ros/catkin — pull request #608 by chris-blay (2014-03-20 03:45:55+00:00)
Title: "Notify" user of a cyclic package dependency (part 2 of 2)

See https://github.com/ros/catkin/pull/607

I think I found them all... Hopefully someone remembers to always test for this whenever using topological_order() in the future.