title: Xcode 8 Adding Layout Margins Crash
body: <p>When I try to add layout margins to a label on a TableViewCell, using the right panel on Xcode, I try to add Explicit Margins (top, Left, Bottom, Right). But, as soon as I input a number value, or tap the arrow to change the value, Xcode crashes.</p>
  
  <p>I've attached a photo to show the panel I am trying to add the layout margins in, and where it crashes.</p>
  
  <p>Any ideas why it wont let me adjust the margins?</p>
  
  <p><img src="https://i.stack.imgur.com/W4UEz.png" alt="Image - Edit Layout Margins Panel"></p>