title: iOS prepareforsegue throwing xc_bad
body: <p>I'm using a <code>prepareForSegue</code> method,</p>
  
  <pre><code>override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) {
      if segue.identifier == "roundSegue" {
  
          var selectedRound:NSManagedObject = roundList[self.tableView.indexPathForSelectedRow().row] as NSManagedObject
  
          let SVC: SetupVC = segue.destinationViewController as SetupVC
  
          SVC.course = selectedRound.valueForKey("course") as String
          SVC.existingRound = selectedRound
      }
  
  }
  </code></pre>
  
  <p>However, it is throwing an error "Thread 1:EXC_BAD_INSTRUCTION", on the 'if segue.identifier == "roundSegue"' line...any thoughts on why it would be throwing this error?</p>