Comment # 5 on bug 1139463 from Wolfgang Bauer

(In reply to Ms Hmm from comment #4)
> Uninstalling Discover (and backend pacakages) and then replacing them with
> the 5.16.2 packages from the KDE:Frameworks5 repo gives this error on launch:
> file:///usr/lib64/qt5/qml/QtQuick/Controls.2/org.kde.desktop/private/
> MobileTextActionsToolBar.qml:62: TypeError: Cannot read property
> 'selectedText' of null
> file:///usr/lib64/qt5/qml/QtQuick/Controls.2/org.kde.desktop/private/
> MobileTextActionsToolBar.qml:70: TypeError: Cannot read property
> 'selectedText' of null
> file:///usr/lib64/qt5/qml/QtQuick/Controls.2/org.kde.desktop/private/
> MobileTextActionsToolBar.qml:78: TypeError: Cannot read property 'canPaste'
> of null
> adding empty sources model QStandardItemModel(0x557a07e8b5d0)
> Segmentation fault (core dumped)
Ok, the QML errors are the same as before, probably because you reinstalled
qqc2-desktop-style, but that doesn't seem to be the reason for the crash
anyway.

> I've searched on Google for anyone else having similar problems, but the
> only ones I can find are from more than a year ago when Plasma 5.12 came
> out. Searching KDE forums and KDE bugs draws a blank, so at the moment I
> think it is openSUSe specific.
That's not necessarily an indication for an openSUSE specific problem though,
especially on Tumbleweed. Most distributions are not as up-to-date... ;-)

I'd still suggest filing an upstream bug report.

This seems to be relevant though:
Adding empty sources model QStandardItemModel(0x55e521fad920)