[Bug 1825234] Re: Python3: After do-release-upgrade, all apt-installed modules need to be reinstalled, or they fail

[Launchpad Bug Tracker]

[Expired for ubuntu-release-upgrader (Ubuntu) because there has been no
activity for 60 days.]

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1825234

Title:
  Python3: After do-release-upgrade, all apt-installed modules need to
  be reinstalled, or they fail

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

Bug description:
  I was running 18.10, and used do-release-upgrade from the cli.  It
  seemed to end successfully, and asked to reboot.

  Upon reboot, many/most python-related programs (apport, chrome-gnome-
  shell, ubuntu-bug) failed to work with `ModuleNotFoundError: No module
  named 'certifi'.`.

  I verified that the version being used was Python 3.7 (3.7.3), and
  that python3 pointed to that executable.

  After an `apt install --reinstall` for `certifi` and `idna`, critical
  things like apport are working.

  I don't know if the '--reinstall' was necessary, unfortunately.  I'd
  fixed it before I determined that.

  I did "clear out obsolete packages" during the upgrade.

  My guess is that the requests lib (or some other package) is missing
  some dependencies, but I'm not sure.  I'm not that familiar with the
  mechanics of debian packaging.

  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: ubuntu-release-upgrader-core 1:19.04.16
  Uname: Linux 5.0.8-050008-generic x86_64
  ApportVersion: 2.20.10-0ubuntu27
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: GNOME
  Date: Wed Apr 17 14:37:03 2019
  InstallationDate: Installed on 2018-11-17 (150 days ago)
  InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  Symptom: release-upgrade
  UpgradeStatus: Upgraded to disco on 2019-04-17 (0 days ago)
  VarLogDistupgradeXorgFixuplog:
   INFO:root:/usr/bin/do-release-upgrade running
   INFO:root:No xorg.conf, exiting

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