[Bug 1776940] Re: upgrade fail from 16.04 to 18.04

[Brian Murray]

You've installed some packages from a PPA which are causing the upgrade
to fail.

libstdc++6 5.4.0-6ubuntu1~16.04.9 0
gcc-8-base 8-20180424-0ubuntu1~14.04 1

You'll want to remove these and whatever else the PPA provides using the
tool 'ppa-purge' from the package ppa-purge.  Thanks and good luck.

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1776940

Title:
  upgrade fail from 16.04 to 18.04

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

Bug description:
  After I removed all conflict packages like
   Hold prevents MarkGarbage of libc6-x32 [ amd64 ] < 2.23-0ubuntu10 > ( libs )
    Hold prevents MarkGarbage of liborbit-2-0 [ amd64 ] < 1:2.14.19-1build1 > ( libs )
  I still got upgrade fail message.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.4.0-128.154-generic 4.4.131
  Uname: Linux 4.4.0-128-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  Date: Fri Jun 15 00:46:54 2018
  InstallationDate: Installed on 2010-10-24 (2790 days ago)
  InstallationMedia: Ubuntu-Server 10.04 LTS "Lucid Lynx" - Release amd64 (20100427)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_US:en
   TERM=screen-bce
   PATH=(custom, no user)
   LANG=zh_TW.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-06-14 (0 days ago)

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