QStyleFactory.create SIGSEGV on MacOS

[Qoissi]

Hello,

This simple script is generating a SIGSEGV fault on my configuration:

from PyQt6 import QtWidgets
s = QtWidgets.QStyleFactory.create('macOS')

My configuration:

• MacOS Monterey 12.6
• Python 3.10.8
• PyQt6

Note that if other styles like 'Fusion' or 'Windows' are used this doesn't fail.
You might argue that creating a 'macOS' style on Macintosh is useless as this is anyway the default style, but that's not my point...

Any idea on how to fix that?

Many thanks.

[SGaist]

Hi,

M1 or Intel ?

[Qoissi]

My Mac is an Intel one but I could check on another Mac with M1 and same result.
Also checked with Python 3.9.x -> same.
Issue looks highly reproduceable...

[SGaist]

How did you install these ? Brew ? Pip ? Conda ? A mix of them ?

[SGaist]

I can confirm the crash, unless you create a QApplication object before calling create.

You should check with the Riverbank Computing folks about that matter.

[Qoissi]

Ok thanks, what's the best way to reach them about issues like that?
Do you recommend using the dedicated mailing list?
https://www.riverbankcomputing.com/mailman/listinfo/pyqt

[Qoissi]

In between thanks for your workaround, I thought QApplication.setStyle() needed to be called before creating QApplication object but actually it works also perfectly just after and this prevents to have this SIGSEGV core... I believe we can consider this issue as solved. Thanks again.

[SGaist]

I tested with PySide6 and Qt 6.4.0 and the same crashes happens so PyQt is innocent in that matter.

I'll open a bug report later.

[SGaist]

Reported as QTBUG-108047