package ebtables 2.0.10.4+snapshot20181205-1ubuntu1 failed to install/upgrade: installed ebtables package post-installation script subprocess returned error exit status 2

[Benjamin Drung]

When upgrading from Ubuntu 18.10 to 19.04, the package ebtables fails to install. The alternatives

/etc/alternatives/ebtables
/etc/alternatives/ebtables-restore
/etc/alternatives/ebtables-save

where empty files instead of symlinks. I removed those files and then the installation succeeded.

ProblemType: Package
DistroRelease: Ubuntu 19.04
Package: ebtables 2.0.10.4+snapshot20181205-1ubuntu1
ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
Uname: Linux 5.0.0-13-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
Date: Fri Apr 19 23:35:04 2019
DuplicateSignature:
 package:ebtables:2.0.10.4+snapshot20181205-1ubuntu1
 Installing new version of config file /etc/ethertypes ...
 update-alternatives: error: cannot stat file '/etc/alternatives/ebtables': Invalid argument
 dpkg: error processing package ebtables (--configure):
  installed ebtables package post-installation script subprocess returned error exit status 2
ErrorMessage: installed ebtables package post-installation script subprocess returned error exit status 2
Python3Details: /usr/bin/python3.7, Python 3.7.3, python3-minimal, 3.7.3-1
PythonDetails: /usr/bin/python2.7, Python 2.7.16, python-minimal, 2.7.16-1
RelatedPackageVersions:
 dpkg 1.19.6ubuntu1
 apt 1.8.0
SourcePackage: ebtables
Title: package ebtables 2.0.10.4+snapshot20181205-1ubuntu1 failed to install/upgrade: installed ebtables package post-installation script subprocess returned error exit status 2
UpgradeStatus: Upgraded to disco on 2019-04-19 (0 days ago)