https://bugs.winehq.org/show_bug.cgi?id=47112
--- Comment #5 from Teoh Han Hui teohhanhui@gmail.com ---
I'd report it to QT, it's probably a bug on their end.
It's probably because I built the Qt modules in the wrong order when I upgraded, such that some modules got linked using an older Qt version. I'll try to rebuild in the correct order and try again.