Public bug reported:
Probably error in cache:
2020-08-18 13:59:05,049 DEBUG running doUpdate() (showErrors=False)
2020-08-18 13:59:15,107 ERROR IOError/SystemError in cache.update(): ''.
Retrying (currentRetry: 0)
2020-08-18 13:59:15,108 ERROR doUpdate() failed completely
2020-08-18 13:59:15,108 DEBUG openCache()
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38
ProcVersionSignature: Ubuntu 4.15.0-112.113-generic 4.15.18
Uname: Linux 4.15.0-112-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.16
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: GNOME
Date: Tue Aug 18 14:15:46 2020
DistributionChannelDescriptor:
# This is a distribution channel descriptor
# For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
canonical-oem-somerville-xenial-amd64-20160624-2
EcryptfsInUse: Yes
InstallationDate: Installed on 2018-11-27 (629 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary
20160624-10:47
PackageArchitecture: all
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=
LANG=fr_FR.UTF-8
SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-08-18 (0 days ago)
mtime.conffile..etc.update-manager.release-upgrades: 2020-08-18T09:56:03.859601
** 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/1892028
Title:
Impossible to upgrade to 20.04 lts from 18.04
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