[Bug 1594488] [NEW] failed to upgrade

[lesshypocrisy]

Public bug reported:

Message "Could not determine the upgrade
An unresolvable problem occurred while calculating the upgrade. This can be caused by ... If none of this applies please report this bug using the command ..."

This is utterly unhelpful as it provides no diagnostics i.e. at what
point did it fail ; what conflict(s) ; which packages ; at what line in
the upgrade code ; why are there no log messages etc.

Am I now forced to do a fresh install ?? !!

Thanks Shak

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: ubuntu-release-upgrader-core 1:15.10.14.4
ProcVersionSignature: Ubuntu 4.2.0-38.45-generic 4.2.8-ckt10
Uname: Linux 4.2.0-38-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: KDE
Date: Mon Jun 20 18:31:40 2016
InstallationDate: Installed on 2015-10-17 (247 days ago)
InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150924)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to wily on 2016-06-20 (0 days ago)
VarLogDistupgradeTermlog:

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


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

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https://bugs.launchpad.net/bugs/1594488

Title:
  failed to upgrade

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

Bug description:
  Message "Could not determine the upgrade
  An unresolvable problem occurred while calculating the upgrade. This can be caused by ... If none of this applies please report this bug using the command ..."

  This is utterly unhelpful as it provides no diagnostics i.e. at what
  point did it fail ; what conflict(s) ; which packages ; at what line
  in the upgrade code ; why are there no log messages etc.

  Am I now forced to do a fresh install ?? !!

  Thanks Shak

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: ubuntu-release-upgrader-core 1:15.10.14.4
  ProcVersionSignature: Ubuntu 4.2.0-38.45-generic 4.2.8-ckt10
  Uname: Linux 4.2.0-38-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Mon Jun 20 18:31:40 2016
  InstallationDate: Installed on 2015-10-17 (247 days ago)
  InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150924)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to wily on 2016-06-20 (0 days ago)
  VarLogDistupgradeTermlog:

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