--- a/hotspot/src/share/vm/gc/g1/g1OopClosures.cpp	Thu Jun 04 14:29:34 2015 +0200
+++ b/hotspot/src/share/vm/gc/g1/g1OopClosures.cpp	Fri Jun 05 09:50:09 2015 +0200
@@ -51,7 +51,7 @@
   _worker_id = par_scan_state->queue_num();
 
   assert(_worker_id < ParallelGCThreads,
-         err_msg("The given worker id %u must be less than the number of threads " UINTX_FORMAT, _worker_id, ParallelGCThreads));
+         err_msg("The given worker id %u must be less than the number of threads %u", _worker_id, ParallelGCThreads));
 }
 
 // Generate G1 specialized oop_oop_iterate functions.