diff -r 1de8e5356754 -r ad72068ac41e src/share/vm/oops/instanceKlass.cpp
--- a/src/share/vm/oops/instanceKlass.cpp	Mon Dec 09 08:20:45 2013 +0100
+++ b/src/share/vm/oops/instanceKlass.cpp	Tue Dec 10 10:31:00 2013 +0100
@@ -2199,7 +2199,6 @@
     obj, \
     PSParallelCompact::adjust_pointer(p), \
     assert_is_in)
-  obj->update_header(cm);
   return size;
 }