package imagemagick-6-common 8:6.9.7.4+dfsg-16ubuntu6.8 failed to install/upgrade: end of file on stdin at conffile prompt

[John Pye]

This problem popped up automatically, I think something went wrong during a package upgrade.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: imagemagick-6-common 8:6.9.7.4+dfsg-16ubuntu6.8
ProcVersionSignature: Ubuntu 4.15.0-65.74-generic 4.15.18
Uname: Linux 4.15.0-65-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.9
AptOrdering:
 imagemagick-6-common:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
Date: Sat Nov 16 11:16:53 2019
Dependencies:

ErrorMessage: end of file on stdin at conffile prompt
InstallationDate: Installed on 2018-08-04 (468 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.8, python3-minimal, 3.6.7-1~18.04
PythonDetails: /usr/bin/python2.7, Python 2.7.15+, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2.3
 apt 1.6.12
SourcePackage: imagemagick
Title: package imagemagick-6-common 8:6.9.7.4+dfsg-16ubuntu6.8 failed to install/upgrade: end of file on stdin at conffile prompt
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.ImageMagick-6.policy.xml: 2019-09-02T17:01:59.226844