--- a/hotspot/src/share/vm/gc/shared/workgroup.hpp	Mon Sep 28 15:05:02 2015 +0200
+++ b/hotspot/src/share/vm/gc/shared/workgroup.hpp	Tue Sep 29 11:02:08 2015 +0200
@@ -132,7 +132,7 @@
 
   virtual uint active_workers() const {
     assert(_active_workers <= _total_workers,
-           err_msg("_active_workers: %u > _total_workers: %u", _active_workers, _total_workers));
+           "_active_workers: %u > _total_workers: %u", _active_workers, _total_workers);
     assert(UseDynamicNumberOfGCThreads || _active_workers == _total_workers,
            "Unless dynamic should use total workers");
     return _active_workers;