--- a/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp	Thu Mar 12 10:11:20 2015 +0100
+++ b/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp	Thu Mar 12 14:09:36 2015 +0100
@@ -396,6 +396,10 @@
   // Resizing support
   void set_end(HeapWord* value);  // override
 
+  // Never mangle CompactibleFreeListSpace
+  void mangle_unused_area() {}
+  void mangle_unused_area_complete() {}
+
   // Mutual exclusion support
   Mutex* freelistLock() const { return &_freelistLock; }