--- old/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp	2013-05-27 15:27:56.000000000 +0200
+++ new/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp	2013-05-27 15:27:56.000000000 +0200
@@ -2338,6 +2338,7 @@
     q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::flat_profiler));
     q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::management));
     q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::system_dictionary));
+    q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::class_loader_data));
     q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jvmti));
     q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::code_cache));