[Bug 1924793] Re: groovy to hirsute on arm64: KeyError: 'ubuntu-desktop-rapsi'

[Dave Jones]

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1924793

Title:
  groovy to hirsute on arm64: KeyError: 'ubuntu-desktop-rapsi'

Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed

Bug description:
  I did a release-upgrade from groovy to hirsute on my groovy pi4, and
  got this backtrace:

  (...)
  KeyError: "The cache has no package named 'ubuntu-desktop-rapsi'"
  Error in sys.excepthook:
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/problem_report.py", line 477, in add_to_existing
      self.write(f)
    File "/usr/lib/python3/dist-packages/problem_report.py", line 430, in write
      block = f.read(1048576)
    File "/usr/lib/python3.8/codecs.py", line 322, 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 "/usr/lib/python3/dist-packages/apt/cache.py", line 281, in __getitem__
      rawpkg = self._cache[key]
  KeyError: 'ubuntu-desktop-rapsi'

  During handling of the above exception, another exception occurred:

  Traceback (most recent call last):
    File "/tmp/ubuntu-release-upgrader-42aqo0hw/hirsute", line 8, in <module>
      sys.exit(main())
    File "/tmp/ubuntu-release-upgrader-42aqo0hw/DistUpgrade/DistUpgradeMain.py", line 236, in main
      if app.run():
    File "/tmp/ubuntu-release-upgrader-42aqo0hw/DistUpgrade/DistUpgradeController.py", line 2024, in run
      return self.fullUpgrade()
    File "/tmp/ubuntu-release-upgrader-42aqo0hw/DistUpgrade/DistUpgradeController.py", line 2005, in fullUpgrade
      self.doPostUpgrade()
    File "/tmp/ubuntu-release-upgrader-42aqo0hw/DistUpgrade/DistUpgradeController.py", line 1395, in doPostUpgrade
      self.quirks.run("PostUpgrade")
    File "/tmp/ubuntu-release-upgrader-42aqo0hw/DistUpgrade/DistUpgradeQuirks.py", line 99, in run
      func()
    File "/tmp/ubuntu-release-upgrader-42aqo0hw/DistUpgrade/DistUpgradeQuirks.py", line 146, in hirsutePostUpgrade
      if cache['ubuntu-desktop-rapsi'].is_installed:
    File "/usr/lib/python3/dist-packages/apt/cache.py", line 283, in __getitem__
      raise KeyError('The cache has no package named %r' % key)
  KeyError: "The cache has no package named 'ubuntu-desktop-rapsi'"

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