Bug#1055863: systemd has an undeclared file conflict

[Helmut Grohne]

Package: systemd
Version: 254.5-1~bpo12+1
Severity: normal
User: debian-qa at lists.debian.org
Usertags: fileconflict
Control: affects -1 + udev
Tags: bookworm

systemd has an undeclared file conflict. This may result in an unpack
error from dpkg.

The files
 * /lib/systemd/system/sysinit.target.wants/systemd-hwdb-update.service
 * /lib/systemd/system/systemd-hwdb-update.service
are contained in the packages
 * systemd/254.5-1~bpo12+1 as present in bookworm-backports
 * udev/247.3-7+deb11u4 as present in bullseye|bullseye-updates

These packages can be unpacked concurrently, because there is no
relevant Replaces or Conflicts relation. Attempting to unpack these
packages concurrently results in an unpack error from dpkg, because none
of the packages installs a diversion for the affected files.

Given feedback from d-devel, we do not consider bullseye ->
bookworm-backports a valid upgrade path. However, removing this case
from dumat is very tricky. Hence, I file this bug anway though at normal
severity and ask you to add Breaks+Replaces for this unsupported case in
your next backport such that the diagnostic is removed from the dumat
output. Also a -sloppy backport would cause an rc bug here. Hope that
works for you.

Kind regards

The Debian Usr Merge Analysis Tool

This bug report has been automatically filed with no human intervention.
The source code is available at https://salsa.debian.org/helmutg/dumat.
If the filing is unclear or in error, don't hesitate to contact
helmut at subdivi.de for assistance.