Hi,

I'm still quite puzzled by this, but I'm relatively confident that
commit 2986ba899f5ee374008c501e26fb653147ed7891 ("gnu: cups: Replace
with 2.4.6 [fixes CVE-2023-34241].") caused the following wxPython /
pygobject script to fail:

--8<---------------cut here---------------start------------->8---
$ guix time-machine --commit=2986ba899f5ee374008c501e26fb653147ed7891 \
  -- shell --rebuild-cache --pure python python-pygobject python-wxpython gtk+ \
  -- ./hang-repro.py
--8<---------------cut here---------------end--------------->8---

Where hang-repro.py contains: