have_posts is empty on category.php

Question

All the applicable code is in this gist.

I have a really simple category.php template. I have 3 posts, each belonging to the same parent category, and 2 belonging to one child category and the third belonging to the other child category.

When I use wp_list_categories to generate the category links, it works fine. But when I click the link to look at any of the categories, I get the else from the have_posts if statement.

Answer 1

OK, it turns out that a simple function on the pre_get_posts filter does the trick. The issue was that custom post types aren't included in the default query.