[Bug 1772394] [NEW] crash of upgrade from Ubuntu 14 LTS to Ubuntu 16 LTS

[Anna]

Public bug reported:

At the second stage: setting new software channels the release upgrade
crashes and shows pop-up with information that the upgrade is
impossible.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.10
ProcVersionSignature: Ubuntu 3.13.0-147.196-generic 3.13.11-ckt39
Uname: Linux 3.13.0-147-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.28
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Mon May 21 12:43:15 2018
InstallationDate: Installed on 2014-12-03 (1264 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2018-05-21 (0 days ago)
VarLogDistupgradeTermlog:

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade third-party-packages trusty

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https://bugs.launchpad.net/bugs/1772394

Title:
  crash of upgrade from Ubuntu 14 LTS to Ubuntu 16 LTS

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

Bug description:
  At the second stage: setting new software channels the release upgrade
  crashes and shows pop-up with information that the upgrade is
  impossible.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.10
  ProcVersionSignature: Ubuntu 3.13.0-147.196-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-147-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.28
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Mon May 21 12:43:15 2018
  InstallationDate: Installed on 2014-12-03 (1264 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2018-05-21 (0 days ago)
  VarLogDistupgradeTermlog:

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