Boolean operations on open paths create closed paths

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.

I guess it depends on how people uses Inkscape, but the way I use it, I would prefer that boolean operations on open paths gave open paths as result. So for me, it's a bug, not an intended feature. YMMV, of course

Another strange thing I've noticed, I think it's part of the same problem/behaviour: Probably due to the closed-path-restriction, (sub)paths that consist only of one segment (or several colinear segments) are deleted completely. See the attached file for example.

If this should go into a separate report, it's ok, but I think it should belong to this bug's general subject.

Duplicate Bug #245329 provides an excellent example file.

Thank you for posting this bug.

Does this occur in Lucid?

@rusivi1 - I'm a bit confused about your question. No one mentioned that they're using Ubuntu here.

@rusivi - this is a generic Inkscape bug, unrelated to any specific platform port/installation. It is marked 'Incomplete' because a review of the issue by an Inkscape developer was being asked for, to decide on the bug status ('Won't Fix' or 'Confirmed').

I beg your pardon, I will refrain from posting to this or other Inkscape bugs unless I have something to contribute.

I just wanted to add this file for reference. It's using an equivalent boolean operation from Illustrator and the result is the same with it closing the path. It's really odd because AI actually gets other operations with open segments more correct than Inkscape does. Weird.

For the record, I am adding a +1 to this report.

Moved to: https://gitlab.com/inkscape/inbox/issues/1785
Closed by: https://gitlab.com/adambelis