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

[Tarık Buğra]

i m trying daily builds(current, today's) i have a ssd and a hdd, i
tried to install ubuntu at hdd but it was confusing cuz all
partitions(both hdd and ssd) were together at list. it said somethings
that make me understand it may effect my ssd disk even if i choose hdd
partitions for "efi" and "/" installation. but i thought ubuntu wouldnt
do that. i trusted it. at end of installation i faced an error that says
i may need to install somethings after i run ubuntu at short.then  i
restarted pc and saw a boot option for ubuntu  with ssd word near it,
which is i was afraid:/. and now while trying ubuntu suddenly update
manager crashed i guess. yesderday i installed lubuntu, there was no
problem after installation. so i dont think my laptop is bad for ubuntu.
im using Asus X550L.

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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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