PyQt5 crashes when a signal from a base class is emitted

[Maxime Lemonnier]

this is exactly what happened to me:

http://python.6.x6.nabble.com/Signal-causes-seg-fault-td5207129.html

It is quite major!

It means you can't create a binding with the property of a base class.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: python-pyqt5 5.5.1+dfsg-3ubuntu4
ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13
Uname: Linux 4.13.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Mar 14 16:10:18 2018
InstallationDate: Installed on 2018-02-01 (41 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
SourcePackage: pyqt5
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Dmitry Shachnev (mitya57)]

This should be fixed in Ubuntu 18.04 LTS, can you please check?

Unfortunately upstream does not have a proper VCS so it may be difficult to identify a particular patch that fixes this bug.