[Bug 2036302] Re: Apt fails to upgrade when file ownership of packages changes

[Julian Andres Klode]

Packages need to declare the appropriate Replaces and Breaks (or
Conflicts if no later version of the package previously shipping the
file exists)

** Package changed: apt (Ubuntu) => apparmor (Ubuntu)

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Title:
  Apt fails to upgrade when file ownership of packages changes

Status in apparmor package in Ubuntu:
  New

Bug description:
  When running apt-get distupgrade I saw this message:

  Preparing to unpack .../apparmor_4.0.0~alpha2-0ubuntu3_amd64.deb ...
  Unpacking apparmor (4.0.0~alpha2-0ubuntu3) over (4.0.0~alpha2-0ubuntu2) ...
  dpkg: error processing archive /var/cache/apt/archives/apparmor_4.0.0~alpha2-0ubuntu3_amd64.deb (--unpack):
   trying to overwrite '/etc/apparmor.d/usr.bin.lxc-start', which is also in package liblxc-common 1:5.0.1-0ubuntu6
  dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)

  The problem could be overcome with:

  sudo apt-get install liblxc-common --reinstall

  which resulted in output

  Preparing to unpack .../liblxc-common_1%3a5.0.1-0ubuntu6_amd64.deb ...
  Unpacking liblxc-common (1:5.0.1-0ubuntu6) over (1:5.0.1-0ubuntu6) ...

  I have seen the same type of problem before with other packages.

  I would have expected apt-get to correctly sequence all necessary
  actions on its own.

  These are related events in my apt history:

  Start-Date: 2022-10-30  05:33:09
  Commandline: apt-get install lxc
  Requested-By: ubuntu (1000)
  Install:
  liblxc-common:amd64 (1:5.0.0~git2209-g5a7b9ce67-0ubuntu3, automatic)

  Start-Date: 2023-01-28  11:06:34
  Commandline: apt-get dist-upgrade
  Requested-By: ubuntu (1000)
  Upgrade:
  liblxc-common:amd64 (1:5.0.0~git2209-g5a7b9ce67-0ubuntu3, 1:5.0.1-0ubuntu6)

  
  ProblemType: Bug
  DistroRelease: Ubuntu 23.10
  Package: apt 2.7.3
  ProcVersionSignature: Ubuntu 6.5.0-5.5-generic 6.5.0
  Uname: Linux 6.5.0-5-generic x86_64
  NonfreeKernelModules: zfs
  ApportVersion: 2.27.0-0ubuntu2
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: KDE
  Date: Sat Sep 16 11:12:36 2023
  InstallationDate: Installed on 2021-07-01 (807 days ago)
  InstallationMedia: Kubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
  SourcePackage: apt
  UpgradeStatus: No upgrade log present (probably fresh install)

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