[Bug 1783958] Re: cannot upgrade from 16 to 18

[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/1783958

Title:
  cannot upgrade from 16 to 18

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

Bug description:
  I tried to upgrade my ubuntu 16 to 18 but failed.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25 [origin: unknown]
  ProcVersionSignature: Ubuntu 4.4.0-131.157-generic 4.4.134
  Uname: Linux 4.4.0-131-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: MATE
  Date: Thu Jul 26 21:31:30 2018
  InstallationDate: Installed on 2016-03-21 (857 days ago)
  InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160127.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-07-27 (0 days ago)
  VarLogDistupgradeTermlog:

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