shithub: libmujs

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strict mode: Errors when extending non-extensible objects.

--- a/jsproperty.c

+++ b/jsproperty.c

@@ -206,8 +206,12 @@

 {

 	js_Property *result;

-	if (!obj->extensible)

-		return lookup(obj->properties, name);

+	if (!obj->extensible) {

+		result = lookup(obj->properties, name);

+		if (J->strict && !result)

+			js_typeerror(J, "object is non-extensible");

+		return result;

+	}

 	obj->properties = insert(J, obj, obj->properties, name, &result);

 	if (!result->prevp) {