Bug#944645: systemd: upgrade breaks dbus

[Martin-Éric Racine]

Since Bullseye already entered the freeze but upstream only got around
reacting to the bug report now, my possibilities for getting crashes
by upgrading something that comes with an init script are slim.

I've compiled systemd packages using this command:

$ DEB_BUILD_OPTIONS="nostrip noopt noudeb" debuild -uc -us

They are versioned 247.3-1.1 just to force an upgrade from my personal repo.

Assuming that the issue really is with daemon-reload, this should have
triggered a crash:

$ for n in $(dpkg -S /etc/init.d/* | cut -f 1 -d: | sort | uniq); do
sudo dpkg-reconfigure $n; done
Job for acpid.socket canceled.
alsa-state.service is a disabled or a static unit not running, not starting it.
Reloading AppArmor profiles
update-rc.d: warning: start and stop actions are no longer supported;
falling back to defaults
update-rc.d: warning: start and stop actions are no longer supported;
falling back to defaults
A reboot is required to replace the running dbus-daemon.
Please reboot the system when convenient.
dbus.service is a disabled or a static unit, not starting it.
dbus.socket is a disabled or a static unit, not starting it.
gdm.service is not active, cannot reload.
invoke-rc.d: initscript gdm3, action "reload" failed.
rescue-ssh.target is a disabled or a static unit, not starting it.
pcscd.service is a disabled or a static unit not running, not starting it.
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools (0.139) ...
update-initramfs: Generating /boot/initrd.img-5.10.0-3-686
saned.socket is a disabled or a static unit not running, not starting it.
insserv: warning: current stop runlevel(s) (1) of script
`smartmontools' overrides LSB defaults (0 1 6).
fstrim.timer is a disabled or a static unit not running, not starting it.
fstrim.service is a disabled or a static unit not running, not starting it.
uuidd.service is a disabled or a static unit not running, not starting it.
update-rc.d: warning: start and stop actions are no longer supported;
falling back to defaults
Job for watchdog.service canceled.
wd_keepalive.service is a disabled or a static unit not running, not
starting it.
$

No crash.

I welcome your thoughts on how to proceed.

Martin-Éric