[Bug 1310851] Update Released

[Adam Conrad]

The verification of the Stable Release Update for ubuntu-release-
upgrader has completed successfully and the package has now been
released to -updates.  Subsequently, the Ubuntu Stable Release Updates
Team is being unsubscribed and will not receive messages about this bug
report.  In the event that you encounter a regression using the package
from -updates please report a new bug using ubuntu-bug and tag the bug
report regression-update so we can easily find any regresssions.

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https://bugs.launchpad.net/bugs/1310851

Title:
  Failed to fetch window does not appear

Status in “ubuntu-release-upgrader” package in Ubuntu:
  Fix Released
Status in “ubuntu-release-upgrader” source package in Saucy:
  Fix Released
Status in “ubuntu-release-upgrader” source package in Trusty:
  Fix Released

Bug description:
  [Test Case]
  1) run update-manager --no-update
  2) click to upgrade
  3) authenticate
  4) see release notification
  5) disable network
  6) click upgrade
  7) Observe traceback in terminal in which you ran update-manager --no-update

  Traceback (most recent call last):
    File "/usr/bin/do-release-upgrade", line 152, in <module>
      fetcher.run()
    File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherCore.py", line 278, in run
      _("Fetching the upgrade failed. There may be a network "
    File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcher.py", line 50, in error
      return error(self.window_main.window_main, summary, message)
  AttributeError: 'NoneType' object has no attribute 'window_main'

  With the version of the package from -proposed you should see a
  "Failed to fetch" error message.

  [Errors Bucket]
  https://errors.ubuntu.com/problem/6017779ce1d880665e7459bbb40c3e2ee76e6869

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