Crash in meta_context_terminate (somehow related to session ending?)

There's a Fedora downstream report and also a similar Ubuntu one for a gnome-shell crash in meta_context_terminate (context=0x0) at ../src/core/meta-context.c:451 . I'll attach my full threaded backtrace.

Personally I found this crash in investigating a periodic failure in Fedora's openQA tests. We have a test which creates a couple of user accounts and tests logging in and out as each user, and also tests user switching. Sometimes when we try to log out of a session (it happens twice in the test), the system just sits at the user's desktop for a minute and a half before it finally goes back to GDM (usually this should take only a few seconds). Checking the logs from such a failure, I found this crash logged right around the time the session finally ended and GDM came back. I'll also attach journal messages from the same time.

I saw this with current Fedora Rawhide (GNOME 42 alpha), but the other reports date back quite some time.