Comment 0 for bug 1756862

Test Case:
1. Install 17.01 and apply all updates
2. boot the ISO of Ubuntu Desktop 18.04
3. Launch the install and in the partitioning step, select Upgrade from 17.10 to 18.04
4. Proceed with the rest of the installation

Expected result
The system upgrades successfully to 18.04

Actual result
This crash

ProblemType: Crash
DistroRelease: Ubuntu 18.04
Package: apt-clone 0.4.1ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
Uname: Linux 4.15.0-12-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CasperVersion: 1.389
Date: Mon Mar 19 12:59:14 2018
ExecutablePath: /usr/bin/apt-clone
InterpreterPath: /usr/bin/python3.6
LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180317)
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/apt-clone restore-new-distro /target/ubiquity-apt-clone/apt-clone-state-hostname.tar.gz bionic --destination /target
Python3Details: /usr/bin/python3.6, Python 3.6.5rc1, python3-minimal, 3.6.4-1
PythonArgs: ['/usr/bin/apt-clone', 'restore-new-distro', '/target/ubiquity-apt-clone/apt-clone-state-hostname.tar.gz', 'bionic', '--destination', '/target']
PythonDetails: /usr/bin/python2.7, Python 2.7.14+, python-minimal, 2.7.14-4
SourcePackage: apt-clone
Title: apt-clone crashed with SystemError in commit(): installArchives() failed
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: