pivotal/cedar — pull request #86 by joemasilotti (2013-07-18 18:53:11+00:00)
Title: Retain invocation arguments

Fixes Lenny's issue of [EXC_BAD_ACCESS on double cleanup when it has been messaged with a block that leaves a dispatch group](https://www.pivotaltracker.com/story/show/53327591).

Resubmitting as Travis CI build failed under certain iOS version combinations (unreproducible locally).