package lxd 3.0.3-0ubuntu1~18.04.1 failed to install/upgrade: new lxd package pre-installation script subprocess was killed by signal (Aborted)

[Greg Devine]

I was performing a release upgrade from 18.04 to 20.04 and if failed about 90% of the way due to a inconsistency in the apt database. It did upgrade though. my sytem now shows:
lsb_release output...

Distributor ID: Ubuntu
Description: Ubuntu 20.04.2 LTS
Release: 20.04
Codename: focal

If you have more questions or suggestions

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: lxd 3.0.3-0ubuntu1~18.04.1
ProcVersionSignature: Ubuntu 5.4.0-65.73-generic 5.4.78
Uname: Linux 5.4.0-65-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
Date: Mon Feb 15 03:50:56 2021
ErrorMessage: new lxd package pre-installation script subprocess was killed by signal (Aborted)
InstallationDate: Installed on 2021-02-15 (0 days ago)
InstallationMedia: Ubuntu-Server 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1)
Python3Details: /usr/bin/python3.8, Python 3.8.5, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.4
SourcePackage: lxd
Title: package lxd 3.0.3-0ubuntu1~18.04.1 failed to install/upgrade: new lxd package pre-installation script subprocess was killed by signal (Aborted)
UpgradeStatus: Upgraded to focal on 2021-02-15 (0 days ago)

[Stéphane Graber (stgraber)]

That's pretty confusing, it shows as if it crashed while trying to test connectivity with the snap store but this appears to be outside of our script and is weirdly mixed in with gnome session output.

Did you manage to fully unstick that system and apply all remaining updates afterwards?

[Launchpad Janitor (janitor)]

[Expired for lxd (Ubuntu) because there has been no activity for 60 days.]