title: ibtoold(2546,0x11208c000) malloc: *** auto malloc[2546]: error
body: <p>I've been getting this error since I upgraded to OSX 10.9 Mavericks. Can anyone tell me what is happening? The app doesn't crash but I get this annoying error everytime I compile. Is there a way to fix this?</p>
  
  <pre><code>ibtoold(2546,0x11208c000) malloc: *** auto malloc[2546]: error: GC operation on unregistered thread. Thread registered implicitly. Break on auto_zone_thread_registration_error() to debug.Command /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/ibtool emitted errors but did not return a nonzero exit code to indicate failure
  
  
  /ibtoold(2546,0x11208c000) malloc: GC operation on unregistered thread. Thread registered implicitly. Break on auto_zone_thread_registration_error() to debug.
  
  
  Command /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/ibtool emitted errors but did not return a nonzero exit code to indicate failure
  </code></pre>