unity-gnome-shell-migration.17.10.py crashed with signal 5

[CHiPs]

Encountered on first boot after upgrading from 16.04 to 18.04.

ProblemType: Crash
DistroRelease: Ubuntu 18.04
Package: ubuntu-session 3.28.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15
Uname: Linux 4.15.0-15-generic x86_64
ApportVersion: 2.20.9-0ubuntu4
Architecture: amd64
CurrentDesktop: GNOME-Greeter:GNOME
Date: Sat Apr 14 20:13:44 2018
ExecutablePath: /usr/share/session-migration/scripts/unity-gnome-shell-migration.17.10.py
InstallationDate: Installed on 2015-12-25 (841 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
InterpreterPath: /usr/bin/python3.6
ProcCmdline: /usr/bin/python3 /usr/share/session-migration/scripts/unity-gnome-shell-migration.17.10.py
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/false
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-2
PythonDetails: /usr/bin/python2.7, Python 2.7.14+, python-minimal, 2.7.14-4
Signal: 5
SourcePackage: gnome-session
StacktraceTop:
 () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_object_new_valist () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_object_new () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ffi_call_unix64 () at /usr/lib/x86_64-linux-gnu/libffi.so.6
Title: unity-gnome-shell-migration.17.10.py crashed with signal 5
UpgradeStatus: Upgraded to bionic on 2018-04-13 (0 days ago)
UserGroups:

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1754623, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.