--- old/src/share/vm/gc/g1/g1OopClosures.hpp	2017-05-31 10:01:15.494035398 +0200
+++ new/src/share/vm/gc/g1/g1OopClosures.hpp	2017-05-31 10:01:15.374031688 +0200
@@ -201,7 +201,7 @@
   G1UpdateRSOrPushRefOopClosure(G1CollectedHeap* g1h,
                                 G1ParPushHeapRSClosure* push_ref_cl,
                                 bool record_refs_into_cset,
-                                uint worker_i);
+                                uint worker_i = 0);
 
   void set_from(HeapRegion* from) {
     assert(from != NULL, "from region must be non-NULL");