[Bug 1731334] Re: update-notifier-common upgrade :debconf.py not found

[Jeremy Bicha]

This error can also be seen in update-notifier's autopkgtest triggered
by debconf 1.5.64

http://autopkgtest.ubuntu.com/packages/u/update-notifier/bionic/amd64

** Also affects: debconf (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: debconf (Ubuntu)
       Status: New => Confirmed

** Changed in: debconf (Ubuntu)
   Importance: Undecided => High

** Changed in: update-notifier (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1731334

Title:
  update-notifier-common upgrade :debconf.py not found

Status in debconf package in Ubuntu:
  Confirmed
Status in update-notifier package in Ubuntu:
  Confirmed

Bug description:
  Today I did a fresh instalation of new branch development ubuntu
  beaver, intended to help with some tests... So, after the
  installation, I switched on cannonical partners and proposed
  repositoryes and I gave an apt upgrade and dist-upgrade and restarted
  the computer...  After this I tried to install flashplugin-installer
  and I got the follow messages from apt process:

  Configuring update-notifier-common (3.186) ...
  Traceback (most recent call last):
    File "/usr/lib/update-notifier/package-data-downloader", line 26, in <module>
      import debconf
  ModuleNotFoundError: No module named 'debconf'
  dpkg: erro ao processar o pacote update-notifier-common (--configure):
   installed update-notifier-common package post-installation script subprocess returned error exit status 1

  I had to remove the update-notifier-common and with it, update-
  notifier, ubuntu-desktop, the unconfigured flashplugin-installer and
  some two oher dependencies that I dont remember.

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