title: Ember Cannot read property 'shouldSupercede' of undefined with a new route
body: <p>I've simply added a new route to my application and when I transition to it Ember throws the error "Cannot read property 'shouldSupercede' of undefined".</p>
  
  <p>Here is my router:</p>
  
  <pre><code>App.Router.map ()-&gt;
      @resource 'pages', -&gt;
          @resource 'page', {path: ':page_id'}, -&gt;
              # lots of routes under here, all work
  
      @route 'design' # new route that error happens when transition to
  </code></pre>
  
  <p>I started looking through the router code but I'm really not sure what's going on and hoping that there is something obvious that I'm missing. If I add some logging inside ember the error is actually thrown when it's doing some lookup on the page route here, but again that route itself works fine.</p>
  
  <p>Also it doesn't matter if I'm transitioning from the page route or not, if I just reload the page with it already at the design route I get the same error:</p>
  
  <pre><code>Transitioned into 'design' ember.js?body=1:14464
  Uncaught TypeError: Cannot read property 'shouldSupercede' of undefined 
  </code></pre>