[Bug 911082] [NEW] meta-release can be corrupted on network error

[fuscata]

Public bug reported:

I had trouble upgrading my laptop from 11.04 to 11.10:

# do-release-upgrade 
Checking for a new ubuntu release
No new release found

I checked /var/lib/update-manager/meta-release only to find the HTML
source of a wi-fi paywall splash page.

The process that fetches this file should check that it's valid before
downloading.

Related: https://bugs.launchpad.net/ubuntu/+source/update-
manager/+bug/521765

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: distribution-upgrade

** Tags added: distribution-upgrade

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https://bugs.launchpad.net/bugs/911082

Title:
  meta-release can be corrupted on network error

Status in “update-manager” package in Ubuntu:
  New

Bug description:
  I had trouble upgrading my laptop from 11.04 to 11.10:

  # do-release-upgrade 
  Checking for a new ubuntu release
  No new release found

  I checked /var/lib/update-manager/meta-release only to find the HTML
  source of a wi-fi paywall splash page.

  The process that fetches this file should check that it's valid before
  downloading.

  Related: https://bugs.launchpad.net/ubuntu/+source/update-
  manager/+bug/521765

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