title: Thread 1: EXC_BAD_ACCESS (code=1, address=0xf00000c)
body: <p>I have problem with Thread 1: EXC_BAD_ACCESS (code=1, address=0xf00000c) and I don't know how to resolve it.
  It appeared when I change some object in core date and save it and I try to pop this controller to parent. 
  This error is in main() with retVal.
  here is some code</p>
  
  <pre><code>        int retVal;
      @try {
          retVal =  UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
             */\ error is here**
      }
      @catch (NSException *exception) {
          NSLog(@"%@", [exception callStackSymbols]);
          @throw exception;
      }
      return retVal;
  </code></pre>
  
  <p>After re-runing app all my changes are in core data. What is more this problem is only on iOS 7. iOS 6.1 is ok. </p>
  
  <p>Does someone have idea how to resolve it?</p>