[Bug 1540017] Re: do-release-upgrade crashed with AttributeError in run(): 'apt_pkg.PackageManager' object has no attribute 'ResultFailed'

[Brian Murray]

*** This bug is a duplicate of bug 1292335 ***
    https://bugs.launchpad.net/bugs/1292335

** This bug has been marked a duplicate of bug 1292335
   do-release-upgrade crashed with AttributeError in run(): 'apt_pkg.PackageManager' object has no attribute 'ResultFailed'

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https://bugs.launchpad.net/bugs/1540017

Title:
  do-release-upgrade crashed with AttributeError in run():
  'apt_pkg.PackageManager' object has no attribute 'ResultFailed'

Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed

Bug description:
  I don't have anything - I'm just trying to install Ubuntu Mate  Alpha version of 16.04 and got errors - it tried to do a partial upgrade of something and this happened and I'm stuck with an unuseable system. It says dpkg: error processing package qemu (--configure): dependency problems - leaving unconfigured
  qemu-kvm depends on qemu-system-x86 (- 1:2.5dfsg-lubuntu4); however: Package qemu-system-x86 is not configured yet and threw me out of update and I'm going to power down and reinstall again without using software suggestions in the welcome menu. That was when I started getting wierd errors.  Installation was difficult and only allowed me to install with UEFI by partitioning myself and would not create a swap file until I tried 3 times to have it install fresh without manual partitioning so I guess this really a buggy version!

  ProblemType: Crash
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.4
  ProcVersionSignature: Ubuntu 4.3.0-7.18-generic 4.3.3
  Uname: Linux 4.3.0-7-generic x86_64
  ApportVersion: 2.19.4-0ubuntu2
  Architecture: amd64
  CrashDB: ubuntu
  Date: Sat Jan 30 18:57:07 2016
  ExecutablePath: /usr/bin/do-release-upgrade
  InstallationDate: Installed on 2016-01-30 (0 days ago)
  InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160127.1)
  InterpreterPath: /usr/bin/python3.5
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/lib/ubuntu-release-upgrader/do-partial-upgrade --frontend=DistUpgradeViewGtk3
  ProcEnviron:
   SHELL=/bin/bash
   LANG=en_US.UTF-8
   LANGUAGE=en_US
   PATH=(custom, no user)
  PythonArgs: ['/usr/bin/do-release-upgrade', '--frontend=DistUpgradeViewGtk3']
  SourcePackage: ubuntu-release-upgrader
  Title: do-release-upgrade crashed with AttributeError in run(): 'apt_pkg.PackageManager' object has no attribute 'ResultFailed'
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  VarLogDistupgradeTermlog:

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