[Bug 1918200] Re: Can't upgrade to Ubuntu 20.04

[Brian Murray]

** Tags removed: rls-ff-incoming

** Also affects: ubuntu-release-upgrader (Ubuntu Focal)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1918200

Title:
  Can't upgrade to Ubuntu 20.04

Status in ubuntu-release-upgrader package in Ubuntu:
  New
Status in ubuntu-release-upgrader source package in Focal:
  New

Bug description:
  Running do-release-upgrade, got the error below:

  
  Traceback (most recent call last):
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/focal", line 8, in <module>
      sys.exit(main())
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeMain.py", line 238, in main
      if app.run():
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeController.py", line 2089, in run
      return self.fullUpgrade()
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeController.py", line 1860, in fullUpgrade
      if not self.prepare():
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeController.py", line 431, in prepare
      self.openCache()
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeController.py", line 214, in openCache
      return self._openCache(lock)
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeController.py", line 242, in _openCache
      lock)
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeCache.py", line 144, in __init__
      self.linux_metapackage = self.quirks._get_linux_metapackage(self, False)
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeQuirks.py", line 845, in _get_linux_metapackage
      source = pkg.candidate.record['Source']
  AttributeError: 'NoneType' object has no attribute 'record'
  Error in sys.excepthook:
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/problem_report.py", line 497, in add_to_existing
      self.write(f)
    File "/usr/lib/python3/dist-packages/problem_report.py", line 450, in write
      block = f.read(1048576)
    File "/usr/lib/python3.6/codecs.py", line 321, in decode
      (result, consumed) = self._buffer_decode(data, self.errors, final)
  UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte

  Original exception was:
  Traceback (most recent call last):
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/focal", line 8, in <module>
      sys.exit(main())
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeMain.py", line 238, in main
      if app.run():
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeController.py", line 2089, in run
      return self.fullUpgrade()
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeController.py", line 1860, in fullUpgrade
      if not self.prepare():
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeController.py", line 431, in prepare
      self.openCache()
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeController.py", line 214, in openCache
      return self._openCache(lock)
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeController.py", line 242, in _openCache
      lock)
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeCache.py", line 144, in __init__
      self.linux_metapackage = self.quirks._get_linux_metapackage(self, False)
    File "/tmp/ubuntu-release-upgrader-tnrwjlhy/DistUpgrade/DistUpgradeQuirks.py", line 845, in _get_linux_metapackage
      source = pkg.candidate.record['Source']
  AttributeError: 'NoneType' object has no attribute 'record'

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.42
  ProcVersionSignature: Ubuntu 5.4.0-42.46~18.04.1-generic 5.4.44
  Uname: Linux 5.4.0-42-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Mon Mar  8 19:22:02 2021
  InstallationDate: Installed on 2021-03-05 (3 days ago)
  InstallationMedia: Ubuntu 18.04.5 LTS "Bionic Beaver" - Release amd64 (20200806.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-03-08 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2021-03-06T11:59:59.599761

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