title: Crash at [self.window makeKeyAndVisible];
body: <p>My application was running fine until today it started to crash at:
      [self.window makeKeyAndVisible];
  in app delegate.</p>
  
  <pre><code>- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
  {
  self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
  // Override point for customization after application launch.
  if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
      self.viewController = [[ViewControllerWordHelper alloc] initWithNibName:@"ViewControllerWordHelper_iPhone1" bundle:nil];
  } else {
      self.viewController = [[ViewControllerWordHelper alloc] initWithNibName:@"ViewControllerWordHelper_iPhone" bundle:nil];
  }
  self.window.rootViewController = self.viewController;
  [self.window makeKeyAndVisible];
  return YES;
  }
  </code></pre>
  
  <p>If I debug and step inside at [self.window makeKeyAndVisible], the next statement before crashing is "@synthesize window = _window;" in the same app delegate.</p>
  
  <p>All the previous versions that used to work behave the same.</p>
  
  <p>I restarted my computer and still the same is happening.  I am using XCode 4.2.  Is there anything in xcode setup that I may have accidentally changed?</p>
  
  <p>Thanks for any help.</p>
  
  <p>The following is the whole debug window:</p>
  
  <pre><code>`GNU gdb 6.3.50-20050815 (Apple version gdb-1708) (Mon Aug 15 16:03:10 UTC 2011)
  Copyright 2004 Free Software Foundation, Inc.
  GDB is free software, covered by the GNU General Public License, and you are
  welcome to change it and/or distribute copies of it under certain conditions.
  Type "show copying" to see the conditions.
  There is absolutely no warranty for GDB.  Type "show warranty" for details.
  This GDB was configured as "x86_64-apple-darwin".sharedlibrary apply-load-rules all
  Attaching to process 440.
  Pending breakpoint 3 - ""ViewControllerWordHelper.m":136" resolved
  Pending breakpoint 4 - ""AppDelegate.m":41" resolved
  Pending breakpoint 5 - ""ViewControllerWordHelper.m":27" resolved
  Pending breakpoint 6 - ""ViewControllerWordHelper.m":166" resolved
  Current language:  auto; currently objective-c
  (gdb) `
  </code></pre>