[Bug 1511783] Re: release upgrader can create a too minimal sources.list

[Brian Murray]

Given that this entry appears in the sources.list file when it is being
examined, it must have been added fairly early.

2015-10-30 09:18:14,157 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu vivid main'
2015-10-30 09:18:14,158 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu wily main' updated to new dist
2015-10-30 09:18:14,158 DEBUG examining: 'deb-src http://mirror.mcs.anl.gov/ubuntu vivid-security main restricted universe multiverse'

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https://bugs.launchpad.net/bugs/1511783

Title:
  release upgrader can create a too minimal sources.list

Status in ubuntu-release-upgrader package in Ubuntu:
  Triaged

Bug description:
  In the event that the mirror in your /etc/apt/sources.list file is no
  longer an official mirror of Ubuntu, the release upgrade process will
  create a new sources.list file for you with only main enabled for the
  release to which you are upgrading. This will create a poor upgrade
  experience. This will need to be fixed before or with the fix for bug
  1463680.

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