--- a/js/src/jsfun.h
+++ b/js/src/jsfun.h
@@ -195,19 +195,19 @@ class JSFunction : public JSObject
     inline void initEnvironment(JSObject *obj);
 
     static inline size_t offsetOfEnvironment() { return offsetof(JSFunction, u.i.env_); }
     static inline size_t offsetOfAtom() { return offsetof(JSFunction, atom_); }
 
     js::UnrootedScript getOrCreateScript(JSContext *cx) {
         JS_ASSERT(isInterpreted());
         if (isInterpretedLazy()) {
+            js::RootedFunction self(cx, this);
             js::MaybeCheckStackRoots(cx);
-            js::RootedFunction self(cx, this);
-            if (!initializeLazyScript(cx))
+            if (!self->initializeLazyScript(cx))
                 return js::UnrootedScript(NULL);
             return self->u.i.script_;
         }
         JS_ASSERT(hasScript());
         return u.i.script_;
     }
 
     static bool maybeGetOrCreateScript(JSContext *cx, js::HandleFunction fun,