emberjs/ember.js — pull request #9309 by jayphelps (2014-10-12 05:45:09+00:00)
Title: Warn if FEATURES flagging is used in non-canary build. Fixes #9302

My approach of regexing `Ember.VERSION` seems brittle...but I'm not aware of any other way to know. Comments/suggestions welcome, especially if you can reduce the amount of code this takes.