From: Tomoyuki Chikanaga <nagachika00@...>
Date: 2011-07-27T12:34:53+09:00
Subject: [ruby-dev:44253] [Ruby 1.9 - Bug #5104][Open] test_rinda.rb の GC保護もれ


Issue #5104 has been reported by Tomoyuki Chikanaga.

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Bug #5104: test_rinda.rb の GC保護もれ
http://redmine.ruby-lang.org/issues/5104

Author: Tomoyuki Chikanaga
Status: Open
Priority: Normal
Assignee: Masatoshi Seki
Category: test
Target version: 1.9.x
ruby -v: ruby 1.9.4dev (2011-07-26 trunk 32672) [i686-linux]


make test-all TESTS="--gc-stress -vq rinda/test_rinda.rb -n test_remote_array_and_hash"
と GC.stress = true で rinda のテストを通すと環境によって以下のように失敗します。

Rinda::TupleSpaceProxyTest#test_remote_array_and_hash = 4.62 s = E


Finished tests in 4.626161s, 0.2162 tests/s, 0.0000 assertions/s.

  1) Error:
test_remote_array_and_hash(Rinda::TupleSpaceProxyTest):
NoMethodError: undefined method `size' for nil:NilClass
    /home/chikanaga/opt/ruby-trunk/src/ruby/test/rinda/test_rinda.rb:542:in `test_remote_array_and_hash'
    ../ruby/test/runner.rb:15:in `<main>'

1 tests, 0 assertions, 0 failures, 1 errors, 0 skips

これはおそらくテストが悪くて、DRbObject は渡されたオブジェクトへの参照を保持せず object_id だけ持つので
参照されるオブジェクトが GC されないようにしないといけないと思います。どうでしょうか。
以下のようにローカル変数に格納して保護すれば OK になりました。

diff --git a/test/rinda/test_rinda.rb b/test/rinda/test_rinda.rb
index b69b63a..f113777 100644
--- a/test/rinda/test_rinda.rb
+++ b/test/rinda/test_rinda.rb
@@ -539,9 +539,11 @@ class TupleSpaceProxyTest < Test::Unit::TestCase
   end

   def test_remote_array_and_hash
-    @ts.write(DRbObject.new([1, 2, 3]))
+    ary = [1, 2, 3]
+    @ts.write(DRbObject.new(ary))
     assert_equal([1, 2, 3], @ts.take([1, 2, 3], 0))
-    @ts.write(DRbObject.new({'head' => 1, 'tail' => 2}))
+    hsh = {'head' => 1, 'tail' => 2}
+    @ts.write(DRbObject.new(hsh))
     assert_equal({'head' => 1, 'tail' => 2},
                  @ts.take({'head' => 1, 'tail' => 2}, 0))
   end



-- 
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