Public bug reported:
It seems from /var/log/dist-upgrade/main.log that the problem might be
related to Python 2.7.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.37
ProcVersionSignature: Ubuntu 5.3.0-47.39~18.04.1-generic 5.3.18
Uname: Linux 5.3.0-47-generic x86_64
NonfreeKernelModules: wireguard
ApportVersion: 2.20.9-0ubuntu7.14
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity:Unity7:ubuntu
Date: Fri Apr 24 16:50:18 2020
InstallationDate: Installed on 2016-05-02 (1453 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-04-24 (0 days ago)
VarLogDistupgradeTermlog:
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic dist-upgrade third-party-packages
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https://bugs.launchpad.net/bugs/1874720
Title:
Upgrade from 18.04 to 20.04 stalls
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