Segfault on Linux with PyQt6

[NMertsch]

After installing pyqt6 and pytest-qt, the following test causes a segfault on Linux, but it works fine on Windows.

Code:

def test(qtbot):
    pass

Output:

[...]
test.py Fatal Python error: Aborted
Current thread 0x00007fca866cdb80 (most recent call first):
  File "/usr/local/lib/python3.11/site-packages/pytestqt/plugin.py", line 76 in qapp
  File "/usr/local/lib/python3.11/site-packages/_pytest/fixtures.py", line 913 in call_fixture_func
[...]
Extension modules: PyQt6.QtCore, PyQt6.QtGui, PyQt6.QtWidgets, PyQt6.QtTest (total: 4)
Aborted

Without the qtbot fixture, it passes.

Repo with CI script reproducing the issue: https://gitlab.com/NMertsch/qtbot-bug-repro

WSL Linux (crash)

• Ubuntu 22.04.3
• Python 3.11.0rc1
• PyQt6 6.6.1
• pytest-qt 4.4.0

Gitlab CI (crash)

• Docker Image python:3.11
• Debian 12
• Python 3.11.8
• PyQt6 6.6.1
• pytest-qt 4.4.0

Windows (works)

• Windows 11
• Python 3.11.8 (installed via Microsoft Store)
• PyQt6 6.6.1
• pytest-qt 4.4.0

[The-Compiler]

Your repro is set to private, but likely you're missing dependencies for Qt to run properly. You'll find out more by adding -s to pytest to disable output capturing, and perhaps also doing export QT_DEBUG_PLUGINS=1.

See the docs for an overview of what libraries Qt generally expects to be installed.

You'd see the same issue with a python -c "from PyQt6.QtWidgets import QApplication; QApplication([])", this is unrelated to pytest or pytest-qt.

[NMertsch]

Thank you, the docs on Github Actions almost did the trick.

Additional things I needed to do:

• apt install libgl1 libegl1 libdbus-1-3 to get rid of "missing .so file" errors
• apt install libxcb-cursor0 because that requirement was added in Qt 6.5.0

I'm currently writing a PR to add this to the docs. Feel free to ignore or modify it :)