diff -r 286bee59f34b -r 12eea04c8b06 src/share/vm/memory/dump.cpp
--- a/src/share/vm/memory/dump.cpp	Fri Jun 27 19:12:11 2008 -0700
+++ b/src/share/vm/memory/dump.cpp	Wed Jul 09 15:08:55 2008 -0700
@@ -645,7 +645,7 @@
 class ClearSpaceClosure : public SpaceClosure {
 public:
   void do_space(Space* s) {
-    s->clear();
+    s->clear(SpaceDecorator::Mangle);
   }
 };