[Bug 1783619] [NEW] do-release-upgrade fails to calculate upgrade, crashes because appstreamcli crashes iin a g_str* assertion

[David A. Desrosiers]

Public bug reported:

Get:66 http://us.archive.ubuntu.com/ubuntu bionic-backports/universe amd64 DEP-11 Metadata [5,100 B]                                                                
Get:67 http://us.archive.ubuntu.com/ubuntu bionic-backports/universe DEP-11 64x64 Icons [1,789 B]                                                                   
Fetched 76.8 MB in 6s (1,564 kB/s)                                                                                                                                  

(appstreamcli:29485): GLib-CRITICAL **: g_strchug: assertion 'string !=
NULL' failed

(appstreamcli:29485): GLib-CRITICAL **: g_strchomp: assertion 'string !=
NULL' failed

(appstreamcli:29485): GLib-CRITICAL **: g_strchug: assertion 'string !=
NULL' failed

(appstreamcli:29485): GLib-CRITICAL **: g_strchomp: assertion 'string !=
NULL' failed

(appstreamcli:29485): GLib-CRITICAL **: g_strchug: assertion 'string !=
NULL' failed

(appstreamcli:29485): GLib-CRITICAL **: g_strchomp: assertion 'string !=
NULL' failed

(appstreamcli:29485): GLib-CRITICAL **: g_strchug: assertion 'string !=
NULL' failed

(appstreamcli:29485): GLib-CRITICAL **: g_strchomp: assertion 'string !=
NULL' failed

(appstreamcli:29485): GLib-CRITICAL **: g_strchug: assertion 'string !=
NULL' failed

(appstreamcli:29485): 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

An unresolvable problem occurred while calculating the upgrade.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.25
ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
Uname: Linux 4.4.0-45-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: XFCE
Date: Wed Jul 25 13:53:15 2018
InstallationDate: Installed on 2016-10-24 (638 days ago)
InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2018-07-25 (0 days ago)

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


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

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https://bugs.launchpad.net/bugs/1783619

Title:
  do-release-upgrade fails to calculate upgrade, crashes because
  appstreamcli crashes iin a g_str* assertion

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

Bug description:
  Get:66 http://us.archive.ubuntu.com/ubuntu bionic-backports/universe amd64 DEP-11 Metadata [5,100 B]                                                                
  Get:67 http://us.archive.ubuntu.com/ubuntu bionic-backports/universe DEP-11 64x64 Icons [1,789 B]                                                                   
  Fetched 76.8 MB in 6s (1,564 kB/s)                                                                                                                                  

  (appstreamcli:29485): GLib-CRITICAL **: g_strchug: assertion 'string
  != NULL' failed

  (appstreamcli:29485): GLib-CRITICAL **: g_strchomp: assertion 'string
  != NULL' failed

  (appstreamcli:29485): GLib-CRITICAL **: g_strchug: assertion 'string
  != NULL' failed

  (appstreamcli:29485): GLib-CRITICAL **: g_strchomp: assertion 'string
  != NULL' failed

  (appstreamcli:29485): GLib-CRITICAL **: g_strchug: assertion 'string
  != NULL' failed

  (appstreamcli:29485): GLib-CRITICAL **: g_strchomp: assertion 'string
  != NULL' failed

  (appstreamcli:29485): GLib-CRITICAL **: g_strchug: assertion 'string
  != NULL' failed

  (appstreamcli:29485): GLib-CRITICAL **: g_strchomp: assertion 'string
  != NULL' failed

  (appstreamcli:29485): GLib-CRITICAL **: g_strchug: assertion 'string
  != NULL' failed

  (appstreamcli:29485): 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

  An unresolvable problem occurred while calculating the upgrade.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
  Uname: Linux 4.4.0-45-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Wed Jul 25 13:53:15 2018
  InstallationDate: Installed on 2016-10-24 (638 days ago)
  InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-07-25 (0 days ago)

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