title: ReactiveCocoa: RAC Objects still in memory after all signals complete
body: <p>I am developing an application on iOS8 based on reactive cocoa. The application mainly does network operations.</p>
  
  <p>I noticed that when  all my signals complete and all signal references are nulled, i see a few RAC* objects still alive in the memory when i checked through instruments. Is this intended  or is my code leaking memory? When i run the signal, there is an activity surge where i see a lot of RAC objects getting allocated and then it falls back to this state as shown the the below screen capture.</p>
  
  <p>Every subsequent invocation ends in this same state. So i am not very worried about it btw.</p>
  
  <p><a href="http://imgur.com/sCL8Y3p" rel="nofollow">http://imgur.com/sCL8Y3p</a></p>
  
  <p>Thanks,</p>