Comment 1 for bug 168133

Originator: NO

First, thank you for the excellent example image, that makes it very clear
what the problem you're experiencing is.

Unfortunately, while confusing, this is actually intended behavior.
Difference and Intersection are operations intended for closed paths.

If you use the Cut Path operation, you'll see the intended effect (the
open path is cut into two pieces, one of which matches your intended
effect.

While I think this may be a non-bug, I'm assigning to bulia to review.
Bulia, do you think that it might be less confusing if Division and
Intersection were changed to behave as Cut Path in the situation where one
of the objects is an open path? If you think the current behavior is
correct, please close this bug.