title: Symfony development toolbar missing for some routes
body: <p>In the process of trying to figure out Symfony I've been doing some of the walk throughs for router/controller which are all working except that one one of them I'm no longer getting the symfony toolbar in the dev environment:</p>
  
  <p><strong>These both work and the development toolbar is present:</strong></p>
  
  <ul>
  <li><code>http://localhost/app_dev.php/app/example</code></li>
  <li><code>http://localhost/app_dev.php/random/111</code></li>
  </ul>
  
  <p><strong>This works but the development toolbar has disappeared:</strong></p>
  
  <ul>
  <li><code>http://localhost/app_dev.php/hello/world</code></li>
  </ul>
  
  <p>I'm not sure if it's related but every now and then throughout the day I'm getting an error returned (and when I resubmit, the error disappears): </p>
  
  <pre><code>ContextErrorException in FileProfilerStorage.php line 137:
  Warning: mkdir(): Permission denied`
  </code></pre>
  
  <hr>
  
  <p>The routing/controller for this hello world test is as follows:</p>
  
  <p><strong>/app/config/routing.yml</strong>:</p>
  
  <pre><code>acme_test2:
      resource: "@AcmeTest2Bundle/Resources/config/routing.yml"
      prefix:   /
  
  app:
      resource: @AppBundle/Controller/
      type:     annotation
  </code></pre>
  
  <p><strong>AppBundle\Controller\DefaultController:</strong></p>
  
  <pre><code>class DefaultController extends Controller
  {
      /**
       * @Route("/app/example", name="homepage")
       */
      public function indexAction()
      {
          return $this-&gt;render('default/index.html.twig');
      }
  
  
      /**
       * @Route("/hello/{name}", name="hello")
       */
      public function helloAction($name)
      {
          return $this-&gt;render('default/hello.html.twig', array(
              'name' =&gt; $name
          ));
      }
  }
  </code></pre>