The Tor Browser / file revision

 /*

  * Any copyright is dedicated to the Public Domain.

  * http://creativecommons.org/licenses/publicdomain/

  */

 var expect = 'SyntaxError: duplicate argument names not allowed in this context';

 var actual = 'No error';

 var a = [];

 // Test up to 200 to cover tunables such as js::PropertyTree::MAX_HEIGHT.

 for (var i = 0; i < 200; i++) {

     a.push("b" + i);

     try {

         eval("(function ([" + a.join("],[") + "],a,a){})");

     } catch (e) {

         actual = '' + e;

     }

     assertEq(actual, expect);

 }

 reportCompare(0, 0, "ok");