On Mon, 8 Sep 2025, Steven A. Falco wrote:
I maintain the KiCad packages. We have a new bug report:
https://bugzilla.redhat.com/show_bug.cgi?id=2393850
Here is the gist of it:
Fatal Python error: _Py_CheckRecursiveCall: Unrecoverable stack overflow
(used -406047 kB) while calling a Python object
I contacted the upstream KiCad devs and got a reply that the following code
appears to be the cause:
import traceback
import sys
sys_version = sys.version
wx_version = ""
exception_output = ""
try:
from wx import version
wx_version = version()
# Import wx modules that re-initialize wx globals, because they break
wxPropertyGrid
# (and probably some other stuff) if we let this happen after we already
have started
# mutating those globals.
import wx.adv, wx.html, wx.richtext
except Exception as e:
exception_output = "".join(traceback.format_exc())
I attached a backtrace for reference. I'm not sure what to do with this. I
don't know if it is a python issue or a wxpython issue or something else
entirely.
Please let me know if the error suggests anything.
Are you able to reproduce the issue outside of kicad using that snippet
above? I cannot.
My hunch is that this might be a pybind11 issue. It looks like kicad is
bundling an older copy that may not support Python 3.14.
See: https://pybind11.readthedocs.io/en/stable/changelog.html
Scott
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