[Bug 1871490] Re: update-manager crashed with TypeError in update(): argument of type 'NoneType' is not iterable

[Aurileno]

update-manager crashed with TypeError in update

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https://bugs.launchpad.net/bugs/1871490

Title:
  update-manager crashed with TypeError in update(): argument of type
  'NoneType' is not iterable

Status in update-manager package in Ubuntu:
  Fix Released

Bug description:
  crashed

  ProblemType: Crash
  DistroRelease: Ubuntu 20.04
  Package: update-manager 1:20.04.4
  ProcVersionSignature: Ubuntu 5.4.0-23.27-generic 5.4.29
  Uname: Linux 5.4.0-23-generic x86_64
  ApportVersion: 2.20.11-0ubuntu24
  Aptdaemon:
   
  Architecture: amd64
  CrashCounter: 1
  CurrentDesktop: MATE
  Date: Tue Apr  7 23:59:28 2020
  ExecutablePath: /usr/bin/update-manager
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'launch-count' b'3'
   b'com.ubuntu.update-manager' b'launch-time' b'int64 1586293165'
  InstallationDate: Installed on 2020-03-30 (8 days ago)
  InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  InterpreterPath: /usr/bin/python3.8
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/bin/update-manager --no-update --no-focus-on-map
  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 TypeError in update(): argument of type 'NoneType' is not iterable
  UpgradeStatus: Upgraded to focal on 2020-03-31 (7 days ago)
  UserGroups: adm cdrom dip libvirt libvirtd lpadmin plugdev sambashare sudo

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