gc.c (define_final0): avoid duplicate blocks

This prevents excessive memory growth when a WeakRef
is repeatedly created

* gc.c (define_final0): avoid duplicate blocks
  [Bug #10537]
* test/test_weakref.rb (test_repeated_object_leak): new test

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48820 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/test/test_weakref.rb b/test/test_weakref.rb
index 129c1e6ed1..36b5d5bc51 100644
--- a/test/test_weakref.rb
+++ b/test/test_weakref.rb
@@ -60,4 +60,12 @@ class TestWeakRef < Test::Unit::TestCase
       end
     }, bug7304
   end
+
+  def test_repeated_object_leak
+    bug10537 = '[ruby-core:66428]'
+    assert_no_memory_leak(%w(-rweakref), '', <<-'end;', bug10537)
+      a = Object.new
+      150_000.times { WeakRef.new(a) }
+    end;
+  end
 end