diff -r 7131f20389fb -r c26474fd5ac0 hotspot/src/share/vm/runtime/handles.inline.hpp
--- a/hotspot/src/share/vm/runtime/handles.inline.hpp	Thu Sep 19 08:47:46 2013 +0200
+++ b/hotspot/src/share/vm/runtime/handles.inline.hpp	Fri Sep 20 09:30:02 2013 -0400
@@ -79,6 +79,7 @@
     } else {                                                           \
       _thread = Thread::current();                                     \
     }                                                                  \
+    assert (_thread->is_in_stack((address)this), "not on stack?");     \
     _thread->metadata_handles()->push((Metadata*)_value);              \
   } else {                                                             \
     _thread = NULL;                                                    \
@@ -95,6 +96,7 @@
     } else {                                                           \
       _thread = Thread::current();                                     \
     }                                                                  \
+    assert (_thread->is_in_stack((address)this), "not on stack?");     \
     _thread->metadata_handles()->push((Metadata*)_value);              \
   } else {                                                             \
     _thread = NULL;                                                    \