title: PFFacebookUtils.initializeFacebookWithApplicationLaunchOptions(launchOptions) hangs app
body: <p>Using the latest FB iOS SDKS and Parse, and ParseFacebookUtilsV4</p>
  
  <pre><code> pod 'FBSDKCoreKit'
   pod 'FBSDKShareKit'
   pod 'FBSDKLoginKit'
   pod 'Parse'
   pod 'ParseUI'
   pod 'ParseCrashReporting'
   pod 'ParseFacebookUtilsV4'
  </code></pre>
  
  <p>My application hangs on launch. Here's my app delegate code:</p>
  
  <pre><code>func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -&gt; Bool {
  
      Fabric.with([Crashlytics.self])
      configurePushNotifications(application)
      Parse.enableLocalDatastore()
  
      let configuration = ParseClientConfiguration {
          $0.applicationId = "myapp"
          $0.clientKey = "123123123"
          $0.server = "https://xxxxxx.herokuapp.com/parse"
      }
      Parse.initializeWithConfiguration(configuration)
  
  
      if let launchOptions = launchOptions {
          PFFacebookUtils.initializeFacebookWithApplicationLaunchOptions(launchOptions)
      } else {
          PFFacebookUtils.initializeFacebookWithApplicationLaunchOptions([NSObject:AnyObject]())
      }
  </code></pre>
  
  <p>The last call is causing the app the hang, specifically in the block:</p>
  
  <pre><code>- (PFUserAuthenticationController *)userAuthenticationController {
      __block PFUserAuthenticationController *controller = nil;
      dispatch_sync(_controllerAccessQueue, ^{
          if (!_userAuthenticationController) {
              _userAuthenticationController = [PFUserAuthenticationController controllerWithDataSource:self];
          }
          controller = _userAuthenticationController;
      });
      return controller;
  }
  </code></pre>
  
  <p>Inside <code>PFCoreManager.m</code></p>
  
  <p>I don't believe I am doing anything unusual here, and have tried deleting and reinstalling the app. The same things happens in the emulator.</p>