[Bug 1787540] Re: 16.04 to 18.04.1 ubgrade fails because of diversion of org.freedesktop.systemd1.service

[Brian Murray]

Could you please add the log files found in /var/log/dist-upgrade to
your bug report? Thanks in advance.

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

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https://bugs.launchpad.net/bugs/1787540

Title:
  16.04 to 18.04.1 ubgrade fails because of diversion of
  org.freedesktop.systemd1.service

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

Bug description:
  I ran do-release-upgrade from a terminal. The process eventually
  failed because of "too many errors". The root cause appears to be
  this:

  Removing systemd-shim (9-1bzr4ubuntu1) ...
  Removing 'diversion of /usr/share/dbus-1/system-services/org.freedesktop.systemd1.service to /usr/share/dbus-1/system-services/org.freedesktop.systemd1.service.systemd by systemd-shim'
  dpkg-divert: error: rename involves overwriting '/usr/share/dbus-1/system-services/org.freedesktop.systemd1.service' with
    different file '/usr/share/dbus-1/system-services/org.freedesktop.systemd1.service.systemd', not allowed

  I appear to have worked around this by manually removing
  /usr/share/dbus-1/system-services/org.freedesktop.systemd1.service,
  purging systemd-shim via `dpkg -P` and then doing `apt-get install
  -f`, which completed without errors.

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