--- old/src/hotspot/share/gc/z/zWeakRootsProcessor.cpp	2018-01-24 11:00:48.875671077 +0100
+++ new/src/hotspot/share/gc/z/zWeakRootsProcessor.cpp	2018-01-24 11:00:48.395650237 +0100
@@ -63,8 +63,8 @@
       _concurrent_weak_roots() {}
 
   virtual void work() {
-    ZPhantomCleanOopClosure cleaning_closure;
-    _concurrent_weak_roots.oops_do(&cleaning_closure);
+    ZPhantomCleanOopClosure cl;
+    _concurrent_weak_roots.oops_do(&cl);
   }
 };