title: Xcode 7 finding the cause of SIGABRT
body: <p>I am using Xcode 7 beta 5 and creating a multiview application. One view has a button that brings you to a second view, but when this button is pressed it crashes with Thread 1: Signal SIGABRT. </p>
  
  <p>I have checked all the connections of things inside the target view, and everything appears to be ok (I also went through and redid them to be sure). I have tried adding an exception breakpoints which stopped for something, but I am unsure how to find the faulty line. </p>
  
  <p>I have also tried adding breakpoints manually, and have found the following:</p>
  
  <pre><code>@IBOutlet weak var wakeTimeLabel: UILabel!
  @IBAction func snoozeButton(sender: AnyObject) {
      snooze()
  }
  </code></pre>
  
  <p>If I put the breakpoint on the first line there (after all the other outlets), it catches, but when I put it on the function line it throws the SIGABRT. If I remove these two lines completely, the SIGABRT still occurs.</p>
  
  <p>The console contains the following:</p>
  
  <blockquote>
    <p><strong>* Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key whiteSwipe.'
    *</strong> First throw call stack:
    (0x182a2da94 0x197387f80 0x182a2d754 0x1838a3694 0x18829b378 0x1883dd874 0x1829575ac 0x1883dc25c 0x188602fd8 0x1886077c4 0x188607a38 0x188607c94 0x187f755bc 0x187f75538 0x187f5dfa0 0x187f74e50 0x187f74a80 0x187f6dcf0 0x187f3eea4 0x187f3d520 0x1829e50dc 0x1829e4b70 0x1829e2870 0x1829118a0 0x18d96c088 0x187fa60d4 0x1000b4be0 0x197bd68b8)
    libc++abi.dylib: terminating with uncaught exception of type NSException
    (lldb) </p>
  </blockquote>