diff -r 609242d28659 -r 3e91c67ddece hotspot/src/share/vm/gc_implementation/shared/markSweep.hpp
--- a/hotspot/src/share/vm/gc_implementation/shared/markSweep.hpp	Thu May 16 23:51:51 2013 +0200
+++ b/hotspot/src/share/vm/gc_implementation/shared/markSweep.hpp	Fri May 17 11:57:05 2013 +0200
@@ -88,7 +88,6 @@
   // Used for java/lang/ref handling
   class IsAliveClosure: public BoolObjectClosure {
    public:
-    virtual void do_object(oop p);
     virtual bool do_object_b(oop p);
   };