title: How does the login check_path route work without default controller/action?
body: <p>I am working on symfony 2.3 project having the following routing code</p>
  
  <pre><code>just2_frontend_logincheck:
      pattern:   /login_check
  </code></pre>
  
  <p>It doesn't have </p>
  
  <pre><code>defaults:{ _controller: testBundle:User:login }
  </code></pre>
  
  <p>But it is working. But I don't know how the routing is working. Is it possible? Please advice me about the routing.</p>