Python 3.12.4 seg faulting when running pytest with mpl about cpython

[bje-]

Here's the bug: wxWidgets/Phoenix#2455

Not a Python core bug, quite obviously, so closing.

[mdboom]

I can't reproduce this myself, fwiw (on Debian Linux). Seeing sip_api_free in the traceback makes me think this is related to PyQt. Does using a different matplotlib backend resolve the issue? Is it possible to create the crash on a simple PyQt example application alone (without matplotlib and pytest in the mix?)

[bje-]

Thanks for your help. I've managed to remove pytest from the picture with just this:

>>> import matplotlib.pyplot as plt
>>> plt.figure()
<Figure size 640x480 with 0 Axes>
>>> 
Segmentation fault (core dumped)

I'll try a different Matplotlib backend as you suggest.

[bje-]

I switched to the PDF backend and the segfault goes away. The default backend is:

>>> import matplotlib
>>> matplotlib.get_backend()
'WxAgg'

[bje-]

This tiny wxPython test case crashes once the main window is closed. I am using wxPython 4.1.2 installed via pip.

import wx
app = wx.App()
frm = wx.Frame(None, title="Hello World")
frm.Show()
app.MainLoop()