title: Symfony 3.0 - Cannot load resource "." - Custom Route Loader
body: <p>I am working on upgrading one of my projects to SF 3:<br>
  The project uses some custom routing loaders which where working without problems before, now I am getting a <code>FileLoaderLoadException</code> stating that the <code>resource "."</code> couldn't be loaded.</p>
  
  <p>I took a look at the documentation: <a href="http://symfony.com/doc/current/cookbook/routing/custom_route_loader.html" rel="nofollow">http://symfony.com/doc/current/cookbook/routing/custom_route_loader.html</a></p>
  
  <p>But either nothing has changed or the documentation has not been updated.</p>
  
  <p>My routing.yml configuration looks like this:</p>
  
  <pre><code>custom_sidebar_routing:
      resource: .
      type: sidebar
  </code></pre>
  
  <p>Can someone give me a hint what is wrong here or can confirm that this is a bug inside symfony core?</p>