package man-db 2.7.6.1-2 failed to install/upgrade: triggers looping, abandoned

[Jorge González]

i did an update to ubuntu mate 17.10 and man-db 2.7.6.1-2 failed to upgrade

ProblemType: Package
DistroRelease: Ubuntu 17.10
Package: man-db 2.7.6.1-2
ProcVersionSignature: Ubuntu 4.13.0-39.44-generic 4.13.16
Uname: Linux 4.13.0-39-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.7-0ubuntu3.8
Architecture: amd64
Date: Sat Apr 28 02:59:30 2018
ErrorMessage: triggers looping, abandoned
InstallationDate: Installed on 2017-12-04 (146 days ago)
InstallationMedia: Ubuntu-MATE 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
Python3Details: /usr/bin/python3.6, Python 3.6.3, python3-minimal, 3.6.3-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.14, python-minimal, 2.7.14-2ubuntu1
RelatedPackageVersions:
 dpkg 1.18.24ubuntu1
 apt 1.5.1
SourcePackage: man-db
Title: package man-db 2.7.6.1-2 failed to install/upgrade: triggers looping, abandoned
UpgradeStatus: Upgraded to artful on 2018-04-29 (1 days ago)

[Colin Watson (cjwatson)]

dpkg: cycle found while processing triggers:
 chain of packages whose triggers are or may be responsible:
  man-db -> desktop-file-utils
 packages' pending triggers which are or may be unresolvable:
  man-db: /usr/share/man
  desktop-file-utils: /usr/share/applications
  gconf2: /usr/share/GConf/gsettings
  ufw: /etc/ufw/applications.d

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