title: Trivial modification of storyboard causes crash in XCode
body: <p>I created a brand new project in XCode (12.4).  I chose &quot;Game&quot;, which creates a simplistic SCeneKit project.  All fine so far.  Builds and runs, with the little jet aircraft toodling around.</p>
  <p>But if I add ANYTHING to the storyboard, for example just a label, the project builds fine, but when started it errors out:</p>
  <p><a href="https://i.stack.imgur.com/QYB8O.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/QYB8O.png" alt="enter image description here" /></a></p>
  <p>The view looks like this:</p>
  <p><a href="https://i.stack.imgur.com/XBpe8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XBpe8.png" alt="enter image description here" /></a></p>
  <p>The error occurs here:</p>
  <pre><code>   // retrieve the SCNView
      let scnView = self.view as! SCNView
      
  </code></pre>
  <p>This is similar to a problem reported here:</p>
  <p><a href="https://stackoverflow.com/questions/35323147/could-not-cast-value-of-type-uiview-to-scnview">Could not cast value of type &#39;UIView&#39; to &#39;SCNView&#39;</a></p>
  <p>But as far as I can tell, that problem and mine are different.  Any suggestions are welcome</p>