--- a/hotspot/src/share/vm/gc_implementation/g1/concurrentMark.hpp	Wed Apr 10 13:27:35 2013 +0200
+++ b/hotspot/src/share/vm/gc_implementation/g1/concurrentMark.hpp	Wed Apr 10 14:26:49 2013 +0200
@@ -113,6 +113,8 @@
     return res;
   }
 
+  void print_on_error(outputStream* st, const char* prefix) const;
+
   // debugging
   NOT_PRODUCT(bool covers(ReservedSpace rs) const;)
 };
@@ -829,6 +831,8 @@
 
   void print_worker_threads_on(outputStream* st) const;
 
+  void print_on_error(outputStream* st) const;
+
   // The following indicate whether a given verbose level has been
   // set. Notice that anything above stats is conditional to
   // _MARKING_VERBOSE_ having been set to 1