pivotal/PivotalCoreKit — pull request #94 by dshusta (2014-10-23 16:54:39+00:00)
Title: Tapping on a collection view cell that isn't in a collection view proper...

...ly trips the assertion.

Was giving an inscrutable error ("UICollectionCell doesn't respond to -indexPathForCell:" or similar) rather than a useful one ("cell must be in a collection view").