src/third_party/mozjs-45/js/src/jit-test/tests/basic/testAddInconvertibleObjectInconvertibleObject.js

function testAddInconvertibleObjectInconvertibleObject()
{
  var count1 = 0;
  function toString1() { ++count1; if (count1 == 95) return {}; return "" + count1; }
  var o1 = {valueOf: undefined, toString: toString1};
  var count2 = 0;
  function toString2() { ++count2; if (count2 == 95) return {}; return "" + count2; }
  var o2 = {valueOf: undefined, toString: toString2};

  var threw = false;
  try
  {
    for (var i = 0; i < 100; i++)
        var q = o1 + o2;
  }
  catch (e)
  {
    threw = true;
    if (i !== 94)
      return "expected i === 94, got " + i;
    if (q !== "9494")
      return "expected q === '9494', got " + q + " (type " + typeof q + ")";
    if (count1 !== 95)
      return "expected count1 === 95, got " + count1;
    if (count2 !== 94)
      return "expected count2 === 94, got " + count2;
  }
  if (!threw)
    return "expected throw with o1 + o2";

  return "pass";
}
assertEq(testAddInconvertibleObjectInconvertibleObject(), "pass");