[Bug 1546130] [NEW] do-release-upgrade -d failed(from 14.04 to 16.04-testing)

[Ernillew]

Public bug reported:

Checking package manager
Reading package lists... Done    
Building dependency tree          
Reading state information... Done
Building data structures... Done 

Calculating the changes

Calculating the changes

Could not calculate 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 3.13.0-77.121-generic 3.13.11-ckt32
Uname: Linux 3.13.0-77-generic i686
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: i386
CrashDB: ubuntu
Date: Tue Feb 16 17:40:18 2016
InstallationDate: Installed on 2012-09-03 (1261 days ago)
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release i386 (20120424.1)
PackageArchitecture: all
ProcEnviron:
 TERM=screen
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-02-16 (0 days ago)

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


** Tags: apport-bug dist-upgrade i386 trusty

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https://bugs.launchpad.net/bugs/1546130

Title:
  do-release-upgrade -d failed(from 14.04 to 16.04-testing)

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

Bug description:
  Checking package manager
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done
  Building data structures... Done 

  Calculating the changes

  Calculating the changes

  Could not calculate 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 3.13.0-77.121-generic 3.13.11-ckt32
  Uname: Linux 3.13.0-77-generic i686
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: i386
  CrashDB: ubuntu
  Date: Tue Feb 16 17:40:18 2016
  InstallationDate: Installed on 2012-09-03 (1261 days ago)
  InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release i386 (20120424.1)
  PackageArchitecture: all
  ProcEnviron:
   TERM=screen
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-02-16 (0 days ago)

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