[Bug 2010913] Re: update-manager crashed with apt_pkg.CacheMismatchError in marked_install(): Object of different cache passed as argument to apt_pkg.DepCache method

[Graham B]

I get the same basic problem too, but with a slight variation.

I'm running XUbuntu 22.04 with latest updates (or at least latest
updates before update itself died!).


ProblemType: Crash
CurrentDesktop: XFCE
Date: Mon Jan  5 10:58:02 2026
ExecutablePath: /usr/bin/update-manager
ExecutableTimestamp: 1649663805
InterpreterPath: /usr/bin/python3.10
ProcCmdline: /usr/bin/python3 /usr/bin/update-manager
ProcCwd: /home/user
ProcEnviron:
LANGUAGE=en_GB:en
PATH=(custom, user)
XDG_RUNTIME_DIR=
LANG=en_GB.UTF-8
SHELL=/bin/bash

Traceback:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/UpdateManager/UpdatesAvailable.py", line 416, in restart_icon_renderer_data_func
    if group_item.pkg and self.pkg_requires_restart(
  File "/usr/lib/python3/dist-packages/UpdateManager/UpdatesAvailable.py", line 391, in pkg_requires_restart
    if pkg is None or pkg.candidate is None:
  File "/usr/lib/python3/dist-packages/apt/package.py", line 1076, in candidate
    cand = self._pcache._depcache.get_candidate_ver(self._pkg)
apt_pkg.CacheMismatchError: Object of different cache passed as argument to apt_pkg.DepCache method
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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https://bugs.launchpad.net/bugs/2010913

Title:
  update-manager crashed with apt_pkg.CacheMismatchError in
  marked_install(): Object of different cache passed as argument to
  apt_pkg.DepCache method

Status in update-manager package in Ubuntu:
  Confirmed

Bug description:
  update-manager have crashed after an update.

  ProblemType: Crash
  DistroRelease: Ubuntu 23.04
  Package: update-manager 1:23.04.1
  ProcVersionSignature: Ubuntu 5.19.0-21.21-generic 5.19.7
  Uname: Linux 5.19.0-21-generic x86_64
  ApportVersion: 2.26.0-0ubuntu2
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Mar 10 20:02:56 2023
  ExecutablePath: /usr/bin/update-manager
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'first-run' b'false'
   b'com.ubuntu.update-manager' b'launch-count' b'37'
   b'com.ubuntu.update-manager' b'launch-time' b'int64 1678474250'
   b'com.ubuntu.update-manager' b'show-details' b'true'
   b'com.ubuntu.update-manager' b'window-width' b'642'
  InstallationDate: Installed on 2023-02-25 (13 days ago)
  InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Alpha amd64 (20230216)
  InterpreterPath: /usr/bin/python3.11
  JournalErrors: -- No entries --
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/bin/update-manager --no-update --no-focus-on-map
  ProcEnviron:
   LANG=fr_FR.UTF-8
   PATH=(custom, user)
   SHELL=/bin/bash
   XDG_RUNTIME_DIR=<set>
  Python3Details: /usr/bin/python3.11, Python 3.11.1, python3-minimal, 3.11.1-3
  PythonArgs: ['/usr/bin/update-manager', '--no-update', '--no-focus-on-map']
  PythonDetails: N/A
  SourcePackage: update-manager
  Title: update-manager crashed with apt_pkg.CacheMismatchError in marked_install(): Object of different cache passed as argument to apt_pkg.DepCache method
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sudo users

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