[Bug 1854931] Re: tried to update from 16.04 to 18.4

[Brian Murray]

*** This bug is a duplicate of bug 1611737 ***
    https://bugs.launchpad.net/bugs/1611737

** This bug has been marked a duplicate of bug 1611737
   Can't upgrade from a release if ros packages are  installed from ROS servers

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https://bugs.launchpad.net/bugs/1854931

Title:
  tried to update from 16.04 to 18.4

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

Bug description:
  Tried to update from Ubuntu 16.04 to 18.04. Then an error regarding
  some PPA source came. So deleted the .list files in
  /etc/apt/sources.list.d.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.29
  ProcVersionSignature: Ubuntu 4.4.0-170.199-generic 4.4.200
  Uname: Linux 4.4.0-170-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.21
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Tue Dec  3 12:44:50 2019
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-xenial-amd64-20160624-2
  InstallationDate: Installed on 2019-05-22 (195 days ago)
  InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2019-12-03 (0 days ago)
  VarLogDistupgradeTermlog:

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