Public bug reported:
appstreamcli:3751): GLib-CRITICAL **: g_strchug: assertion 'string !=
NULL' failed
(appstreamcli:3751): GLib-CRITICAL **: g_strchomp: assertion 'string !=
NULL' failed
(appstreamcli:3751): GLib-CRITICAL **: g_strchug: assertion 'string !=
NULL' failed
(appstreamcli:3751): GLib-CRITICAL **: g_strchomp: assertion 'string !=
NULL' failed
(appstreamcli:3751): GLib-CRITICAL **: g_strchug: assertion 'string !=
NULL' failed
(appstreamcli:3751): GLib-CRITICAL **: g_strchomp: assertion 'string != NULL'
failed
AppStream cache update completed, but some metadata was ignored due to errors.
Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating the changes
Calculating the changes
Could not calculate the upgrade
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.25
ProcVersionSignature: Ubuntu 4.15.0-29.31~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Tue Jul 24 19:09:00 2018
InstallationDate: Installed on 2018-06-18 (35 days ago)
InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2018-07-24 (0 days ago)
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade xenial
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https://bugs.launchpad.net/bugs/1783372
Title:
upgrade from 16.04 to 18.04 not possible
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