[Bug 1928111] [NEW] python depencies block upgrade from 18.04 towards 20.04

[Nicolas Fourcaud-Trocmé]

Public bug reported:

do-release-upgrade (from 18.04 to 20.04) stops while trying to install
python-is-python2

It says it failed to remove python-minimal and libpython-stdlib (bionic
version 2.7.15~rc1-1 are installed)

I tried to look in details the content of the apt.log file but was not
able to find what could be the problematic package. I do not know if it
is specific of my setup.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.44
ProcVersionSignature: Ubuntu 4.15.0-143.147-generic 4.15.18
Uname: Linux 4.15.0-143-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.23
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: KDE
Date: Tue May 11 17:40:14 2021
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2021-05-11 (0 days ago)

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic dist-upgrade

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https://bugs.launchpad.net/bugs/1928111

Title:
  python depencies block upgrade from 18.04 towards 20.04

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  do-release-upgrade (from 18.04 to 20.04) stops while trying to install
  python-is-python2

  It says it failed to remove python-minimal and libpython-stdlib
  (bionic version 2.7.15~rc1-1 are installed)

  I tried to look in details the content of the apt.log file but was not
  able to find what could be the problematic package. I do not know if
  it is specific of my setup.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.44
  ProcVersionSignature: Ubuntu 4.15.0-143.147-generic 4.15.18
  Uname: Linux 4.15.0-143-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Tue May 11 17:40:14 2021
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-05-11 (0 days ago)

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