title: How do I catch 'Uncaught typeError: Cannot read property 'isModel' of undefined' during App load?
body: <p>I'm developing ST2 on Chrome which uses localstorage. From time to time, it appears that the storage schema gets corrupted. When this happens, my app fails during load with "Uncaught typeError: Cannot read property 'isModel' of undefined". The only way to get my app running is to do localstorage.clear() in the console.</p>
  
  <p>I'm assuming this is an ST2 bug, since the occurrence of the corruption seems unrelated to my code, or what I do in my app.</p>
  
  <p>My main question is how do I catch the exception in such a way that either the app can recover, or the user is alerted as to what is going on? Right now, the app simply fails to load. I've tried wrapping the Ext.application() in app.js, but that is executing correctly. My  launch function is not being reached.</p>