Comment 18 for bug 1848829

This bug was fixed in the package ubuntu-release-upgrader - 1:21.04.2

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ubuntu-release-upgrader (1:21.04.2) hirsute; urgency=medium

  * DistUpgrade/DistUpgradeQuirks.py: ensure there are matches for both regexs
    before trying to use them.
  * DistUpgrade/dist-upgrade.py: When running the release upgrade do not add
    user site directory to sys.path thereby preventing user python packages
    from interfering with the upgrade process. (LP: #1848829)
  * Remove code relevant to peforming a distribution upgrade with a "cdrom" of
    the release to which you are upgrading as it has been hidden and broken
    for quite some time.

 -- Brian Murray <email address hidden> Mon, 09 Nov 2020 11:20:25 -0800