title: Error creating LLDB target at path, Xcode 6 GM seed,the screen stuck
body: <p>I'm getting this error sometimes when I build in Xcode 6 GM Seed. </p>
  
  <p>I had the following error:</p>
  
  <pre><code>Warning: Error creating LLDB target at path '.....'- using an empty LLDB target which can cause slow memory reads from remote devices.
  </code></pre>
  
  <p>Then my app become very slow on some page;and what's worse is that whenever my code response the method of [NSUserDefaults standardUserDefaults]... the screen stuck and the warning following;</p>
  
  <p>I don't konw why;
  What exactly does this mean and how do I fix it?</p>
  
  <p>PS:It seems like the xcode doesn't create the .plist file when the method of [NSUserDefaults standardUserDefaults]... been used;I open the sandbox and I can't find nothing in the related files.</p>