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ruby-changes:67602

From: nagachika <ko1@a...>
Date: Sun, 5 Sep 2021 12:20:31 +0900 (JST)
Subject: [ruby-changes:67602] 92846db686 (ruby_3_0): merge revision(s) cd4f5b13228879d954fa97b6aa479c4a5ef4fb0a,8db269edb3550a85dfab9b193ea115ca36912ced,ab63f6d8543903f177c46634f38e5428655f003b: [Backport #18140]

https://git.ruby-lang.org/ruby.git/commit/?id=92846db686

From 92846db6861eed324288819157e6c7722fc62fc2 Mon Sep 17 00:00:00 2001
From: nagachika <nagachika@r...>
Date: Sun, 5 Sep 2021 12:19:53 +0900
Subject: merge revision(s)
 cd4f5b13228879d954fa97b6aa479c4a5ef4fb0a,8db269edb3550a85dfab9b193ea115ca36912ced,ab63f6d8543903f177c46634f38e5428655f003b:
 [Backport #18140]

	Guard array when appending

	This prevents early collection of the array.  The GC doesn't see the
	array on the stack when Ruby is compiled with optimizations enabled

	[ruby-core:105099] [Bug #18140]
	---
	 array.c                 | 1 +
	 test/ruby/test_array.rb | 6 ++++++
	 2 files changed, 7 insertions(+)

	Guard array when appending

	This prevents early collection of the array.  The GC doesn't see the
	array on the stack when Ruby is compiled with optimizations enabled

	Thanks @jhaberman for the test case

	[ruby-core:105099] [Bug #18140]
	---
	 ext/-test-/array/concat/depend          | 321 ++++++++++++++++++++++++++++++++
	 ext/-test-/array/concat/extconf.rb      |   2 +
	 ext/-test-/array/concat/to_ary_conact.c |  64 +++++++
	 test/-ext-/array/test_to_ary_concat.rb  |  20 ++
	 4 files changed, 407 insertions(+)
	 create mode 100644 ext/-test-/array/concat/depend
	 create mode 100644 ext/-test-/array/concat/extconf.rb
	 create mode 100644 ext/-test-/array/concat/to_ary_conact.c
	 create mode 100644 test/-ext-/array/test_to_ary_concat.rb

	Refined test [Bug #18140]

	---
	 ext/-test-/array/concat/to_ary_conact.c | 48 +++++++--------------------------
	 test/ruby/test_array.rb                 |  5 +++-
	 2 files changed, 13 insertions(+), 40 deletions(-)
---
 array.c                                 |   1 +
 ext/-test-/array/concat/depend          | 321 ++++++++++++++++++++++++++++++++
 ext/-test-/array/concat/extconf.rb      |   2 +
 ext/-test-/array/concat/to_ary_conact.c |  34 ++++
 test/-ext-/array/test_to_ary_concat.rb  |  20 ++
 test/ruby/test_array.rb                 |   9 +
 version.h                               |   2 +-
 7 files changed, 388 insertions(+), 1 deletion(-)
 create mode 100644 ext/-test-/array/concat/depend
 create mode 100644 ext/-test-/array/concat/extconf.rb
 create mode 100644 ext/-test-/array/concat/to_ary_conact.c
 create mode 100644 test/-ext-/array/test_to_ary_concat.rb

diff --git a/array.c b/array.c
index 7ed3b14..6993796 100644
--- a/array.c
+++ b/array.c
@@ -4821,6 +4821,7 @@ ary_append(VALUE x, VALUE y) https://github.com/ruby/ruby/blob/trunk/array.c#L4821
     if (n > 0) {
         rb_ary_splice(x, RARRAY_LEN(x), 0, RARRAY_CONST_PTR_TRANSIENT(y), n);
     }
+    RB_GC_GUARD(y);
     return x;
 }
 
diff --git a/ext/-test-/array/concat/depend b/ext/-test-/array/concat/depend
new file mode 100644
index 0000000..ba06937
--- /dev/null
+++ b/ext/-test-/array/concat/depend
@@ -0,0 +1,321 @@ https://github.com/ruby/ruby/blob/trunk/ext/-test-/array/concat/depend#L1
+# AUTOGENERATED DEPENDENCIES START
+resize.o: $(RUBY_EXTCONF_H)
+resize.o: $(arch_hdrdir)/ruby/config.h
+resize.o: $(hdrdir)/ruby/assert.h
+resize.o: $(hdrdir)/ruby/backward.h
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