[Bug 1871392] Re: update-manager crashed with AttributeError in _records(): 'NoneType' object has no attribute 'lookup'

[Steve Langasek]

And the bug report shows this crash happened with python3-apt 1.9.10,
which was a prerelease version of python3-apt before Ubuntu 20.04 LTS
came out.  So I'm surprised another user has just marked this bug as
affecting them, causing the report to bubble up to the top.  We would
need some concrete evidence that this failure happens with released
versions of the software to take further action here.

** Changed in: python-apt (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1871392

Title:
  update-manager crashed with AttributeError in _records(): 'NoneType'
  object has no attribute 'lookup'

Status in python-apt package in Ubuntu:
  Incomplete

Bug description:
  System locked up

  ProblemType: Crash
  DistroRelease: Ubuntu 20.04
  Package: update-manager 1:20.04.1
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  ApportVersion: 2.20.11-0ubuntu24
  Aptdaemon:
   
  Architecture: amd64
  CrashCounter: 1
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Apr  7 09:16:14 2020
  ExecutablePath: /usr/bin/update-manager
  InstallationDate: Installed on 2020-03-01 (36 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  InterpreterPath: /usr/bin/python3.8
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/bin/update-manager --no-update --no-focus-on-map
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
  PythonArgs: ['/usr/bin/update-manager', '--no-update', '--no-focus-on-map']
  PythonDetails: N/A
  SourcePackage: update-manager
  Title: update-manager crashed with AttributeError in _records(): 'NoneType' object has no attribute 'lookup'
  UpgradeStatus: Upgraded to focal on 2020-03-25 (12 days ago)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo

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