[Bug 1811597] [NEW] update from 16.04 to 18.04 failed

[joaquin berenguer]

Public bug reported:

/usr/lib/python3/dist-packages/DistUpgrade/ReleaseNotesViewerWebkit.py:33: PyGIWarning: WebKit2 was imported without specifying a version first. Use gi.require_version('WebKit2', '4.0') before import to ensure that the right version gets loaded.
  from gi.repository import WebKit2 as WebKit
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
autenticar «bionic.tar.gz» contra «bionic.tar.gz.gpg» 
extrayendo «bionic.tar.gz»

(appstreamcli:19254): GLib-CRITICAL **: g_strchug: assertion 'string !=
NULL' failed

(appstreamcli:19254): GLib-CRITICAL **: g_strchomp: assertion 'string !=
NULL' failed

(appstreamcli:19254): GLib-CRITICAL **: g_strchug: assertion 'string !=
NULL' failed

(appstreamcli:19254): GLib-CRITICAL **: g_strchomp: assertion 'string !=
NULL' failed

(appstreamcli:19254): GLib-CRITICAL **: g_strchug: assertion 'string !=
NULL' failed

(appstreamcli:19254): GLib-CRITICAL **: g_strchomp: assertion 'string != NULL' failed
AppStream cache update completed, but some metadata was ignored due to errors.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.26
Uname: Linux 4.12.14-041214-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sun Jan 13 19:00:48 2019
InstallationDate: Installed on 2016-05-09 (979 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2019-01-13 (0 days ago)
VarLogDistupgradeTermlog:

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade third-party-packages xenial

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https://bugs.launchpad.net/bugs/1811597

Title:
  update from 16.04 to 18.04  failed

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  /usr/lib/python3/dist-packages/DistUpgrade/ReleaseNotesViewerWebkit.py:33: PyGIWarning: WebKit2 was imported without specifying a version first. Use gi.require_version('WebKit2', '4.0') before import to ensure that the right version gets loaded.
    from gi.repository import WebKit2 as WebKit
  Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
  autenticar «bionic.tar.gz» contra «bionic.tar.gz.gpg» 
  extrayendo «bionic.tar.gz»

  (appstreamcli:19254): GLib-CRITICAL **: g_strchug: assertion 'string
  != NULL' failed

  (appstreamcli:19254): GLib-CRITICAL **: g_strchomp: assertion 'string
  != NULL' failed

  (appstreamcli:19254): GLib-CRITICAL **: g_strchug: assertion 'string
  != NULL' failed

  (appstreamcli:19254): GLib-CRITICAL **: g_strchomp: assertion 'string
  != NULL' failed

  (appstreamcli:19254): GLib-CRITICAL **: g_strchug: assertion 'string
  != NULL' failed

  (appstreamcli:19254): GLib-CRITICAL **: g_strchomp: assertion 'string != NULL' failed
  AppStream cache update completed, but some metadata was ignored due to errors.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.26
  Uname: Linux 4.12.14-041214-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Sun Jan 13 19:00:48 2019
  InstallationDate: Installed on 2016-05-09 (979 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2019-01-13 (0 days ago)
  VarLogDistupgradeTermlog:

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