[Bug 1768905] Re: package menu 2.1.47ubuntu2 failed to install/upgrade: dependency problems - leaving triggers unprocessed

[Julian Andres Klode]

I have not heard about any regressions in proposed, so I think we should
start releasing the update for bionic and artful now and watch out for
those in the release pocket. If we don't see issues with that, we can
then roll out xenial next week to give it some more time to mature in a
less used release.

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Title:
  package menu 2.1.47ubuntu2 failed to install/upgrade: dependency
  problems - leaving triggers unprocessed

Status in apt package in Ubuntu:
  Incomplete
Status in menu package in Ubuntu:
  Fix Released
Status in apt source package in Xenial:
  Confirmed
Status in menu source package in Xenial:
  Fix Committed
Status in apt source package in Artful:
  Confirmed
Status in menu source package in Artful:
  Fix Committed
Status in apt source package in Bionic:
  Confirmed
Status in menu source package in Bionic:
  Fix Committed
Status in menu package in Debian:
  New

Bug description:
  [Impact]
  Breaks some upgrades, depending on install order.

  [Test case]
  N/A. After consultation with the dpkg maintainer and investigating the situation, it's reasonably safe to assume that noawait is the right thing to do:

  * the intended use for the trigger is to run _after_ packages with .menu 
  files are configured, not before; therefore
  * the file trigger is triggered manually from the postinst again, discussion has been that the file trigger is not actually needed.

  [Regression potential]
  Menu might not be updated correctly

  [Original bug report]
  I get this error when I update to 18.04

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: menu 2.1.47ubuntu2
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  Date: Thu May  3 16:51:28 2018
  Dependencies:
   gcc-8-base 8-20180414-1ubuntu2
   libc6 2.27-3ubuntu1
   libgcc1 1:8-20180414-1ubuntu2
   libstdc++6 8-20180414-1ubuntu2
  ErrorMessage: dependency problems - leaving triggers unprocessed
  InstallationDate: Installed on 2018-04-11 (22 days ago)
  InstallationMedia: Ubuntu-MATE 17.10 "Artful Aardvark" - Release amd64 (20180106)
  Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
  PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu2
   apt  1.6.1
  SourcePackage: menu
  Title: package menu 2.1.47ubuntu2 failed to install/upgrade: dependency problems - leaving triggers unprocessed
  UpgradeStatus: Upgraded to bionic on 2018-05-03 (0 days ago)

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