--- a/hotspot/src/share/vm/interpreter/bytecodes.cpp	Tue May 25 13:18:49 2010 -0700
+++ b/hotspot/src/share/vm/interpreter/bytecodes.cpp	Thu May 27 09:54:07 2010 -0700
@@ -86,6 +86,7 @@
       return (len > 0 && len == (int)len) ? len : -1;
     }
   }
+  // Note: Length functions must return <=0 for invalid bytecodes.
   return 0;
 }