I have marked https://pagure.io/fegistry/issue/2 as blocking https://pagure.io/fegistry/issue/3 and https://pagure.io/fegistry/issue/7, meaning that issue 2 must be done first. When I finished issue 2 I was not allowed to close it, and received this message at the top of the screen:

"You cannot close a ticket that has ticket depending that are still open."

This logic is backwards from the blocking relationship, as in reality I cannot work on issues 3 or 7 until 2 is done.