Bug#1137013: gnome-calendar: Segfault when displaying "Birthdays & Anniversaries" calendar
Alex Canepa
alex at canepa.me
Mon May 18 16:54:32 BST 2026
Package: gnome-calendar
Version: 50.0-1
Severity: important
X-Debbugs-Cc: alex at canepa.me
Dear Maintainer,
`gnome-calendar` is crashing when attempting to synchronize and display the birthdays calendar.
I noticed that my calendar had stopped displaying birthday events for contacts in my connected Google Account. Per an upstream bug (https://gitlab.gnome.org/GNOME/gnome-contacts/-/work_items/370), I followed their advice to (temporarily) install the Evolution GUI app and enable the "Birthdays" field for that address book. I then uninstalled `evolution` and refreshed my calendars.
The birthdays now correctly display in month view but not in week view. Additionally, the applications crashes when I attempt to move forwards or backwards in time in either view. Below are the relevant lines from `journalctl`.
I'm not sure whether this bug also involves `evolution-data-server` or `gnome-contacts`, but neither of those appeared in `journalctl`. Let me know if I should use the debugger or take other steps to provide more helpful information.
Thanks in advance.
debian dbus-daemon[2685]: [session uid=1000 pid=2685 pidfd=5] Activating service name='org.gnome.Calendar' requested by ':1.20' (uid=1000 pid=2919 comm="/usr>
debian dbus-daemon[2685]: [session uid=1000 pid=2685 pidfd=5] Successfully activated service 'org.gnome.Calendar'
debian gnome-calendar[56167]: The resource style-dark.css is deprecated and shouldn't be used anymore. Use style.css with media queries instead.
debian gnome-calendar[56167]: The resource style-hc.css is deprecated and shouldn't be used anymore. Use style.css with media queries instead.
debian gnome-calendar[56167]: The resource style-hc-dark.css is deprecated and shouldn't be used anymore. Use style.css with media queries instead.
debian gnome-calendar[56167]: Running Calendar as a service
debian gnome-calendar[56167]: g_atomic_ref_count_dec: assertion 'old_value > 0' failed
debian gnome-calendar[56167]: Error adding event 'Birthday: <redacted>' to the week header
debian gnome-calendar[56167]: Error adding event 'Birthday: <redacted>' to the week header
debian gnome-calendar[56167]: Event with uuid: <redacted>@google.com not in GcalMonthView
debian gnome-calendar[56167]: Error adding event 'Birthday: <redacted>' to the week header
debian gnome-calendar[56167]: Error adding event 'Birthday: <redacted>' to the week header
debian gnome-calendar[56167]: Error adding event 'Birthday: <redacted>' to the week header
debian gnome-calendar[56167]: Error adding event 'Birthday: <redacted>' to the week header
debian gnome-calendar[56167]: Error adding event 'Birthday: <redacted>' to the week header
debian gnome-calendar[56167]: Error adding event 'Birthday: <redacted>' to the week header
debian gnome-calendar[56167]: Error adding event 'Birthday: <redacted>' to the week header
debian kernel: gnome-calendar[56167]: segfault at 55b79c7215eb ip 00007fc7d5fe639b sp 00007ffe31a7e198 error 4 in libgtk-4.so.1.2200.3[1e639b,7fc7d5ee2000+55>
debian kernel: Code: f9 48 89 da 4c 89 f6 48 89 ef 48 8b 40 20 48 83 c4 08 5b 5d 41 5e 41 5f ff e0 0f 1f 44 00 00 f3 0f 1e fa 48 63 05 f5 17 a1 00 <48> 8b 04>
-- System Information:
Debian Release: forky/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 6.17.13+deb14-amd64 (SMP w/4 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_WARN, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages gnome-calendar depends on:
ii dconf-gsettings-backend [gsettings-backend] 0.49.0-4+b1
ii gsettings-desktop-schemas 50~alpha-1
ii libadwaita-1-0 1.9.0-1
ii libc6 2.42-16
ii libecal-2.0-3 3.56.2-8+b1
ii libedataserver-1.2-27t64 3.56.2-8+b1
ii libedataserverui4-1.0-0t64 3.56.2-8+b1
ii libfribidi0 1.0.16-5+b1
ii libgeoclue-2-0 2.8.1-1
ii libglib2.0-0t64 2.88.0-1
ii libgraphene-1.0-0 1.10.8-5+b2
ii libgtk-4-1 4.22.3+ds-1
ii libgweather-4-0t64 4.4.4-4
ii libical3t64 3.0.20-2+b1
ii libsoup-3.0-0 3.6.6-1
Versions of packages gnome-calendar recommends:
ii evolution-data-server 3.56.2-8+b1
gnome-calendar suggests no packages.
-- no debconf information
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