title: Crash just after UIView creation
body: <p>I have a crashgroup that I don't understand and which I did not manage to reproduce yet. Does anyone have a clue what is going on here? To me it look like there is a view that is created, and maybe deallocated right away? In fact I also often see reference to the <code>init</code> method of some of my views just before this stacktrace, But the views are varying so it seemes that I have this problem in many places of my app. :-(</p>
  
  <pre><code>Application Specific Information:
  objc_msgSend() selector name: retain
  
  Thread 0 Crashed:
  0   libobjc.A.dylib                      0x0000000182b81bd0 objc_msgSend + 16
  1   Foundation                           0x0000000183dd68e4 -[NSObject(NSKeyValueObserverNotification) willChangeValueForKey:] + 320
  2   QuartzCore                           0x0000000185bf3374 CA::Layer::set_delegate(objc_object*) + 68
  3   UIKit                                0x00000001881f6538 -[UIView _createLayerWithFrame:] + 576
  4   UIKit                                0x00000001881f5ff8 UIViewCommonInitWithFrame + 684
  5   UIKit                                0x00000001881f5ce8 -[UIView initWithFrame:] + 136
  </code></pre>
  
  <p>Is that fact that is says: <code>objc_msgSend() selector name: retain</code> some kind of clue? To me it look like <code>retain</code> is being called, but why should it crash then?</p>