unity8 crashed with SIGSEGV in begin()

[Walter Garcia-Fontes]

I got this crash after trying the Unity 8 session and loggin out.

ProblemType: Crash
DistroRelease: Ubuntu 16.10
Package: unity8 8.14+16.10.20160922-0ubuntu2
ProcVersionSignature: Ubuntu 4.8.0-17.19-generic 4.8.0-rc7
Uname: Linux 4.8.0-17-generic x86_64
ApportVersion: 2.20.3-0ubuntu7
Architecture: amd64
Date: Wed Oct 5 16:02:06 2016
ExecutablePath: /usr/bin/unity8
InstallationDate: Installed on 2015-10-17 (353 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
ProcCmdline: unity8 --mode=full-shell
Signal: 11
SourcePackage: unity8
StacktraceTop:
 qtmir::ApplicationManager::findApplicationWithPid(int) const () from /usr/lib/x86_64-linux-gnu/qt5/qml/Unity/Application/libunityapplicationplugin.so
 qtmir::SessionManager::onSessionStarting(std::shared_ptr<mir::scene::Session> const&) () from /usr/lib/x86_64-linux-gnu/qt5/qml/Unity/Application/libunityapplicationplugin.so
 QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
 QCoreApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
 QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
Title: unity8 crashed with SIGSEGV in qtmir::ApplicationManager::findApplicationWithPid()
UpgradeStatus: Upgraded to yakkety on 2016-09-01 (34 days ago)
UserGroups: adm cdrom dip lpadmin mail plugdev sambashare sudo vboxusers

[Apport retracing service (apport)]

StacktraceTop:
 begin (this=0x55b8da77ac98) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qlist.h:110
 begin (this=0x55b8da77ac98) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qlist.h:313
 qtmir::ApplicationManager::findApplicationWithPid (this=0x55b8da77ac80, pid=4145) at ./src/modules/Unity/Application/application_manager.cpp:622
 qtmir::ApplicationManager::findApplicationWithSession (this=<optimized out>, session=<optimized out>) at ./src/modules/Unity/Application/application_manager.cpp:614
 qtmir::ApplicationManager::findApplicationWithSession (this=<optimized out>, session=...) at ./src/modules/Unity/Application/application_manager.cpp:607

[Launchpad Janitor (janitor)]

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