iOS8 - constraints ambiguously suggest a height of zero

Question

Has anyone got any idea how to debug this?

Warning once only: Detected a case where constraints ambiguously suggest a height of zero for a tableview c

Answer 1

I've also seen this error when using universal storyboards or xibs. If you neglect to specify proper constraints for the Any x Any size class, I've seen this error appear.

Apple seems to have fixed this for iOS9. The error only happened on 8.4 for me.