ReactiveCocoa/ReactiveCocoa — pull request #863 by kastiglione (2013-10-12 00:11:44+00:00)
Title: Break parent child disposable reference cycle

Fixes #860

Check that, *I believe* this fixes #860, fixing an overlooked retain cycle introduced in #830, where serial disposables in `-bind:` are being captured strongly by subscription blocks, and those subscription disposables are being strongly referenced by the serial disposable. Ultimately there's a cycle between a a serial disposable and its subordinate disposable.