Bug#1143867: python3-gi: Triggers crash in cinnamon-screensaver

[Jeremy Bícha]

Control: severity -1 serious
Control: retitle -1 python3-gi: Triggers crash in cinnamon-screensaver

On Fri, Aug 7, 2026 at 5:17 PM Christoph Anton Mitterer
<calestyo at scientia.org> wrote:
> Since upgrading to 3.57.0-2, whenever I lock cinnamon via cinnamon-screensaver,
> and then unlock it,... it crashes after entering the password, apparently
> showing some built-in fallback (which still keeps X locked), and instructs one
> to go to th kernel console, log in and unlock via cinnamon-unlock-desktop).
>
> At the same time I get a segfault:
> Aug 07 16:51:43 heisenberg kernel: cs-backup-locke[2624494]: segfault at 0 ip 00007fa1d3c600cd sp 00007fff6fea5008 error 4 in libgio-2.0.so.0.8800.3[580cd,7fa1d3c46000+122000] likely on CPU 8 (core 16, socket 0)
> Aug 07 16:51:43 heisenberg kernel: Code: 01 00 00 48 8d 35 a9 b8 10 00 48 8d 3d b0 ae 10 00 e8 e7 74 fe ff 0f 1f 80 00 00 00 00 f3 0f 1e fa 48 85 ff 74 0a 48 8b 47 18 <8b> 10 85 d2 74 05 c3 0f 1f 40 00 41 57 41 56 55 53 48 89 fb 48 83

Thank you for taking the time to report this issue promptly. Please
additionally report this issue to the cinnamon maintainers in Debian
and upstream.

We were aware of one crash triggered by the new pygobject version, but
it was determined to be a downstream issue. Maybe the Cinnamon bug has
a similar cause.
https://gitlab.gnome.org/GNOME/pygobject/-/work_items/764

We can temporarily hold the new pygobject in Unstable to allow
maintainers time to fix the issue so I upgraded this bug to RC. We
prefer that the delay last days instead of weeks though.

On behalf of the Debian GNOME team,
Jeremy Bícha