[Bug 1787862] Re: error "could not calculate the upgrade" while upgrading Kubuntu 17.10 to 18.04

[Launchpad Bug Tracker]

[Expired for ubuntu-release-upgrader (Ubuntu) because there has been no
activity for 60 days.]

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1787862

Title:
  error "could not calculate the upgrade" while upgrading Kubuntu 17.10
  to 18.04

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

Bug description:
  I uninstalled already ppa-backports with "ppa-purge" but still get the
  same error.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: ubuntu-release-upgrader-core 1:17.10.11
  ProcVersionSignature: Ubuntu 4.13.0-46.51-generic 4.13.16
  Uname: Linux 4.13.0-46-generic x86_64
  ApportVersion: 2.20.7-0ubuntu3.9
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Mon Aug 20 00:25:07 2018
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to artful on 2018-08-19 (0 days ago)
  VarLogDistupgradeTermlog:

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