angular/angular.js — pull request #4529 by lucassp (2013-10-19 16:32:19+00:00)
Title: fix($httpBackend): Fix for IE9 AJAX request aborting error.

Aborting AJAX requests in IE9 makes the XHR object's properties inaccessible and throws the following error:
```
SCRIPT575: Could not complete the operation due to error c00c023f.
```