The Tor Browser: js/src/tests/test262/ch11/11.13/11.13.2/S11.13.2_A2.1

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 // Copyright 2009 the Sputnik authors.  All rights reserved.

     2 // This code is governed by the BSD license found in the LICENSE file.

     4 /**

     5  * Operator uses GetValue

     6  *

     7  * @path ch11/11.13/11.13.2/S11.13.2_A2.1_T3.4.js

     8  * @description If GetBase(LeftHandSideExpression) is null, throw ReferenceError. Check operator is "x += y"

     9  */

    11 //CHECK#1

    12 try {

    13   var z = (x += 1);

    14   $ERROR('#1.1: x += 1 throw ReferenceError. Actual: ' + (z));

    15 }

    16 catch (e) {

    17   if ((e instanceof ReferenceError) !== true) {

    18     $ERROR('#1.2: x += 1 throw ReferenceError. Actual: ' + (e));

    19   }

    20 }

The Tor Browser / file revision