title: Xcode 7.x crashes when editing storyboards
body: <p>Xcode is crashing very often when I edit storyboards.</p>
  
  <p>I'm working with <strong>OS X El Capitan 10.11</strong> and <strong>Xcode 7.0.1</strong> (7A1001).</p>
  
  <p>I've experienced crashes mostly when I edit view background colors and view alphas.</p>
  
  <p>The only way to keep going for the moment has been saving after every edition.</p>
  
  <p>It's really annoying though. Have you experience these crashes? Do you know any workaround? Thanks in advance.</p>
  
  <p><strong>EDIT</strong></p>
  
  <p>It also crashes often when editing constraints.</p>
  
  <p>Here's the crash log:</p>
  
  <pre><code>Process:               Xcode [10557]
  Path:                  /Applications/Xcode.app/Contents/MacOS/Xcode
  Identifier:            com.apple.dt.Xcode
  Version:               7.0.1 (8228)
  Build Info:            IDEFrameworks-8228000000000000~5
  App Item ID:           497799835
  App External ID:       813434267
  Code Type:             X86-64 (Native)
  Parent Process:        ??? [1]
  Responsible:           Xcode [10557]
  User ID:               501
  
  Date/Time:             2015-10-14 12:38:50.754 +0200
  OS Version:            Mac OS X 10.11 (15A284)
  Report Version:        11
  Anonymous UUID:        AE86FBDD-3DF0-170B-2EDC-C5C7B67C46E0
  
  Sleep/Wake UUID:       A5845897-DD62-4799-B12E-DF0EB270E578
  
  Time Awake Since Boot: 95000 seconds
  Time Since Wake:       90000 seconds
  
  System Integrity Protection: enabled
  
  Crashed Thread:        36  Dispatch queue: com.apple.root.user-interactive-qos
  
  Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
  Exception Codes:       KERN_INVALID_ADDRESS at 0x000000012639b000
  Exception Note:        EXC_CORPSE_NOTIFY
  
  VM Regions Near 0x12639b000:
      CG backing stores      0000000126387000-000000012639b000 [   80K] rw-/rw- SM=PRV  
  --&gt; 
      CoreAnimation          000000012639c000-00000001263cb000 [  188K] rw-/rwx SM=PRV  
  
  Application Specific Information:
  ProductBuildVersion: 7A1001
  </code></pre>
  
  <p><strong>EDIT 2</strong></p>
  
  <p>I was hoping that new updates would fix this issue but <strong>Xcode 7.1 (7B91b) is still crashing</strong> when editing constraints in storyboards, using OS X El Capitan 10.11.1</p>