Hmm, nope. We only reject the empty boxes, but allow negative boxes to represent counter winding. That's cunning.
Ok, found the problem. It's the traps-to-boxes routine that doesn't prefilter zero height traps/boxes.
Hmm, nope. We only reject the empty boxes, but allow negative boxes to represent counter winding. That's cunning.
Ok, found the problem. It's the traps-to-boxes routine that doesn't prefilter zero height traps/boxes.