[Bug 1565553] Re: Attempting to upgrade from Release 12.04 to 14.04.4 LTS and crashes at calculating changes. Indicates I've install pre-release or non-official software. I have done neither.

[Brian Murray]

*** This bug is a duplicate of bug 1308338 ***
    https://bugs.launchpad.net/bugs/1308338

** This bug has been marked a duplicate of bug 1308338
   Ubuntu 12.04 LTS -> 14.04 LTS upgrade fails if Flight Gear installed

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https://bugs.launchpad.net/bugs/1565553

Title:
  Attempting to upgrade from Release 12.04 to 14.04.4 LTS and crashes at
  calculating changes. Indicates I've install  pre-release or non-
  official software. I have done neither.

Status in update-manager package in Ubuntu:
  New

Bug description:
  Nothing further

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.19
  ProcVersionSignature: Ubuntu 3.2.0-99.139-generic 3.2.76
  Uname: Linux 3.2.0-99-generic i686
  NonfreeKernelModules: wl
  ApportVersion: 2.0.1-0ubuntu17.13
  Architecture: i386
  Date: Sun Apr  3 17:01:15 2016
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2016-04-03 (0 days ago)
  VarLogDistupgradeTermlog:

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