3 files changed, 49 insertions, 0 deletions
diff --git a/ext/-test-/file/fs.c b/ext/-test-/file/fs.c
index c9c3473257..63d2356d76 100644
--- a/ext/-test-/file/fs.c
+++ b/ext/-test-/file/fs.c
@@ -89,6 +89,9 @@ get_noatime_p(VALUE self, VALUE str)
        rb_sys_fail_str(str);
     }
 # ifdef HAVE_STRUCT_STATFS_F_FLAGS
+#  ifdef MNT_STRICTATIME
+    if (!(st.f_flags & MNT_STRICTATIME)) return Qtrue;
+#  endif
 #  ifdef MNT_NOATIME
     return st.f_flags & MNT_NOATIME ? Qtrue : Qfalse;
 #  elif defined(ST_NOATIME)
diff --git a/ext/-test-/string/depend b/ext/-test-/string/depend
index 8e7ee2a55a..71e995a523 100644
--- a/ext/-test-/string/depend
+++ b/ext/-test-/string/depend
@@ -173,6 +173,17 @@ qsort.o: $(hdrdir)/ruby/subst.h
 qsort.o: $(hdrdir)/ruby/util.h
 qsort.o: $(top_srcdir)/include/ruby.h
 qsort.o: qsort.c
+rb_str_dup.o: $(RUBY_EXTCONF_H)
+rb_str_dup.o: $(arch_hdrdir)/ruby/config.h
+rb_str_dup.o: $(hdrdir)/ruby.h
+rb_str_dup.o: $(hdrdir)/ruby/backward.h
+rb_str_dup.o: $(hdrdir)/ruby/defines.h
+rb_str_dup.o: $(hdrdir)/ruby/intern.h
+rb_str_dup.o: $(hdrdir)/ruby/missing.h
+rb_str_dup.o: $(hdrdir)/ruby/ruby.h
+rb_str_dup.o: $(hdrdir)/ruby/st.h
+rb_str_dup.o: $(hdrdir)/ruby/subst.h
+rb_str_dup.o: rb_str_dup.c
 set_len.o: $(RUBY_EXTCONF_H)
 set_len.o: $(arch_hdrdir)/ruby/config.h
 set_len.o: $(hdrdir)/ruby/backward.h
diff --git a/ext/-test-/string/rb_str_dup.c b/ext/-test-/string/rb_str_dup.c
new file mode 100644
index 0000000000..a0bd65820f
--- /dev/null
+++ b/ext/-test-/string/rb_str_dup.c
@@ -0,0 +1,35 @@
+#include "ruby.h"
+
+VALUE rb_str_dup(VALUE str);
+
+static VALUE
+bug_rb_str_dup(VALUE self, VALUE str)
+{
+    rb_check_type(str, T_STRING);
+    return rb_str_dup(str);
+}
+
+static VALUE
+bug_shared_string_p(VALUE self, VALUE str)
+{
+    rb_check_type(str, T_STRING);
+    return RB_FL_TEST(str, RUBY_ELTS_SHARED) && RB_FL_TEST(str, RSTRING_NOEMBED) ? Qtrue : Qfalse;
+}
+
+static VALUE
+bug_sharing_with_shared_p(VALUE self, VALUE str)
+{
+    rb_check_type(str, T_STRING);
+    if (bug_shared_string_p(self, str)) {
+        return bug_shared_string_p(self, RSTRING(str)->as.heap.aux.shared);
+    }
+    return Qfalse;
+}
+
+void
+Init_string_rb_str_dup(VALUE klass)
+{
+    rb_define_singleton_method(klass, "rb_str_dup", bug_rb_str_dup, 1);
+    rb_define_singleton_method(klass, "shared_string?", bug_shared_string_p, 1);
+    rb_define_singleton_method(klass, "sharing_with_shared?", bug_sharing_with_shared_p, 1);
+}