--- old/src/share/vm/opto/machnode.hpp	Fri Jul 15 19:09:55 2011
+++ new/src/share/vm/opto/machnode.hpp	Fri Jul 15 19:09:55 2011
@@ -854,7 +854,7 @@
 
   virtual MachOper *clone(Compile* C) const;
 
-  virtual Label *label() const { return _label; }
+  virtual Label *label() const { assert(_label != NULL, "need Label"); return _label; }
 
   virtual uint           opcode() const;