This bug has been already fixed as part of 3.36.4-0ubuntu0.20.04.2, and opened by the SRU tool as it is included again in the changelog as it's being part of a debian release we've merged with.
So marking as verified (as discussed with SRU team) ** 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 Desktop Packages, 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() Status in Mutter: Fix Released Status in mutter package in Ubuntu: Fix Released Status in mutter source package in Focal: Fix Committed Bug description: [ Impact ] GNOME Shell crashes [ Test case ] Four-finger gesture seems to trigger it, in any case it can be monitored via - https://errors.ubuntu.com/problem/b0255fcaba794d0a5100e58aeb6f61d2f9d9fe66 [ Regression potential ] Windows might not be closed correctly when requested via delete-events (clicking on clientside decoration close button). ---- The Ubuntu Error Tracker has been receiving reports about a problem regarding gnome-shell. This problem was most recently seen with package version 3.34.1+git20191024-1ubuntu1, the problem page at https://errors.ubuntu.com/problem/b0255fcaba794d0a5100e58aeb6f61d2f9d9fe66 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports. If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/. To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1857947/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp