This crash doesn't seem to reproduce anymore, and there's no trace of it in e.u.c since version 3.36.4 went in proposed.
❯ apt-cache policy libmutter-6-0 libmutter-6-0: Installed: 3.36.4-0ubuntu0.20.04.2 Candidate: 3.36.4-0ubuntu0.20.04.2 Version table: *** 3.36.4-0ubuntu0.20.04.2 500 500 http://it.archive.ubuntu.com/ubuntu focal-proposed/main amd64 Packages 100 /var/lib/dpkg/status 3.36.3-0ubuntu0.20.04.1 500 500 http://it.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 3.36.1-3ubuntu3 500 500 http://it.archive.ubuntu.com/ubuntu focal/main amd64 Packages ** Tags removed: verification-needed verification-needed-focal ** Tags added: verification-done verification-done-focal -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1857947 Title: gnome-shell crashed with SIGSEGV in get_top_visible_window_actor() from meta_compositor_sync_stack() from meta_stack_tracker_sync_stack() from stack_tracker_sync_stack_later() from call_later_func() To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1857947/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs