title: Xcode 8.2.1 quits unexpectedly every time when I open my project
body: <p>I'm getting an error Xcode 8.2.1 quit unexpectedly whenever Xcode is opened. This was working fine till last night. I have tried restart system but didn't worked.I have updated mac OS with macOS Sierra (version 10.12.3).</p>
  
  <p>I already deleted derived data from preferences but it's not working for me.</p>
  
  <p>please tell me why its happening like this...Thanks a lot in advance...</p>