emberjs/ember.js — pull request #4686 by rjackson (2014-04-10 03:08:24+00:00)
Title: [BUGFIX beta] Remove old reference to invoker.

As of 6a8137902da56b8b1060fcd0bdb748d5e7ae0092 we no longer use a custom `invoker`, and the logic was moved into `registerObserver` directly.

Closes #4307 (has many more details).