title: string value always shows nil in objective C
body: <p>I have upgraded to Xcode 5.0. And when I run an app in debug mode and try to print an  <code>NSString</code> value in console, it gives me the below error. Any ideas?</p>
  
  <pre><code>error: warning: couldn't get cmd pointer (substituting NULL): Couldn't load '_cmd' because its value couldn't be evaluated
  Couldn't materialize struct: the variable 'stringValue' has no location, it may have been optimized out
  Errored out in Execute, couldn't PrepareToExecuteJITExpression
  </code></pre>
  
  <p>Here is the code:</p>
  
  <pre><code>NSString *stringValue = [[self.responseArray objectAtIndex:i] valueForKey:@"merchant_name"]; 
  </code></pre>