diff -r a7c0f60a1294 -r 294e48b4f704 hotspot/src/share/vm/gc/g1/g1ParScanThreadState.hpp
--- a/hotspot/src/share/vm/gc/g1/g1ParScanThreadState.hpp	Mon Sep 28 15:05:02 2015 +0200
+++ b/hotspot/src/share/vm/gc/g1/g1ParScanThreadState.hpp	Tue Sep 29 11:02:08 2015 +0200
@@ -75,9 +75,9 @@
 
   InCSetState dest(InCSetState original) const {
     assert(original.is_valid(),
-           err_msg("Original state invalid: " CSETSTATE_FORMAT, original.value()));
+           "Original state invalid: " CSETSTATE_FORMAT, original.value());
     assert(_dest[original.value()].is_valid_gen(),
-           err_msg("Dest state is invalid: " CSETSTATE_FORMAT, _dest[original.value()].value()));
+           "Dest state is invalid: " CSETSTATE_FORMAT, _dest[original.value()].value());
     return _dest[original.value()];
   }