[Bug 1446552] Re: Unattended upgrades handles new dependencies inconsistently

[Launchpad Bug Tracker]

This bug was fixed in the package unattended-upgrades - 0.99ubuntu2

---------------
unattended-upgrades (0.99ubuntu2) bionic; urgency=medium

  * Run upgrade-between-snapshots only on amd64.
    The test exercises only unattented-upgrade's Python code and uses
    dependencies from the frozen Debian snapshot archive thus running
    it on all architectures would provide little benefit.

 -- Balint Reczey <rbalint at ubuntu.com>  Tue, 13 Feb 2018 11:41:20 +0700

** Changed in: unattended-upgrades (Ubuntu)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/1446552

Title:
  Unattended upgrades handles new dependencies inconsistently

Status in unattended-upgrades package in Ubuntu:
  Fix Released

Bug description:
  When an installed package adds a dependency that is not yet installed
  on the system, this sometimes causes the package to not be installed,
  depending on the origin containing the original candidate version.

  I believe that the problem is in /usr/bin/unattended-upgrade, line
  102. Here a check is performed to prevent downgrades. However, as a
  side effect it also prevents adjusting the candidate version for
  packages that have not yet been installed (because pkg.is_upgradable
  is False for packages that have not been installed).

  This makes updating private packages using unattended-upgrades
  troublesome, especially when new dependencies have been added.
  Currently it requires repackaging the dependencies with a slightly
  higher version number than what is in the main repository, and then
  hosting them on the private repository, which is time consuming and
  error-prone. With the included patch, it is sufficient to just host
  the same version on the private repository.

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