title: Django bug with a tag
body: <p>My code</p>
  
  <pre><code>{% if GET['search'] % }
              {% block count codes|length as counter %}
  </code></pre>
  
  <p><strong>Is the following a valid if -clause as a Django tag?</strong></p>
  
  <pre><code>{% if GET['search'] % }
  </code></pre>
  
  <p>The following code gives me an error that <em>block</em> takes only one argument.
  <strong>What is wrong in the code?</strong></p>
  
  <pre><code>{% block count codes|length as counter %}
  </code></pre>