title: Hang on NSManagedObjectContext's save:
body: <p>For some reason sometimes my app will just hang with the following code:</p>
  
  <pre><code>NSError *error;
  if (![self.managedObjectContext save:&amp;error]) {
       NSLog(@"Couldn't save: %@", [error localizedDescription]);
  }
  </code></pre>
  
  <p>It doesn't always hang, just sometimes. If I break on all exceptions then Xcode will break on the save call, but if I turn off breakpoints it will just hang forever, no crashes or anything.</p>
  
  <p>Any ideas?</p>