[Bug 1862305] Re: distro-info in xenial backports needs a newer distro-info-data and versioned dependency

[Stefano Rivera]

** Also affects: xenial-backports
   Importance: Undecided
       Status: New

** Changed in: distro-info (Ubuntu)
       Status: New => Invalid

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Title:
  distro-info in xenial backports needs a newer distro-info-data and
  versioned dependency

Status in Xenial Backports:
  New
Status in distro-info package in Ubuntu:
  Invalid

Bug description:
  Hi,
  askubuntu [1] made me aware of this issue.

  What I see is:
  root at x:~# apt-cache policy distro-info distro-info-data
  distro-info:
    Installed: (none)
    Candidate: 0.14ubuntu0.1
    Version table:
       0.18~ubuntu16.04.1 100
          100 http://archive.ubuntu.com/ubuntu xenial-backports/main amd64 Packages
       0.14ubuntu0.1 500
          500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
       0.14build1 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
  distro-info-data:
    Installed: 0.28ubuntu0.13
    Candidate: 0.28ubuntu0.13
    Version table:
   *** 0.28ubuntu0.13 500
          500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
          500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
          100 /var/lib/dpkg/status
       0.28 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages

  The distro-info in backports is this atm:
  https://launchpad.net/ubuntu/+source/distro-info/0.18~ubuntu16.04.1

  The problem is that this is non-functional with the `distro-info-data`
  in Xenial.

  $ apt install distro-info=0.18~ubuntu16.04.1
  $ distro-info --lts
  ubuntu-distro-info: Header `version,codename,series,created,release,eol,eol-server,eol-esm' in file `/usr/share/distro-info/ubuntu.csv' does not match excatly `version,codename,series,created,release,eol,eol-server'.

  For distro-info=0.18~ubuntu16.04.1 to work there should:
  - also be a distro-info-data in backports
  - the distro-info=0.18~ubuntu16.04.1 probably needs a versioned dependency on the newer distro-info

  [1]: https://askubuntu.com/questions/1208133/virtual-machine-with-
  uvitools-problem

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