dimagi/commcare-hq — pull request #4366 by NoahCarnahan (2014-09-22 06:25:11+00:00)
Title: Add parent child case type graph cycle detection

Addresses: http://manage.dimagi.com/default.asp?136721

Adds a build error if there are cycles in the parent child selection graph. I was also inspired by the dev summit to write a test :stuck_out_tongue_winking_eye: