[Bug 2091193] Re: Package conflict found during dist-upgrade

[Miroslav Matějů]

** Bug watch added: github.com/deadsnakes/issues/issues #304
   https://github.com/deadsnakes/issues/issues/304

** Also affects: ubuntu-release-upgrader via
   https://github.com/deadsnakes/issues/issues/304
   Importance: Unknown
       Status: Unknown

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https://bugs.launchpad.net/bugs/2091193

Title:
  Package conflict found during dist-upgrade

Status in Release Upgrader:
  Unknown
Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed

Bug description:
  Hello.

  I attempted to perform a dist-upgrade and it errored out (output not
  captured).  When I tried a second time I received the following
  output:

  ----
  $ sudo apt-get dist-upgrade
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  You might want to run 'apt --fix-broken install' to correct these.
  The following packages have unmet dependencies:
   libpython3.12 : Depends: libpython3.12-stdlib (= 3.12.8-1+focal1) but 3.12.7-1+focal1 is installed
   libpython3.12-dev : Depends: libpython3.12-stdlib (= 3.12.8-1+focal1) but 3.12.7-1+focal1 is installed
   python3.12-dev : Depends: python3.12 (= 3.12.8-1+focal1) but 3.12.7-1+focal1 is installed
   python3.12-venv : Depends: python3.12 (= 3.12.8-1+focal1) but 3.12.7-1+focal1 is installed
  E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
  ----

  When I ran the suggested command I get the following output:

  ----
  $ sudo apt --fix-broken install
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Correcting dependencies... Done
  The following additional packages will be installed:
    libpython3.12-stdlib python3.12
  The following packages will be upgraded:
    libpython3.12-stdlib python3.12
  2 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
  27 not fully installed or removed.
  Need to get 0 B/5,263 kB of archives.
  After this operation, 13.8 MB of additional disk space will be used.
  Do you want to continue? [Y/n] Y
  (Reading database ... 268096 files and directories currently installed.)
  Preparing to unpack .../python3.12_3.12.8-1+focal1_amd64.deb ...
  Unpacking python3.12 (3.12.8-1+focal1) over (3.12.7-1+focal1) ...
  dpkg: error processing archive /var/cache/apt/archives/python3.12_3.12.8-1+focal1_amd64.deb (--unpack):
   trying to overwrite '/usr/bin/python3.12', which is also in package python3.12-minimal 3.12.7-1+focal1
  dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)
  Preparing to unpack .../libpython3.12-stdlib_3.12.8-1+focal1_amd64.deb ...
  Unpacking libpython3.12-stdlib:amd64 (3.12.8-1+focal1) over (3.12.7-1+focal1) ...
  dpkg: error processing archive /var/cache/apt/archives/libpython3.12-stdlib_3.12.8-1+focal1_amd64.deb (--unpack):
   trying to overwrite '/etc/python3.12/sitecustomize.py', which is also in package libpython3.12-minimal:amd64 3.12.7-1+focal1
  dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)
  Errors were encountered while processing:
   /var/cache/apt/archives/python3.12_3.12.8-1+focal1_amd64.deb
   /var/cache/apt/archives/libpython3.12-stdlib_3.12.8-1+focal1_amd64.deb
  E: Sub-process /usr/bin/dpkg returned an error code (1)
  ----

  Other required info:

  1) $ lsb_release -rd
  Description:	Ubuntu 20.04.6 LTS
  Release:	20.04

  2) package versions in conflict identified in the output above

  3) I expected a successful dist-upgrade

  4) Instead I received a failed dist-upgrade as a result of what
  appears to be a package conflict

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.41
  ProcVersionSignature: Ubuntu 5.4.0-200.220-generic 5.4.284
  Uname: Linux 5.4.0-200-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.27
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  Date: Fri Dec  6 19:31:56 2024
  InstallationDate: Installed on 2021-01-15 (1421 days ago)
  InstallationMedia: Ubuntu 16.04.7 LTS "Xenial Xerus" - Release amd64 (20200806)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_CA:en
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  Symptom: dist-upgrade
  UpgradeStatus: Upgraded to focal on 2023-06-04 (551 days ago)
  VarLogDistupgradeXorgFixuplog:
   INFO:root:/usr/bin/do-release-upgrade running
   INFO:root:No xorg.conf, exiting

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