[Bug 2078356] Re: python3 preinst failure to run pre-rtupdate hooks

[theofficialgman]

The user environment is not copied over to the sudo environment (by
default except with -E is passed or an override is added). What is
likely happening is apt itself (or another debian maintainer script) is
setting the errors variable before the python3 postinst script runs.
Causing the error and entirely out of control of the user. The issue I
found should be fixed asap. It is the only way for the script to exit
without actually detecting any errors (is: without any "error running
python pre-rtupdate hook" output)

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https://bugs.launchpad.net/bugs/2078356

Title:
  python3 preinst failure to run pre-rtupdate hooks

Status in python3-defaults package in Ubuntu:
  Confirmed

Bug description:
  # README first

  If you are hit by this bug, please provide the information asked in
  the comment #53 further down in this page, thanks

  [ Original Description ]

  running python pre-rtupdate hooks for python3.12...
  dpkg: error processing archive /var/cache/apt/archives/python3_3.12.3-0ubuntu2_amd64.deb (--unpack):
   new python3 package pre-installation script subprocess returned error exit status 3
  Preparing to unpack .../libpython3-stdlib_3.12.3-0ubuntu2_amd64.deb ...
  Unpacking libpython3-stdlib:amd64 (3.12.3-0ubuntu2) over (3.12.3-0ubuntu1) ...
  Preparing to unpack .../libsmartcols1_2.39.3-9ubuntu6.1_amd64.deb ...
  Unpacking libsmartcols1:amd64 (2.39.3-9ubuntu6.1) over (2.39.3-9ubuntu6) ...
  Errors were encountered while processing:
   /var/cache/apt/archives/python3_3.12.3-0ubuntu2_amd64.deb
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: python3 3.12.3-0ubuntu1
  ProcVersionSignature: Ubuntu 6.8.0-41.41-generic 6.8.12
  Uname: Linux 6.8.0-41-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia zfs
  ApportVersion: 2.28.1-0ubuntu3.1
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Aug 29 10:52:19 2024
  InstallationDate: Installed on 2024-07-13 (47 days ago)
  InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424)
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
  SourcePackage: python3-defaults
  UpgradeStatus: No upgrade log present (probably fresh install)

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