title: Why is this Stack View layout ambiguous?
body: <p>I'm trying to create a relatively simple (!) layout with iOS 9 Stack Views. This is the Storyboard:</p>
  
  <p><a href="https://i.stack.imgur.com/haCJd.png" rel="noreferrer"><img src="https://i.stack.imgur.com/haCJd.png" alt="enter image description here"></a></p>
  
  <p>With the following layout:</p>
  
  <p><a href="https://i.stack.imgur.com/yZv7j.png" rel="noreferrer"><img src="https://i.stack.imgur.com/yZv7j.png" alt="enter image description here"></a></p>
  
  <p>But it's ambiguous: <code>Titles Stack View: Need constraints for: X position or width</code>, <code>Times Stack View: Need constraints for: X position or width</code>. I don't understand why. I've set the horizontal content hugging priority of the <code>Titles Stack View</code> to less than that of the <code>Times Stack View</code>, what else do I need to do?</p>