nagachika	2011-08-30 22:39:31 +0900 (Tue, 30 Aug 2011)

  New Revision: 33127

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=33127

  Log:
    * test/dl/test_callback.rb (test_callback_with_string): prevents
      temporary string from GC.

  Modified files:
    trunk/ChangeLog
    trunk/test/dl/test_callback.rb

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 33126)
+++ ChangeLog	(revision 33127)
@@ -1,3 +1,8 @@
+Tue Aug 30 22:34:45 2011  CHIKANAGA Tomoyuki  <nagachika00@g...>
+
+	* test/dl/test_callback.rb (test_callback_with_string): prevents
+	  temporary string from GC.
+
 Tue Aug 30 22:25:38 2011  NAKAMURA Usaku  <usa@r...>
 
 	* vm_insnhelper.c (vm_call_cfunc): revert r33112.  RB_GC_GUARD macro
Index: test/dl/test_callback.rb
===================================================================
--- test/dl/test_callback.rb	(revision 33126)
+++ test/dl/test_callback.rb	(revision 33127)
@@ -48,8 +48,11 @@
       func = CFunc.new(addr, TYPE_VOID, 'test')
       f = Function.new(func, [TYPE_VOIDP])
 
-      f.call(dlwrap('foo'))
-      assert_equal 'foo', called_with
+      # Don't remove local variable arg.
+      # This necessary to protect objects from GC.
+      arg = 'foo'
+      f.call(dlwrap(arg))
+      assert_equal arg, called_with
     end
 
     def test_call_callback

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