Facebook not redirecting

When I apply the patch {{ url }} is blank. I think the simplest solution would be to update template ln: 40 from

{% if post.link %}
  <div class="fb-link">
    {{ post.link }}
  </div>
{% endif %}

to

{% if post.permalink_url %}
  <div class="fb-link">
    {{ post.permalink_url }}
  </div>
{% endif %}

This allows the teaser_text to remain defined on the settings form.