Created attachment 171155 [details]
Backtrace

First of all, I didn't experience this bug myself, I just saw it on someone elses computer and debugged it somewhat.

SUMMARY
Plasmashell crashes

The backtrace is the same as this sentry report: https://crash-reports.kde.org/organizations/kde/issues/38215/?project=9&query=is%3Aunresolved&referrer=issue-stream&statsPeriod=90d&stream_index=9

The backtrace is attached below for reference.


My current theory is this:
A window that still has children windows is being closed.

The function in which this crashes is the lambda connected to &PlasmaWindow::parentWindowChanged in waylandtasksmodel.cpp:635.

The lambda is only invoked, because QObject::destroyed is connected to &PlasmaWindow::parentWindowChanged in waylandtasksmodel:320

Qt does a direct connection here, so then parentWindowChanged is invoked as part of the destructor of PlasmaWindow, which is probably not what's wanted here. Possibly a QueuedConnection would fix this.

My theory is that the window that is being deleted is accessed by the code called in the result of the destructor.

I don't have a proper setup to test my theory right now.


STEPS TO REPRODUCE
Currently unknown


SOFTWARE/OS VERSIONS
KDE Plasma Version:  6.1.1