diff -r a7c0f60a1294 -r 294e48b4f704 hotspot/src/share/vm/gc/shared/workgroup.cpp
--- a/hotspot/src/share/vm/gc/shared/workgroup.cpp	Mon Sep 28 15:05:02 2015 +0200
+++ b/hotspot/src/share/vm/gc/shared/workgroup.cpp	Tue Sep 29 11:02:08 2015 +0200
@@ -140,7 +140,7 @@
     _end_semaphore->wait();
 
     // No workers are allowed to read the state variables after the coordinator has been signaled.
-    assert(_not_finished == 0, err_msg("%d not finished workers?", _not_finished));
+    assert(_not_finished == 0, "%d not finished workers?", _not_finished);
     _task    = NULL;
     _started = 0;