[Bug 1241660] Re: update-manager fails when upgrading from 13.04 to 13.10

[Brian Murray]

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

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: Confirmed => Triaged

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https://bugs.launchpad.net/bugs/1241660

Title:
  update-manager fails when upgrading from 13.04 to 13.10

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

Bug description:
  AMD64 upgrading from 13.04 to 13.10. In Terminal I type "update-manager -d", click on "Upgrade", authenticate my password, click on "Upgrade" again at the "Welcome to Ubuntu 13.10 'Saucy Salamander" window. A window pops up titled "Downloading Release Tool" and then disappears after file 2 message. Nothing happens.
  Here is the error message text that appears in the Terminal window:
  stephen at steve:~$ update-manager -d
  Checking for a new Ubuntu release
  authenticate 'saucy.tar.gz' against 'saucy.tar.gz.gpg' 
  extracting 'saucy.tar.gz'
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherCore.py", line 305, in run
      raise ex
  OSError: Can not execute '/tmp/ubuntu-release-upgrader-1_qswl/saucy'

  During handling of the above exception, another exception occurred:

  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 310, in run
      _("This usually is caused by a system where /tmp "
    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'

  Here is the version of update-manager:
  update-manager:
    Installed: 1:0.186.2
    Candidate: 1:0.186.2
    Version table:
   *** 1:0.186.2 0
          500 http://us.archive.ubuntu.com/ubuntu/ raring-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1:0.186 0
          500 http://us.archive.ubuntu.com/ubuntu/ raring/main amd64 Packages

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