[Bug 2069856] Re: installation fails in the presence of foreign packages

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/2069856

Title:
  installation fails in the presence of foreign packages

Status in subiquity:
  Invalid
Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed

Bug description:
  I tried upgrading the Ubuntu Desktop 23.10 installation on my amd64
  laptop to 24.04, but it failed with the following error (I'll attach a
  more complete installation log):

  ```
  Errors were encountered while processing:
   xdg-desktop-portal-gtk
   libgck-2-2:amd64
   libpython3.12-stdlib:amd64
   libpython3.12-stdlib:arm64
   libgcr-4-4:amd64
   libnma-gtk4-0:amd64
   network-manager-gnome
   python3.12
   libnma0:amd64
   spice-client-glib-usb-acl-helper
   yelp
   libyelp0:amd64
   libpython3.12-dev:amd64
   libpython3.12-dev:arm64
   zenity
   libpython3.12t64:amd64
   libpython3.12t64:arm64
   gir1.2-gcr-4:amd64
   mutter-common-bin
   gir1.2-gck-2:amd64
   at-spi2-core
   texlive-binaries
   perl-debug
   keyboard-configuration
   xdg-user-dirs-gtk
   libpython3-stdlib:amd64
   console-setup
   libpython3-dev:amd64
   libpython3-dev:arm64
   kbd
   console-setup-linux
   initramfs-tools
  Traceback (most recent call last):
    File "/usr/lib/ubuntu-advantage/convert_list_to_deb822.py", line 12, in <module>
      from aptsources.sourceslist import SourceEntry  # type: ignore
      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/aptsources/__init__.py", line 3, in <module>
      import apt_pkg
  ModuleNotFoundError: No module named 'apt_pkg'
  Traceback (most recent call last):
    File "/usr/lib/ubuntu-advantage/upgrade_lts_contract.py", line 10, in <module>
      from uaclient import http, upgrade_lts_contract
    File "/usr/lib/python3/dist-packages/uaclient/upgrade_lts_contract.py", line 30, in <module>
      from uaclient import contract, defaults, messages, system, util
    File "/usr/lib/python3/dist-packages/uaclient/contract.py", line 7, in <module>
      from uaclient import (
    File "/usr/lib/python3/dist-packages/uaclient/version.py", line 8, in <module>
      from uaclient.apt import (
    File "/usr/lib/python3/dist-packages/uaclient/apt.py", line 13, in <module>
      import apt_pkg  # type: ignore
      ^^^^^^^^^^^^^^
  ModuleNotFoundError: No module named 'apt_pkg'

  Upgrade complete

  The upgrade has completed but there were errors during the upgrade
  process.
  ```

  I created a btrfs snapshot before the upgrade so I reverted back to
  it, removed all i386, armhf and arm64 foreign architecture packages I
  had installed and tried again. This time the upgrade worked fine.

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