--- old/src/share/vm/gc_implementation/g1/satbQueue.cpp	2014-10-17 10:56:06.706288738 +0200
+++ new/src/share/vm/gc_implementation/g1/satbQueue.cpp	2014-10-17 10:56:06.602292395 +0200
@@ -274,9 +274,10 @@
   shared_satb_queue()->filter();
 }
 
-void SATBMarkQueueSet::set_closure(int i, ObjectClosure* closure) {
+void SATBMarkQueueSet::set_closure(uint worker, ObjectClosure* closure) {
   assert(_closures != NULL, "Precondition");
-  _closures[i] = closure;
+  assert(worker < ParallelGCThreads, "Worker index must be in range [0...ParallelGCThreads)");
+  _closures[worker] = closure;
 }
 
 bool SATBMarkQueueSet::apply_closure_to_completed_buffer(uint worker) {