title: Xcode clang: error: unable to execute command: Segmentation fault: 11
body: <p>I got this error on Xcode, after updating my buddy's code from svn and building it.</p>
  <blockquote>
  <p>clang: error: unable to execute command: Segmentation fault: 11</p>
  <p>clang: error: linker command failed due to signal</p>
  </blockquote>
  <p>The changes were only on 2 class's implementation files. I tried reverting the code using <code>svn up</code>, cleaning and rebuilding it. (Heck, I even tried restarting Xcode, still I was getting the same issue.) But the next day the updated version was working fine. And I have no clue of what happened!</p>
  <p>I want to know why this error occurred and how did it vanish after a system restart?</p>