diff -r 6702da6b6082 -r 7c5a1b62f53d src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp
--- a/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp	Tue May 21 11:30:14 2013 +0200
+++ b/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp	Wed May 22 08:04:58 2013 +0200
@@ -3381,7 +3381,6 @@
   assert_locked_or_safepoint(Heap_lock);
   bool result = _virtual_space.expand_by(bytes);
   if (result) {
-    HeapWord* old_end = _cmsSpace->end();
     size_t new_word_size =
       heap_word_size(_virtual_space.committed_size());
     MemRegion mr(_cmsSpace->bottom(), new_word_size);