pick_multi_file, AssertionError

[BioTurboNick]

Unfortunately this was on someone else's computer, so I have a photo instead of copy-paste.

When I open the dialog, this error appears. The dialog seems to function but then returns nothing to the calling code.

[Suavesito-Olimpiada]

I can reproduce the error on my machine (Linux), I'll look at what could be triggering the segfault.

[Suavesito-Olimpiada]

I think this might be caused because you have both Gtk and NativefileDialog used. I'm not qualified to properly debug this, but maybe @timholy could help us here.