Thank you for your bug report, it sounds similar to https://gitlab.gnome.org/GNOME/gnome-calendar/-/issues/567 which should be fixed in the current serie, upstream mentioned that the code in 3.36 was different though so unsure how practical it would be to backport a fix to that serie
** Bug watch added: gitlab.gnome.org/GNOME/gnome-calendar/-/issues #567 https://gitlab.gnome.org/GNOME/gnome-calendar/-/issues/567 ** Changed in: gnome-calendar (Ubuntu) Importance: Undecided => High ** Changed in: gnome-calendar (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-calendar in Ubuntu. https://bugs.launchpad.net/bugs/1903588 Title: gnome-calendar crashes when trying to remove and add a calendar Status in gnome-calendar package in Ubuntu: Fix Released Bug description: When trying to remove a calendar and add it back in "Manage your calendars", the process crashes. Running it in the debug mode gives the following message: 00:43:09.477633 GcalCalendarManagementPage: DEBUG: Activating GcalCalendarsPage 00:43:09.477853 GcalCalendarManagementPage: DEBUG: Deactivating GcalNewCalendarPage 00:43:15.789479 GcalCalendarMonitor: DEBUG: Tearing down view for calendar birthdays 00:43:16.279497 GcalCalendarMonitor: DEBUG: Starting ECalClientView for calendar 'Birthdays & Anniversaries' 00:43:16.281279 GcalCalendarMonitor: DEBUG: Finished initial loading of calendar 'Birthdays & Anniversaries' ** GcalTimeline:ERROR:../src/core/gcal-timeline.c:212:increase_completed_calendars: assertion failed: (self->completed_calendars <= g_hash_table_size (self->calendars)) Bail out! GcalTimeline:ERROR:../src/core/gcal-timeline.c:212:increase_completed_calendars: assertion failed: (self->completed_calendars <= g_hash_table_size (self->calendars)) Aborted Distro: Ubuntu 20.04.1 LTS Package version details: gnome-calendar: Installed: 3.36.2-0ubuntu1 Candidate: 3.36.2-0ubuntu1 Version table: *** 3.36.2-0ubuntu1 500 500 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 100 /var/lib/dpkg/status 3.36.1-1 500 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages Uname: 5.4.0-52-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-calendar/+bug/1903588/+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