title: Twig's dump function returns a blank screen
body: <p>I am using Twig's <a href="http://twig.sensiolabs.org/doc/functions/dump.html" rel="noreferrer">dump</a> function in Symfony2. I have configured Symfony according to <a href="http://symfony.com/doc/2.0/book/templating.html#debugging" rel="noreferrer">its instructions</a>.</p>
  
  <p>I have a <code>page</code> variable, and an <code>orders</code> array. <code>dump</code> works on page, but not orders. When I call it on orders, I get a white screen - no php errors or anything. I have no idea how to debug this. </p>
  
  <p>Any ideas?</p>