[Bug 1936698] Re: check-new-release-gtk crashed with ValueError in require_version(): Namespace Gtk is already loaded with version 4.0

[Brian Murray]

I tested this via an ssh connection and received the AttributeError from
the description. I then installed the version of ubuntu-release-upgrader
from -proposed and no longer received a traceback.

Do you want to continue? [Y/n] Y
Get:1 http://192.168.10.7/ubuntu hirsute-proposed/main amd64 ubuntu-release-upgrader-gtk all 1:21.04.16 [9,460 B]
Get:2 http://192.168.10.7/ubuntu hirsute-proposed/main amd64 ubuntu-release-upgrader-core all 1:21.04.16 [23.6 kB]
Get:3 http://192.168.10.7/ubuntu hirsute-proposed/main amd64 python3-distupgrade all 1:21.04.16 [102 kB]
Fetched 135 kB in 0s (1,792 kB/s)        
(Reading database ... 194561 files and directories currently installed.)
Preparing to unpack .../ubuntu-release-upgrader-gtk_1%3a21.04.16_all.deb ...
Unpacking ubuntu-release-upgrader-gtk (1:21.04.16) over (1:21.04.11) ...
Preparing to unpack .../ubuntu-release-upgrader-core_1%3a21.04.16_all.deb ...
Unpacking ubuntu-release-upgrader-core (1:21.04.16) over (1:21.04.11) ...
Preparing to unpack .../python3-distupgrade_1%3a21.04.16_all.deb ...
Unpacking python3-distupgrade (1:21.04.16) over (1:21.04.11) ...
Setting up python3-distupgrade (1:21.04.16) ...
Setting up ubuntu-release-upgrader-core (1:21.04.16) ...
Setting up ubuntu-release-upgrader-gtk (1:21.04.16) ...
Processing triggers for man-db (2.9.4-2) ...
bdmurray at clean-hirsute-amd64:~$ /usr/lib/ubuntu-release-upgrader/check-new-release-gtk
Unable to init server: Could not connect: Connection refused
Unable to init server: Could not connect: Connection refused
Unable to init server: Could not connect: Connection refused
WARNING:root:timeout reached, exiting

The "Unable to init server" message is due to the fact that I was
connected via ssh.

** Tags removed: verification-needed verification-needed-hirsute
** Tags added: verification-done verification-done-hirsute

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https://bugs.launchpad.net/bugs/1936698

Title:
  check-new-release-gtk crashed with ValueError in require_version():
  Namespace Gtk is already loaded with version 4.0

Status in ubuntu-release-upgrader package in Ubuntu:
  Fix Released
Status in ubuntu-release-upgrader source package in Hirsute:
  Fix Committed

Bug description:
  Impact
  ------
  check-new-release-gtk is crashing on Ubuntu 21.04 if gir1.2-gtk-4.0 is installed on the system and based off the number of crashes at the Ubuntu Error Tracker that seems to be a rather popular package. The crash would prevent users from being notified about Ubuntu 21.10 when it becomes available.

  Test Case
  ---------
  On an Ubuntu 21.04 system
  1) sudo apt-get install gir1.2-gtk-4.0
  2) Run /usr/lib/ubuntu-release-upgrader/check-new-release-gtk

  Observe a Traceback with the contents

  "check-new-release-gtk crashed with ValueError in require_version(): Namespace Gtk is already loaded with version 4.0"
  or
  "AttributeError(\"%r object has no attribute %r\" % (\nAttributeError: ''gi.repository.Gtk'' object has no attribute ''Container''"

  Where Problems May Occur
  ------------------------
  check-new-release-gtk could crash entirely if the additional code is incorrectly written (i.e. there's a syntax error) however the test case does cover that.

  [Original Description]
  ProblemType: Crash
  DistroRelease: Ubuntu 21.10
  Package: ubuntu-release-upgrader-gtk 1:21.10.4
  ProcVersionSignature: Ubuntu 5.11.0-22.23-generic 5.11.21
  Uname: Linux 5.11.0-22-generic x86_64
  ApportVersion: 2.20.11-0ubuntu67
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CrashCounter: 1
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Jul 16 14:19:22 2021
  ExecutablePath: /usr/lib/ubuntu-release-upgrader/check-new-release-gtk
  InstallationDate: Installed on 2016-01-22 (2002 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160117)
  InterpreterPath: /usr/bin/python3.9
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/lib/ubuntu-release-upgrader/check-new-release-gtk
  Python3Details: /usr/bin/python3.9, Python 3.9.6, python3-minimal, 3.9.4-1
  PythonArgs: ['/usr/lib/ubuntu-release-upgrader/check-new-release-gtk']
  PythonDetails: N/ASourcePackage: ubuntu-release-upgrader
  Title: check-new-release-gtk crashed with ValueError in require_version(): Namespace Gtk is already loaded with version 4.0
  UpgradeStatus: Upgraded to impish on 2021-07-16 (0 days ago)
  UserGroups: adm cdrom dip libvirt libvirtd lpadmin lxd plugdev sambashare sudo
  VarLogDistupgradeTermlog:

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