--- a/hotspot/src/share/vm/gc_implementation/g1/ptrQueue.hpp	Tue Jan 10 20:02:41 2012 +0100
+++ b/hotspot/src/share/vm/gc_implementation/g1/ptrQueue.hpp	Tue Jan 10 18:58:13 2012 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -70,7 +70,7 @@
   // given PtrQueueSet.
   PtrQueue(PtrQueueSet* qset, bool perm = false, bool active = false);
   // Release any contained resources.
-  void flush();
+  virtual void flush();
   // Calls flush() when destroyed.
   ~PtrQueue() { flush(); }