--- old/src/share/vm/gc/g1/g1CardCounts.cpp	2016-03-08 15:19:27.601788096 -0500
+++ new/src/share/vm/gc/g1/g1CardCounts.cpp	2016-03-08 15:19:27.053757152 -0500
@@ -146,9 +146,8 @@
     HeapRegionClosure(), _card_counts(card_counts) { }
 
 
-  virtual bool doHeapRegion(HeapRegion* r) {
+  virtual void doHeapRegion(HeapRegion* r) {
     _card_counts->clear_region(r);
-    return false;
   }
 };