diff -r ed80554efa25 -r 8aae2050e83e src/share/vm/gc_implementation/g1/g1MarkSweep.cpp
--- a/src/share/vm/gc_implementation/g1/g1MarkSweep.cpp	Wed Nov 02 08:04:23 2011 +0100
+++ b/src/share/vm/gc_implementation/g1/g1MarkSweep.cpp	Mon Nov 07 22:11:12 2011 -0500
@@ -236,6 +236,7 @@
     // at the end of the GC, so no point in updating those values here.
     _g1h->update_sets_after_freeing_regions(0, /* pre_used */
                                             NULL, /* free_list */
+                                            NULL, /* old_proxy_set */
                                             &_humongous_proxy_set,
                                             false /* par */);
   }