[Bug 1727751] Re: ubuntu-distro-info shows the current development series as "latest development" and "supported stable version" at the same time

[Ubuntu Foundations Team Bug Bot]

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** Tags added: patch

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https://bugs.launchpad.net/bugs/1727751

Title:
  ubuntu-distro-info shows the current development series as "latest
  development" and "supported stable version" at the same time

Status in distro-info package in Ubuntu:
  New

Bug description:
  The current development series (cosmic as of today) should not be
  listed up as "supported stable versions".

  
  $ ubuntu-distro-info --date 2018-06-27 --devel -f
  Ubuntu 18.10 "Cosmic Cuttlefish"

  $ ubuntu-distro-info --date 2018-06-27 --supported -f
  Ubuntu 14.04 LTS "Trusty Tahr"
  Ubuntu 16.04 LTS "Xenial Xerus"
  Ubuntu 17.10 "Artful Aardvark"
  Ubuntu 18.04 LTS "Bionic Beaver"
  Ubuntu 18.10 "Cosmic Cuttlefish" <<< should not be here because it's a development series still

  
  $ apt policy distro-info
  distro-info:
    Installed: 0.18
    Candidate: 0.18
    Version table:
   *** 0.18 500
          500 http://jp.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
          100 /var/lib/dpkg/status

  $ date +%F
  2018-06-27

  $ grep cosmic /usr/share/distro-info/ubuntu.csv
  18.10,Cosmic Cuttlefish,cosmic,2018-04-26,2018-10-18,2019-07-18

  So the release date of "cosmic" is 2018-10-18 in distro-info-data, so
  cosmic as the current development series should not be listed with
  `ubuntu-distro-info --supported` because it's before the date as of
  today.

  $ ubuntu-distro-info -h
  ...
    -d  --devel            latest development version

        --supported        list of all supported stable versions
  ...

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