The Tor Browser / file revision

 function TestCase(n, d, e, a)

   this.reason = '';

 function reportCompare (expected, actual, description) {

   var output = "";

   var testcase = new TestCase("unknown-test-name", description, expected, actual);

   testcase.reason = output;

 }

 gcPreserveCode();

 var summary = 'return with argument and lazy generator detection';

 expect = "generator function foo returns a value";

 actual = (function (j)  {}).message;

 reportCompare(expect, actual, summary + ": 1");

 reportCompare(expect, actual, summary + ": 2");

 gcslice(0);

 gcslice(1);

 gc();

 var strings = [ (0), ];

 for (var i = 0; i < strings.length; i++)

   reportCompare(expect, actual, summary + (5e1) + strings[i]);