Hi,

during a test with piuparts I noticed your package failed to install
because it tries to overwrite other packages files without declaring a
Breaks+Replaces relation.

See policy 7.6 at
https://www.debian.org/doc/debian-policy/ch-relationships.html#overwriting-files-and-replacing-packages-replaces

From the attached log (scroll to the bottom...):

  Selecting previously unselected package cron-daemon-common.
  Preparing to unpack .../cron-daemon-common_3.0pl1-143_all.deb ...
  Unpacking cron-daemon-common (3.0pl1-143) ...
  dpkg: error processing archive /var/cache/apt/archives/cron-daemon-common_3.0pl1-143_all.deb (--unpack):
   trying to overwrite '/etc/crontab', which is also in package bcron 0.11-9
  Errors were encountered while processing:
   /var/cache/apt/archives/cron-daemon-common_3.0pl1-143_all.deb

  Selecting previously unselected package cron-daemon-common.
  Preparing to unpack .../cron-daemon-common_3.0pl1-143_all.deb ...
  Unpacking cron-daemon-common (3.0pl1-143) ...
  dpkg: error processing archive /var/cache/apt/archives/cron-daemon-common_3.0pl1-143_all.deb (--unpack):
   trying to overwrite '/etc/cron.d/.placeholder', which is also in package systemd-cron 1.15.18-1
  Errors were encountered while processing:
   /var/cache/apt/archives/cron-daemon-common_3.0pl1-143_all.deb

For bcron the conflicting file is only
  /etc/crontab

For systemd-cron the conflicting files are
  /etc/cron.d/.placeholder
  /etc/cron.daily/.placeholder
  /etc/cron.hourly/.placeholder
  /etc/cron.monthly/.placeholder
  /etc/cron.weekly/.placeholder
  /etc/crontab

These two alternative cron implementations need to start using
cron-daemon-common for these shared files first before you can
add the corresponding Breaks+Replaces against them.


cheers,

Andreas

We believe that the bug you reported is fixed in the latest version of
cron, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1012596@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Georges Khaznadar <georgesk@debian.org> (supplier of updated cron package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Mon, 13 Jun 2022 18:33:28 +0200
Source: cron
Architecture: source
Version: 3.0pl1-144
Distribution: unstable
Urgency: medium
Maintainer: Javier Fernández-Sanguino Peña <jfs@debian.org>
Changed-By: Georges Khaznadar <georgesk@debian.org>
Closes: 1012596
Changes:
 cron (3.0pl1-144) unstable; urgency=medium
 .
   * added versioned Conflicts/Replaces clauses for bcron and systemd-cron
     Closes: #1012596
   * added Conflicts/Replaces clauses between cron and other packages providing
     cron-daemon.
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We believe that the bug you reported is fixed in the latest version of
timeshift, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1012596@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Boyuan Yang <byang@debian.org> (supplier of updated timeshift package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Sun, 12 Jun 2022 19:46:42 -0400
Source: timeshift
Architecture: source
Version: 22.06.1-0.1
Distribution: unstable
Urgency: medium
Maintainer: Yanhao Mo <yanhaocs@gmail.com>
Changed-By: Boyuan Yang <byang@debian.org>
Closes: 1012265 1012596
Changes:
 timeshift (22.06.1-0.1) unstable; urgency=medium
 .
   * Non-maintainer upload.
   * Switch to linuxmint upstream. (Closes: #1012265) (LP: #1976627)
   * d/control,d/rules,d/u/metadata: Switch upstream info.
   * New upstream version 22.06.1.
   * debian/: Apply wrap-and-sort -abst.
   * debian/control: Bump Standards-Version to 4.6.1.
   * debian/control: Add new dependency cron-daemon. (Closes: #1012596)
   * Add new build-dep libxapp-dev.
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We believe that the bug you reported is fixed in the latest version of
systemd-cron, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1012596@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Georges Khaznadar <georgesk@debian.org> (supplier of updated systemd-cron package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Mon, 13 Jun 2022 18:14:37 +0200
Source: systemd-cron
Architecture: source
Version: 1.15.18-1.1
Distribution: unstable
Urgency: medium
Maintainer: Debian Systemd Maintainers <pkg-systemd-maintainers@lists.alioth.debian.org>
Changed-By: Georges Khaznadar <georgesk@debian.org>
Closes: 1012596
Changes:
 systemd-cron (1.15.18-1.1) unstable; urgency=medium
 .
   * Non-maintainer upload. (closes: #1012596)
   * added a pre-depends clause on cron-daemon-common, which installs
     templates and directories for crontabs: this package will be a
     common pre-dependency for packages systemd-cron, cron, cronie, bcron.
   * added Conficts/Replaces clauses to interact with other packages
     which provide cron-daemon and do not yet pre-depend on cron-daemon-common
   * modified the list of installed files.
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