[Bug 1824866] Re: python3-distupgrade missing a dep on python3-distro-info

[Launchpad Bug Tracker]

This bug was fixed in the package ubuntu-release-upgrader - 1:18.04.33

---------------
ubuntu-release-upgrader (1:18.04.33) bionic; urgency=medium

  * DistUpgrade/DistUpgradeViewNonInteractive.py: when responding to a
    conffile prompt with "n" use bytes not a string. (LP: #1796193)
  * debian/control: add an explicit python3-distro-info dependency to
    python3-distupgrade as it is now required by DistUpgradeController.
    (LP: #1824866)
  * pre-build.sh: stop updating demotions for artful since it is no longer
    available at archive.ubuntu.com and if we do update then demotions becomes
    an empty file which is wrong.

 -- Brian Murray <brian at ubuntu.com>  Wed, 15 May 2019 10:37:15 -0700

** Changed in: ubuntu-release-upgrader (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1824866

Title:
  python3-distupgrade missing a dep on python3-distro-info

Status in ubuntu-release-upgrader package in Ubuntu:
  Fix Released
Status in ubuntu-release-upgrader source package in Bionic:
  Fix Released

Bug description:
  [Impact]
  Release upgrades on a system w/o python3-distro-info will crash.

  [Test Case]
  On a bionic-amd64 chroot:

  (bionic-amd64)root at impulse:/home/bdmurray/Documents# do-release-upgrade
  Checking for a new Ubuntu release
  Get:1 Upgrade tool signature [819 B]
  Get:2 Upgrade tool [1250 kB]
  Fetched 1251 kB in 0s (0 B/s)
  authenticate 'cosmic.tar.gz' against 'cosmic.tar.gz.gpg'
  extracting 'cosmic.tar.gz'

  A fatal error occurred

  Please report this as a bug and include the files
  /var/log/dist-upgrade/main.log and /var/log/dist-upgrade/apt.log in
  your report. The upgrade has aborted.
  Your original sources.list was saved in
  /etc/apt/sources.list.distUpgrade.

  Traceback (most recent call last):

  File "/tmp/ubuntu-release-upgrader-wvzfz5ou/cosmic", line 8, in
  <module>
  sys.exit(main())

  File
  "/tmp/ubuntu-release-upgrader-wvzfz5ou/DistUpgrade/DistUpgradeMain.py",
  line 224, in main
  from .DistUpgradeController import DistUpgradeController

  File
  "/tmp/ubuntu-release-upgrader-wvzfz5ou/DistUpgrade/DistUpgradeController.py",
  line 25, in <module>
  import distro_info

  ModuleNotFoundError: No module named 'distro_info'

  With the version of the package from -proposed you'll receive no such
  traceback.

  [Regression Potential]
  We are just adding a new dependency so none.

  Original Description
  --------------------
  This a result of the SRU of the fix for bug 1799310 while the new dependency was added to the cosmic version of u-r-u that doesn't help because the dist-upgrader tarball doesn't reflect that dependency.

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