diff -r 74533f63b116 -r d2a62e0f25eb src/share/vm/gc_implementation/g1/g1BlockOffsetTable.hpp
--- a/src/share/vm/gc_implementation/g1/g1BlockOffsetTable.hpp	Wed Jun 27 15:23:36 2012 +0200
+++ b/src/share/vm/gc_implementation/g1/g1BlockOffsetTable.hpp	Thu Jun 28 17:03:16 2012 -0400
@@ -117,7 +117,7 @@
 
 // Here is the shared array type.
 
-class G1BlockOffsetSharedArray: public CHeapObj {
+class G1BlockOffsetSharedArray: public CHeapObj<mtGC> {
   friend class G1BlockOffsetArray;
   friend class G1BlockOffsetArrayContigSpace;
   friend class VMStructs;