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+Mon May 13 15:24:16 2013  Koichi Sasada  <ko1@atdot.net>
+
+	* gc.c (rb_data_object_alloc): check klass only if klass is not 0.
+
 Mon May 13 14:57:28 2013  Koichi Sasada  <ko1@atdot.net>
 
 	* gc.c (rb_data_object_alloc, rb_data_typed_object_alloc):