[Bug 1827635] [NEW] dist-upgrader tarball needs updating to support upgrades from bionic to disco

[Brian Murray]

Public bug reported:

[Impact]
Users of Ubuntu 18.04 won't be able to upgrade to 19.04 when 18.10 reaches End of Life.

[Test Case]
1) modify ~/.cache/update-manager/meta-release so that Supported: 0 for Ubuntu 18.10
2) run do-release-upgrade
3) observe the following message

"Can not upgrade

An upgrade from 'bionic' to 'disco' is not supported with this tool."

With the version of the dist-upgrader from -proposed you'll be able to
upgrade from 18.04 to 19.04.

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: High
     Assignee: Brian Murray (brian-murray)
         Status: In Progress

** Affects: ubuntu-release-upgrader (Ubuntu Disco)
     Importance: High
     Assignee: Brian Murray (brian-murray)
         Status: In Progress

** Also affects: ubuntu-release-upgrader (Ubuntu Disco)
   Importance: Undecided
       Status: New

** Changed in: ubuntu-release-upgrader (Ubuntu)
     Assignee: (unassigned) => Brian Murray (brian-murray)

** Changed in: ubuntu-release-upgrader (Ubuntu)
   Importance: Undecided => High

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => In Progress

** Changed in: ubuntu-release-upgrader (Ubuntu Disco)
       Status: New => In Progress

** Changed in: ubuntu-release-upgrader (Ubuntu Disco)
   Importance: Undecided => High

** Changed in: ubuntu-release-upgrader (Ubuntu Disco)
     Assignee: (unassigned) => Brian Murray (brian-murray)

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https://bugs.launchpad.net/bugs/1827635

Title:
  dist-upgrader tarball needs updating to support upgrades from bionic
  to disco

Status in ubuntu-release-upgrader package in Ubuntu:
  In Progress
Status in ubuntu-release-upgrader source package in Disco:
  In Progress

Bug description:
  [Impact]
  Users of Ubuntu 18.04 won't be able to upgrade to 19.04 when 18.10 reaches End of Life.

  [Test Case]
  1) modify ~/.cache/update-manager/meta-release so that Supported: 0 for Ubuntu 18.10
  2) run do-release-upgrade
  3) observe the following message

  "Can not upgrade

  An upgrade from 'bionic' to 'disco' is not supported with this tool."

  With the version of the dist-upgrader from -proposed you'll be able to
  upgrade from 18.04 to 19.04.

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