[Bug 1725359] Re: release detection relies on lsb-release

[Julian Andres Klode]

I'm not sure how we'd achieve that. Figuring out which release is the
correct one is a much harder problem than figuring out that the release
we're being told is not the same as in sources.list.

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https://bugs.launchpad.net/bugs/1725359

Title:
  release detection relies on lsb-release

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

Bug description:
  ubuntu-release-upgrader uses lsb-release to determine the version of
  Ubuntu the system is running, however no double checking is done.  As
  we can see in bug 1725176, the user installed the version of lsb-
  release from Ubuntu 17.04 although they are running Ubuntu 16.10. The
  release-upgrader tries to upgrade them from zesty to artful but this
  fails as their /etc/apt/sources.list is full of yakkety entries and
  everything ends up being disabled.

  The release upgrader should likely confirm they either have their
  releases lsb-release installed or double check that their
  /etc/apt/sources.list matches the release lsb-release returns.

  I'll also use this as a tracking bug to find out how many people this
  is affecting.

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