diff -r 0886b99a4d1b -r eda078b01c65 src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp
--- a/src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp	Fri May 24 14:16:41 2013 +0200
+++ b/src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp	Mon May 27 15:22:59 2013 +0200
@@ -120,6 +120,9 @@
 
     case system_dictionary:
       SystemDictionary::always_strong_oops_do(&mark_and_push_closure);
+      break;
+
+    case class_loader_data:
       ClassLoaderDataGraph::always_strong_oops_do(&mark_and_push_closure, &follow_klass_closure, true);
       break;