emberjs/ember.js — pull request #4125 by mixonic (2014-01-11 23:44:38+00:00)
Title: [BUGFIX beta] Silently fail when disconnecting from an inactive view

If the parent of an outlet has already been disconnected, we should allow `disconnectOutlet` to be called with the child and fail silently. Currently `null has no method disconnectOutlet` is raised.