emberjs/ember.js — pull request #3831 by stefanpenner (2013-12-01 06:02:14+00:00)
Title: Restore sync assertions

should be safe since: https://github.com/emberjs/ember.js/commit/5ffce14251a313963356299ae0c1575202d00a47

depends on: https://github.com/emberjs/ember.js/pull/3830

- [ ] confirm in more real apps (and with assertion failures)
- [ ] confirm with ember-data