arguments misbehaving, can't enumerate keys

[telamon]

Hi I've ran into this issue where the tests pass on Chromium and Firefox but fail on PhantomJS

Here's the test that fails where expected length should be 3 but turns out to be 0

it('SanityTest',function(){
  var array = [1,2,3];
  array.extraMethod = function(){
    expect(arguments.length).toEqual(3); // Passes
    expect(arguments[0]).toEqual(4); // Passes
    console.log(Object.keys(arguments),arguments);
    expect(Object.keys(arguments).length).toBe(3); // <-- Failing
  };
  array.extraMethod(4,5,6);
});

The console.log line output from all three browsers respectively

PhantomJS 1.9.2 (Linux) LOG: [], Object{}
Chromium 30.0.1599 (Ubuntu) LOG: ['0', '1', '2'], Object{0: 4, 1: 5, 2: 6}
Firefox 25.0.0 (Ubuntu) LOG: ['0', '1', '2'], Object{0: 4, 1: 5, 2: 6}

I'm not sure if what i demonstrate above is bad practice, I can still workaround this by using blind ignorance.

for(i=0;i<arguments.length;i++){ arguments[i]; ....} 

But the inconsistency is giving me the chills.

[ariya]

Fixed in Qt5-based master branch.