emberjs/ember.js — pull request #4375 by rjackson (2014-02-16 04:08:33+00:00)
Title: [BUGFIX beta] Ensure namespaces are cleaned up.

Prior to this change, calls to `Ember.Namespace.byName` would still return the cached class since it was being saved off to `Ember.Namespace.NAMESPACES_BY_ID` but not cleared.

Fixes #4363.