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+/// Copyright (c) 2012 Ecma International. All rights reserved.
+/// Ecma International makes this code available under the terms and conditions set
+/// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
+/// "Use Terms"). Any redistribution of this code must retain the above
+/// copyright and this notice and otherwise comply with the Use Terms.
+/**
+ * @path ch11/11.13/11.13.2/11.13.2-53-s.js
+ * @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 if false
+ * @onlyStrict
+ */
+
+
+function testcase() {
+ "use strict";
+ var obj = {};
+ Object.preventExtensions(obj);
+
+ try {
+ obj.len &= 10;
+ return false;
+ } catch (e) {
+ return e instanceof TypeError;
+ }
+ }
+runTestCase(testcase);