File: 11.13.2-54-s.js

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// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
es5id: 11.13.2-54-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;
});