Created attachment 119526 [details] crash log SUMMARY STEPS TO REPRODUCE 1. Open "Application Launcher" 2. Right-click an Application quickly 3. Plasma may crash OBSERVED RESULT Plasma panels crash and restart soon EXPECTED RESULT Pop-up a menu SOFTWARE/OS VERSIONS Linux/KDE Plasma: ArchLinux (available in About System) KDE Plasma Version: 5.15.4 KDE Frameworks Version: 5.56.0 Qt Version: 5.12.2 ADDITIONAL INFORMATION
Crashes in QtWayland. Relevant part of backtrace from comment #0: Thread 1 (Thread 0x7f219f643880 (LWP 605)): [KCrash Handler] #6 0x00007f21a463e5f8 in operator<<(QDebug, QObject const*) () at /usr/lib/libQt5Core.so.5 #7 0x00007f2194d9177c in QtWaylandClient::QWaylandXdgSurface::setGrabPopup(QtWaylandClient::QWaylandWindow*, QtWaylandClient::QWaylandInputDevice*, int) () at /usr/lib/qt/plugins/wayland-shell-integration/libxdg-shell.so #8 0x00007f2194d91ead in QtWaylandClient::QWaylandXdgShell::getXdgSurface(QtWaylandClient::QWaylandWindow*) () at /usr/lib/qt/plugins/wayland-shell-integration/libxdg-shell.so #9 0x00007f219ece4efd in QtWaylandClient::QWaylandWindow::initWindow() () at /usr/lib/libQt5WaylandClient.so.5 #10 0x00007f219ece5457 in QtWaylandClient::QWaylandWindow::setVisible(bool) () at /usr/lib/libQt5WaylandClient.so.5 #11 0x00007f219c048bf5 in () at /usr/lib/qt/plugins/wayland-graphics-integration-client/libqt-plugin-wayland-egl.so #12 0x00007f21a49f52dc in QWindowPrivate::setVisible(bool) () at /usr/lib/libQt5Gui.so.5 #13 0x00007f21a5189f29 in QWidgetPrivate::show_sys() () at /usr/lib/libQt5Widgets.so.5 #14 0x00007f21a51934b1 in QWidgetPrivate::show_helper() () at /usr/lib/libQt5Widgets.so.5 #15 0x00007f21a5196775 in QWidgetPrivate::setVisible(bool) () at /usr/lib/libQt5Widgets.so.5 #16 0x00007f21a52d07f2 in QMenu::popup(QPoint const&, QAction*) () at /usr/lib/libQt5Widgets.so.5 #17 0x00007f21962a3bd1 in () at /usr/lib/qt/qml/org/kde/plasma/components/libplasmacomponentsplugin.so
I believe this is fixed in Qt5.13