Date Filter: Safari throws error if the date is an Invalid Date.

[QuentinFchx]

Safari's JSON.stringify doesn't handle invalid dates correctly. It throws a RangeError: Invalid Date.
Whenever you try to interpolate an Invalid Date with the date filter, it breaks.
{{ 1/0 | date }} http://plnkr.co/edit/z8xKljNoR1GdsMQypzlq?p=preview

In https://github.com/angular/angular.js/blob/master/src/ng/interpolate.js
parseStringifyInterceptor > stringify > toJson > JSON.stringify

This issue might be too specific for a fix to be included in Angular though. Thoughts ?
I'd be glad to provide a PR.
Something along :

if(isNaN(date.getTime())){
  return '';
}

here https://github.com/angular/angular.js/blob/master/src/ng/filter/filters.js#L489

[petebacondarwin]

In my tests the date filter, on Safari, is returning a Date object correctly. It is just that this object represents an 'invalid' date.
It would seem to me that the problem is in our stringify function, which should catch the error thrown by JSON.stringify for invalid Date objects.

[petebacondarwin]

See http://plnkr.co/edit/IKr0VPSzs2Mh9ORV7iH1?p=preview