An unresolvable problem occurred while calculating the upgrade.

[Matthew Steven Porath]

Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade.

 If none of this applies, then please report this bug using the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.If you want to investigate this yourself the log files in '/var/log/dist-upgrade' will contain details about the upgrade. Specifically, look at 'main.log' and 'apt.log'.

oem1@oem1-ThinkPad-T430:~$ ubuntu-bug ubuntu-release-upgrader-core
Gtk-Message: 06:49:17.732: GtkDialog mapped without a transient parent. This is discouraged.
comm: /var/log/dmesg: No such file or directory
oem1@oem1-ThinkPad-T430:~$
(/usr/lib/firefox/firefox:13444): dconf-WARNING **: 06:53:48.085: Unable to open /var/lib/snapd/desktop/dconf/profile/user: Permission denied

oem1@oem1-ThinkPad-T430:~$ lsb_release -rd
Description: Ubuntu 18.04.2 LTS
Release: 18.04
oem1@oem1-ThinkPad-T430:~$ apt-cache policy pkgname
N: Unable to locate package pkgname
oem1@oem1-ThinkPad-T430:~$

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-terminal 3.28.2-1ubuntu1~18.04.1
ProcVersionSignature: Ubuntu 4.18.0-23.24~18.04.1-generic 4.18.20
Uname: Linux 4.18.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Jul 3 07:14:49 2019
ExecutablePath: /usr/lib/gnome-terminal/gnome-terminal-server
InstallationDate: Installed on 2019-06-09 (23 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
SourcePackage: gnome-terminal
UpgradeStatus: Upgraded to bionic on 2019-07-03 (0 days ago)