emberjs/ember.js — pull request #4823 by eventualbuddha (2014-05-06 19:40:24+00:00)
Title: [BUGFIX beta] Fix various issues related to ES6 import correctness.

* Remove duplicate imports.
* Ensure that modules do not declare variables with names matching local imports.

These things are currently allowed by the es6-module-transpiler but not by the ES6 spec.