[Bug 1827975] Re: package man-db 2.7.5-1 failed to install/upgrade: triggers looping, abandoned

[Colin Watson]

dpkg: cycle found while processing triggers:
 chain of packages whose triggers are or may be responsible:
  man-db -> menu
 packages' pending triggers which are or may be unresolvable:
  man-db: /usr/share/man
  systemd: /etc/init.d
  doc-base: /usr/share/doc-base
  menu: /usr/share/menu

There's no real cycle here (while menu installs manual pages, man-db for
its part doesn't install anything that would cause menu to be
triggered), so I think this must be a dpkg bug.

** Package changed: man-db (Ubuntu) => dpkg (Ubuntu)

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Title:
  package man-db 2.7.5-1 failed to install/upgrade: triggers looping,
  abandoned

Status in dpkg package in Ubuntu:
  New

Bug description:
  Get a error pop up upon restarting machine.

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: man-db 2.7.5-1
  ProcVersionSignature: Ubuntu 4.4.0-146.172-generic 4.4.177
  Uname: Linux 4.4.0-146-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  Date: Tue May  7 10:42:31 2019
  ErrorMessage: triggers looping, abandoned
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.5
   apt  1.2.31
  SourcePackage: man-db
  Title: package man-db 2.7.5-1 failed to install/upgrade: triggers looping, abandoned
  UpgradeStatus: Upgraded to xenial on 2019-05-07 (0 days ago)

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