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'use strict';
// Copyright (c) 2012 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es5id: 11.13.2-49-s
description: >
Strict Mode - TypeError is thrown if The LeftHandSide of a
Compound Assignment operator(-=) is a reference to a non-existent
property of an object whose [[Extensible]] internal property is
false
flags: [onlyStrict]
---*/
var obj = {};
Object.preventExtensions(obj);
assert.throws(TypeError, function() {
obj.len -= 10;
});
reportCompare(0, 0);