--- a/hotspot/agent/src/share/classes/sun/jvm/hotspot/runtime/StackValue.java	Sat Sep 03 14:03:54 2011 -0700
+++ b/hotspot/agent/src/share/classes/sun/jvm/hotspot/runtime/StackValue.java	Mon Sep 05 17:09:05 2011 -0700
@@ -100,7 +100,7 @@
 
   public int hashCode() {
     if (type == BasicType.getTObject()) {
-      return handleValue.hashCode();
+      return handleValue != null ? handleValue.hashCode() : 5;
     } else {
       // Returns 0 for conflict type
       return (int) integerValue;