Application: systemsettings5 (5.11.5)

Qt Version: 5.10.0
Frameworks Version: 5.42.0
Operating System: Linux 4.9.73-1-lts x86_64
Distribution: "Arch Linux"

-- Information about the crash:
- What I was doing when the application crashed:

 * Selected the plasma-nm connection settings panel under Network>Connections.
 * Did NOT make or apply any changes
 * Quit the Settings application using the Ctrl+Q shortcut.
 * This is when the segfault happened.

- I can't reproduce the bug ad-hoc (i.e. by simply repeating the above sequence of actions once or more).
- I seem to recall that a similar case has happened before.

The crash can be reproduced sometimes.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fd6cf8fcc80 (LWP 2935))]

Thread 8 (Thread 0x7fd68b68c700 (LWP 3694)):
#0  0x00007fd6cbe43a4c in  () at /usr/lib/libQt5Core.so.5
#1  0x00007fd6c502a519 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd6c502af1e in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd6c502b10e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007fd6cbe43d24 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fd6cbde5e9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fd6cbbf578e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007fd6c9c64a19 in  () at /usr/lib/libQt5Qml.so.5
#8  0x00007fd6cbbfab2d in  () at /usr/lib/libQt5Core.so.5
#9  0x00007fd6c724c08c in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007fd6cb502e7f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fd690f04700 (LWP 3692)):
#0  0x00007fd6cb4f43d8 in read () at /usr/lib/libc.so.6
#1  0x00007fd6c50707d1 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd6c502aac8 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd6c502af96 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fd6c502b3b2 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#5  0x00007fd69243e6d8 in  () at /usr/lib/libgio-2.0.so.0
#6  0x00007fd6c505326a in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007fd6c724c08c in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fd6cb502e7f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fd691705700 (LWP 3691)):
#0  0x00007fd6cb4f43d8 in read () at /usr/lib/libc.so.6
#1  0x00007fd6c50707d1 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd6c502aac8 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd6c502af96 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fd6c502b10e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007fd6c502b162 in  () at /usr/lib/libglib-2.0.so.0
#6  0x00007fd6c505326a in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007fd6c724c08c in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fd6cb502e7f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fd69cc52700 (LWP 2940)):
#0  0x00007fd6c502a4d5 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#1  0x00007fd6c502af1e in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd6c502b10e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd6cbe43d24 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fd6cbde5e9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fd6cbbf578e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fd6c9c64a19 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007fd6cbbfab2d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fd6c724c08c in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fd6cb502e7f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fd6a4af3700 (LWP 2939)):
#0  0x00007fd6c4ffde60 in g_ptr_array_set_size () at /usr/lib/libglib-2.0.so.0
#1  0x00007fd6c502a402 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd6c502af1e in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd6c502b10e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007fd6cbe43d24 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fd6cbde5e9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fd6cbbf578e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007fd6c9c64a19 in  () at /usr/lib/libQt5Qml.so.5
#8  0x00007fd6cbbfab2d in  () at /usr/lib/libQt5Core.so.5
#9  0x00007fd6c724c08c in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007fd6cb502e7f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fd6b34d3700 (LWP 2937)):
#0  0x00007fd6c5071b79 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007fd6c502a525 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd6c502af1e in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd6c502b10e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007fd6cbe43d24 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fd6cbde5e9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fd6cbbf578e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007fd6cc265416 in  () at /usr/lib/libQt5DBus.so.5
#8  0x00007fd6cbbfab2d in  () at /usr/lib/libQt5Core.so.5
#9  0x00007fd6c724c08c in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007fd6cb502e7f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fd6bc05f700 (LWP 2936)):
#0  0x00007fd6cb4f897b in poll () at /usr/lib/libc.so.6
#1  0x00007fd6c7acf8e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007fd6c7ad1679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007fd6bee0d7aa in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007fd6cbbfab2d in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fd6c724c08c in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fd6cb502e7f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fd6cf8fcc80 (LWP 2935)):
[KCrash Handler]
#5  0x00007fd6ca16e8e4 in QQuickItem::isVisible() const () at /usr/lib/libQt5Quick.so.5
#6  0x00007fd6ca16ed5a in  () at /usr/lib/libQt5Quick.so.5
#7  0x00007fd6ca16e6cf in QQuickItemPrivate::filterKeyEvent(QKeyEvent*, bool) () at /usr/lib/libQt5Quick.so.5
#8  0x00007fd6ca17ae76 in QQuickItemPrivate::deliverKeyEvent(QKeyEvent*) () at /usr/lib/libQt5Quick.so.5
#9  0x00007fd6ca17b1d6 in QQuickItem::event(QEvent*) () at /usr/lib/libQt5Quick.so.5
#10 0x00007fd6cda06ecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#11 0x00007fd6cda0e8a6 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#12 0x00007fd6cbde7850 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#13 0x00007fd6ca1867aa in QQuickWindowPrivate::deliverKeyEvent(QKeyEvent*) () at /usr/lib/libQt5Quick.so.5
#14 0x00007fd6ca18ae96 in QQuickWindow::keyPressEvent(QKeyEvent*) () at /usr/lib/libQt5Quick.so.5
#15 0x00007fd6cd209a35 in QWindow::event(QEvent*) () at /usr/lib/libQt5Gui.so.5
#16 0x00007fd6ca195626 in QQuickWindow::event(QEvent*) () at /usr/lib/libQt5Quick.so.5
#17 0x00007fd6cda06ecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#18 0x00007fd6cda0e8a6 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#19 0x00007fd6cbde7850 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#20 0x00007fd6ca8181dd in QQuickWidget::keyPressEvent(QKeyEvent*) () at /usr/lib/libQt5QuickWidgets.so.5
#21 0x00007fd6cda47818 in QWidget::event(QEvent*) () at /usr/lib/libQt5Widgets.so.5
#22 0x00007fd6ca819b1c in QQuickWidget::event(QEvent*) () at /usr/lib/libQt5QuickWidgets.so.5
#23 0x00007fd6cda06ecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#24 0x00007fd6cda0fe33 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#25 0x00007fd6cbde7850 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#26 0x00007fd6cda64b1b in  () at /usr/lib/libQt5Widgets.so.5
#27 0x00007fd6cda06ecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#28 0x00007fd6cda0e8a6 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#29 0x00007fd6cbde7850 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#30 0x00007fd6cd1fa012 in QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent*) () at /usr/lib/libQt5Gui.so.5
#31 0x00007fd6cd1ff166 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/libQt5Gui.so.5
#32 0x00007fd6cd1d6bbc in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Gui.so.5
#33 0x00007fd6bee952ed in  () at /usr/lib/libQt5XcbQpa.so.5
#34 0x00007fd6cbde5e9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#35 0x00007fd6cbdef188 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#36 0x00005604f8cc3cca in  ()
#37 0x00007fd6cb42df4a in __libc_start_main () at /usr/lib/libc.so.6
#38 0x00005604f8cc3d4a in _start ()

Reported using DrKonqi