@ get_nth_dirname(unsigned long dir, const char *p)
 }
 
 static void
-fill_filename(int file, const char *include_directories, const char *filenames, line_info_t *line, obj_info_t *obj)
+fill_filename(int file, char *include_directories, char *filenames,
+	      line_info_t *line)
 {
     int i;
-    const char *p = filenames;
-    const char *filename;
+    char *p = filenames;
+    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 at %tx\n",
-		    file, binary_filename, filenames - obj->mapped);
+	    kprintf("Unexpected file number %d in %s\n",
+		    file, binary_filename);
 	    return;
 	}
 	while (*p) p++;
@@ -280,132 +219,108 @@ fill_filename(int file, const char *include_directories, const char *filenames,
 
 static void
 fill_line(int num_traces, void **traces, uintptr_t addr, int file, int line,
-	  const char *include_directories, const char *filenames,
+	  char *include_directories, char *filenames,
 	  obj_info_t *obj, line_info_t *lines, int offset)
 {
     int i;
-    addr += obj->base_addr - obj->vmaddr;
+    addr += obj->base_addr;
     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.
        We may want more reliable way eventually... */
 	if (addr < a && a < addr + 100) {
-	    fill_filename(file, include_directories, filenames, &lines[i], obj);
+	    fill_filename(file, include_directories, filenames, &lines[i]);
 	    lines[i].line = 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;
-};
-
 static int
-parse_debug_line_header(const char **pp, struct LineNumberProgramHeader *header)
+parse_debug_line_cu(int num_traces, void **traces, char **debug_line,
+		obj_info_t *obj, line_info_t *lines, int offset)
 {
-    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;
+    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;
+
+    unit_length = *(unsigned int *)p;
+    p += sizeof(unsigned int);
+    if (unit_length == 0xffffffff) {
+	unit_length = *(unsigned long *)p;
+	p += sizeof(unsigned long);
     }
 
-    header->cu_end = p + header->unit_length;
+    cu_end = p + unit_length;
 
-    header->version = *(uint16_t *)p;
-    p += sizeof(uint16_t);
-    if (header->version > 4) return -1;
+    /*dwarf_version = *(unsigned short *)p;*/
+    p += 2;
 
-    header->header_length = header->format == 4 ? *(uint32_t *)p : *(uint64_t *)p;
-    p += header->format;
-    header->cu_start = p + header->header_length;
+    header_length = *(unsigned int *)p;
+    p += sizeof(unsigned int);
 
-    header->minimum_instruction_length = *(uint8_t *)p++;
+    cu_start = p + header_length;
 
-    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++;
-    }
+    minimum_instruction_length = *(unsigned 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->