http://bugs.winehq.org/show_bug.cgi?id=59003
--- Comment #2 from Dmytro Bagrii dimich.dmb@gmail.com --- (In reply to Rémi Bernon from comment #1)
Thanks for the report, I think it's probably because of a detached monitor
Thank you for quick reply. Indeed, I have second monitor connected, and usually it is inactive. If I activate it before run, the assertion doesn't fail.
https://gitlab.winehq.org/wine/wine/-/merge_requests/9492 should fix this.
I can confirm that with the patch the assertion doesn't fail regardless of second monitor state.