Crash to Lock Screen during Dist-Upgrade to 19.04

[Christian Noack]

How it happend:
* I installed updates with the software updater
* I started the dist upgrade from 18.10 > 19.04 after being asked by the updater to do so
* I received the message that the lock screen will be disabled during the upgrade
* During the upgrade, I was asked if I want to replace the customized configuration file /etc/services
* I did a screenshot of the dialog
* I selected the changes and pressed strg+c to copy the content
* The desktop immediately disappeared and the lock screen was shown
* The icons on the lock screen were missing
* When tried to log in, the lock screen disappeared and reappeared again after a short while
* Via Strg+Alt+F2 I was able to login without graphical user interface

It was possible to repair the installation via dpkg --configure -a

Side Note:
I am not sure if copyq was running when I copied the content.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: ubuntu-release-upgrader-core 1:19.04.16.1
ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
Uname: Linux 5.0.0-13-generic x86_64
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Tue Apr 23 12:14:05 2019
InstallationDate: Installed on 2018-03-29 (389 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: dist-upgrade
UpgradeStatus: Upgraded to disco on 2019-04-23 (0 days ago)
VarLogDistupgradeTermlog:

[Brian Murray (brian-murray)]

I tried to recreate this but was unable to, likely because I was not running in a wayland session.