* vm_insnhelper.c (vm_callee_setup_arg_complex, vm_yield_setup_block_args):

  clear keyword arguments to prevent GC bug which occurs
  while marking VM stack.
  [ruby-dev:47729] [Bug #8964]

* test/ruby/test_keyword.rb: tests for the above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43081 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 19 insertions, 0 deletions

diff --git a/test/ruby/test_keyword.rb b/test/ruby/test_keyword.rb
index c21afe4495..dd4f6d1b42 100644
--- a/test/ruby/test_keyword.rb
+++ b/test/ruby/test_keyword.rb
@@ -396,4 +396,23 @@ class TestKeywordArguments < Test::Unit::TestCase
     assert_equal([{}, {}], a.new.foo({}))
     assert_equal([{}, {:bar=>"x"}], a.new.foo({}, bar: "x"))
   end
+
+  def test_gced_object_in_stack
+    bug8964 = '[ruby-dev:47729] [Bug #8964]'
+    assert_normal_exit %q{
+      def m(a: [])
+      end
+      GC.stress = true
+      tap { m }
+      GC.start
+      tap { m }
+    }, bug8964
+    assert_normal_exit %q{
+      prc = Proc.new {|a: []|}
+      GC.stress = true
+      tap { prc.call }
+      GC.start
+      tap { prc.call }
+    }, bug8964
+  end
 end