Public bug reported: Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade. This can be caused by: * Upgrading to a pre-release version of Ubuntu * Running the current pre-release version of Ubuntu * Unofficial software packages not provided by Ubuntu If none of this applies, then please report this bug using the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. ishwor@ishwor-Latitude-3440:~$ sudo apt update sudo: unable to resolve host ishwor-Latitude-3440 [sudo] password for ishwor: Hit:1 http://np.archive.ubuntu.com/ubuntu xenial InRelease Hit:2 http://ubuntu.ntc.net.np/ubuntu xenial InRelease AppStream cache update completed, but some metadata was ignored due to errors. Reading package lists... Done Building dependency tree Reading state information... Done 2 packages can be upgraded. Run 'apt list --upgradable' to see them. ishwor@ishwor-Latitude-3440:~$ sudo do-release-upgrade -d sudo: unable to resolve host ishwor-Latitude-3440 Checking for a new Ubuntu release Get:1 Upgrade tool signature [819 B] Get:2 Upgrade tool [1,257 kB] Fetched 1,258 kB in 0s (0 B/s) authenticate 'bionic.tar.gz' against 'bionic.tar.gz.gpg' extracting 'bionic.tar.gz' Reading cache Checking package manager Reading package lists... Done Building dependency tree Reading state information... Done Hit http://ubuntu.ntc.net.np/ubuntu xenial InRelease Hit http://np.archive.ubuntu.com/ubuntu xenial InRelease Fetched 0 B in 0s (0 B/s) Reading package lists... Done Building dependency tree Reading state information... Done Updating repository information Get:1 http://ubuntu.ntc.net.np/ubuntu bionic InRelease [242 kB] Get:2 http://np.archive.ubuntu.com/ubuntu bionic InRelease [242 kB] Get:3 http://ubuntu.ntc.net.np/ubuntu bionic/main amd64 Packages [1,019 kB] Get:4 http://np.archive.ubuntu.com/ubuntu bionic/main amd64 Packages [1,019 kB] Get:5 http://ubuntu.ntc.net.np/ubuntu bionic/main i386 Packages [1,007 kB] Get:6 http://np.archive.ubuntu.com/ubuntu bionic/main i386 Packages [1,007 kB] Get:7 http://ubuntu.ntc.net.np/ubuntu bionic/main Translation-en [516 kB] Get:8 http://ubuntu.ntc.net.np/ubuntu bionic/main amd64 DEP-11 Metadata [477 kB] Get:9 http://np.archive.ubuntu.com/ubuntu bionic/main Translation-en [516 kB] Get:10 http://ubuntu.ntc.net.np/ubuntu bionic/main DEP-11 64x64 Icons [245 kB] Get:11 http://np.archive.ubuntu.com/ubuntu bionic/main amd64 DEP-11 Metadata [477 kB] Get:12 http://np.archive.ubuntu.com/ubuntu bionic/main DEP-11 64x64 Icons [245 kB] Fetched 7,012 kB in 0s (0 B/s) (appstreamcli:7223): GLib-CRITICAL **: g_strchug: assertion 'string != NULL' failed (appstreamcli:7223): GLib-CRITICAL **: g_strchomp: assertion 'string != NULL' failed (appstreamcli:7223): GLib-CRITICAL **: g_strchug: assertion 'string != NULL' failed (appstreamcli:7223): 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. This can be caused by: * Upgrading to a pre-release version of Ubuntu * Running the current pre-release version of Ubuntu * Unofficial software packages not provided by Ubuntu If none of this applies, then please report this bug using the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. Restoring original system state Aborting Reading package lists... Done Building dependency tree Reading state information... Done ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: ubuntu-release-upgrader-core 1:16.04.12 ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6 Uname: Linux 4.4.0-21-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: Unity Date: Fri Apr 27 19:43:55 2018 InstallationDate: Installed on 2016-05-11 (716 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader UpgradeStatus: Upgraded to xenial on 2018-04-27 (0 days ago) VarLogDistupgradeTermlog: ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug dist-upgrade third-party-packages xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1767382 Title: upgrading from 16 to 18 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1767382/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
