I can reliably reproduce the crash when attempting the bionic→cosmic upgrade in a VM.
** Description changed: The Ubuntu Error Tracker has been receiving reports about a problem regarding appstream. This problem was most recently seen with package version 0.12.2-2, the problem page at https://errors.ubuntu.com/problem/fca706c9b229ddb2bae3fa59877eee4f98f69366 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports. If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/. + + This crash happens when trying to upgrade a fully up-to-date bionic + machine to cosmic. appstreamcli crashes with the following error, thus + aborting the upgrade process: + + E:Problem executing scripts APT::Update::Post-Invoke-Success 'if + /usr/bin/test -w /var/cache/app-info -a -e /usr/bin/appstreamcli; then + appstreamcli refresh-cache > /dev/null; fi', E:Sub-process retrened an + error code -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to appstream in Ubuntu. https://bugs.launchpad.net/bugs/1792537 Title: /usr/bin/appstreamcli:5:g_variant_new_parsed_va:g_variant_builder_add_parsed:as_content_rating_to_variant:as_component_to_variant:as_cache_file_save To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/appstream/+bug/1792537/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs