[Bug 1611469] [NEW] do-release-upgrade from 14.04.5 to 16.04.1 fails

[Martin John]

Public bug reported:

Welcome to Ubuntu 14.04.5 LTS (GNU/Linux 3.13.0-93-generic x86_64)

 * Documentation:  https://help.ubuntu.com/

  System information as of Tue Aug  9 19:04:33 BST 2016

  System load:  0.21               Processes:           109
  Usage of /:   19.9% of 14.38GB   Users logged in:     0
  Memory usage: 52%                IP address for eth0: 192.168.10.117
  Swap usage:   1%

  Graph this data and manage this system at:
    https://landscape.canonical.com/

0 packages can be updated.
0 updates are security updates.

New release '16.04.1 LTS' available.
Run 'do-release-upgrade' to upgrade to it.

No mail.
Last login: Tue Aug  9 19:04:35 2016 from lxc.home
root at backuppc:~# do-release-upgrade

...

Reading state information... Done
Building data structures... Done

Calculating the changes

Calculating the changes

Could not determine the upgrade

An unresolvable problem occurred while calculating the upgrade.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-93.140-generic 3.13.11-ckt39
Uname: Linux 3.13.0-93-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
CrashDB: ubuntu
Date: Tue Aug  9 19:08:38 2016
InstallationDate: Installed on 2014-07-05 (766 days ago)
InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-08-09 (0 days ago)

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


** Tags: amd64 apport-bug dist-upgrade trusty

** Attachment added: "output from "ubuntu-bug ubuntu-release-upgrader-core""
   https://bugs.launchpad.net/bugs/1611469/+attachment/4717708/+files/apport.ubuntu-release-upgrader-core.nt5t7cd2.apport

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https://bugs.launchpad.net/bugs/1611469

Title:
  do-release-upgrade from 14.04.5 to 16.04.1 fails

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

Bug description:
  Welcome to Ubuntu 14.04.5 LTS (GNU/Linux 3.13.0-93-generic x86_64)

   * Documentation:  https://help.ubuntu.com/

    System information as of Tue Aug  9 19:04:33 BST 2016

    System load:  0.21               Processes:           109
    Usage of /:   19.9% of 14.38GB   Users logged in:     0
    Memory usage: 52%                IP address for eth0: 192.168.10.117
    Swap usage:   1%

    Graph this data and manage this system at:
      https://landscape.canonical.com/

  0 packages can be updated.
  0 updates are security updates.

  New release '16.04.1 LTS' available.
  Run 'do-release-upgrade' to upgrade to it.

  No mail.
  Last login: Tue Aug  9 19:04:35 2016 from lxc.home
  root at backuppc:~# do-release-upgrade

  ...

  Reading state information... Done
  Building data structures... Done

  Calculating the changes

  Calculating the changes

  Could not determine the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-93.140-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-93-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CrashDB: ubuntu
  Date: Tue Aug  9 19:08:38 2016
  InstallationDate: Installed on 2014-07-05 (766 days ago)
  InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-08-09 (0 days ago)

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