--- old/src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp	2013-05-27 15:27:56.000000000 +0200
+++ new/src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp	2013-05-27 15:27:56.000000000 +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;