I write a small code with PyQt5. There are two bugs I found:

QFileDialog won't showing up sometimes (randomly).

Segmentation happen when running PyQt5 script.

Here is the code, if anyone could confirm that it is Plasma 5 bug. I've asked this issue on stackoverflow, the responses there say my code works just fine and i tried running the program on gnome desktop, everything work just fine. One suggest me to report this on PyQt mailing list. Because I think the problem is on Plasma 5 desktop, so I try to ask here. Please, correct me if this I wrong.

What version of Plasma and KF5 are you running? My guess is that the culprit is the QPA plugin, but IIRC this should have been fixed already.

I'm running Arch Linux, and kf5 installed as group of packages. But, every package inside kf5 group is at version 5.10.0-1 The same goes for plasma. Plasma installed as group of packages. And every package inside plasma group is at 5.3.0-3.