Python GC destroys PyGObject with external references
python-gobject-3.34 on ArchLinux, Fedora 31 and Fedora 32
https://bugzilla.gnome.org/show_bug.cgi?id=731501 looks back.
Many segfaults in Eolie web browser.
Backtrace in linked bug report: https://bugs.webkit.org/show_bug.cgi?id=206941