diff -r ef0373b55136 -r 758a864f9613 src/script/api/qscriptvalue_p.h
--- a/src/script/api/qscriptvalue_p.h	Fri Sep 17 08:34:18 2010 +0300
+++ b/src/script/api/qscriptvalue_p.h	Mon Oct 04 01:19:32 2010 +0300
@@ -103,7 +103,7 @@
 
     qint64 objectId()
     {
-        if ( (type == JavaScriptCore) && (engine) )
+        if ( (type == JavaScriptCore) && (engine) && jscValue.isCell() )
             return (qint64)jscValue.asCell();
         else
             return -1;