package emacs25 25.2+1-6 failed to install/upgrade: installed emacs25 package post-installation script subprocess returned error exit status 1

[Fabrice Neyret]

just installing emacs from synaptic.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: emacs25 25.2+1-6
ProcVersionSignature: Ubuntu 4.15.0-50.54-generic 4.15.18
Uname: Linux 4.15.0-50-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
Date: Wed May 22 09:34:23 2019
ErrorMessage: installed emacs25 package post-installation script subprocess returned error exit status 1
Python3Details: /usr/bin/python3.6, Python 3.6.7, python3-minimal, 3.6.7-1~18.04
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2.1
 apt 1.6.10
SourcePackage: emacs25
Title: package emacs25 25.2+1-6 failed to install/upgrade: installed emacs25 package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)