vm_args.c: GC guard

* vm_args.c (vm_caller_setup_arg_block): prevent newly created
  ifunc object from GC.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51991 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 0 deletions

diff --git a/test/ruby/test_symbol.rb b/test/ruby/test_symbol.rb
index 7b1dbd3ae7..b62e7538c8 100644
--- a/test/ruby/test_symbol.rb
+++ b/test/ruby/test_symbol.rb
@@ -117,6 +117,11 @@ class TestSymbol < Test::Unit::TestCase
       ary_ids = ary.collect{|x| x.object_id }
       assert_equal ary_ids, ary.collect(&:object_id)
     end
+
+    assert_ruby_status([], <<-"end;", timeout: 0.1)
+      GC.stress = true
+      true.tap(&:itself)
+    end;
   end
 
   def test_call