Bug 408941

Application: kcmshell5 (5.16.1)

Qt Version: 5.12.4
Frameworks Version: 5.59.0
Operating System: Linux 5.1.11-arch1-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

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

Just open the Displays system settings (I do that via krunner) and then click the external screen -> immediate crash, always reproducible.
This just happens since my very latest upgrade.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings Module (kcmshell5), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4617f94640 (LWP 2467))]

Thread 5 (Thread 0x7f460d85f700 (LWP 2472)):
#0  0x00007f461e7c6497 in poll () from /usr/lib/libc.so.6
#1  0x00007f461b0187c0 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f461b0188ae in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f461d330094 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f461d2d9abc in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f461d11e1f9 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f461c6ed969 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f461d11f5fc in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f461bfd857f in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f461e7d0f13 in clone () from /usr/lib/libc.so.6

Thread 4 (Thread 0x7f460eec5700 (LWP 2471)):
#0  0x00007f461bfde3c5 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007f460f37af5c in ?? () from /usr/lib/dri/i965_dri.so
#2  0x00007f460f37ab58 in ?? () from /usr/lib/dri/i965_dri.so
#3  0x00007f461bfd857f in start_thread () from /usr/lib/libpthread.so.0
#4  0x00007f461e7d0f13 in clone () from /usr/lib/libc.so.6

Thread 3 (Thread 0x7f4615a01700 (LWP 2469)):
#0  0x00007f461e7c1fbc in read () from /usr/lib/libc.so.6
#1  0x00007f461afc6961 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f461b016f70 in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#3  0x00007f461b018766 in ?? () from /usr/lib/libglib-2.0.so.0
#4  0x00007f461b0188ae in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#5  0x00007f461d330094 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#6  0x00007f461d2d9abc in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#7  0x00007f461d11e1f9 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#8  0x00007f461e275ba6 in ?? () from /usr/lib/libQt5DBus.so.5
#9  0x00007f461d11f5fc in ?? () from /usr/lib/libQt5Core.so.5
#10 0x00007f461bfd857f in start_thread () from /usr/lib/libpthread.so.0
#11 0x00007f461e7d0f13 in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7f4617148700 (LWP 2468)):
#0  0x00007f461e7c6497 in poll () from /usr/lib/libc.so.6
#1  0x00007f461bcc8630 in ?? () from /usr/lib/libxcb.so.1
#2  0x00007f461bcca2db in xcb_wait_for_event () from /usr/lib/libxcb.so.1
#3  0x00007f4617affb59 in ?? () from /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f461d11f5fc in ?? () from /usr/lib/libQt5Core.so.5
#5  0x00007f461bfd857f in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f461e7d0f13 in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f4617f94640 (LWP 2467)):
[KCrash Handler]
#6  0x00007f461d6e8316 in QHighDpiScaling::mapPositionFromGlobal(QPoint const&, QPoint const&, QWindow const*) () from /usr/lib/libQt5Gui.so.5
#7  0x00007f461d6b8ac4 in QWindow::mapFromGlobal(QPoint const&) const () from /usr/lib/libQt5Gui.so.5
#8  0x00007f461caa1cd0 in QQuickWindow::event(QEvent*) () from /usr/lib/libQt5Quick.so.5
#9  0x00007f461dcaada4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#10 0x00007f461dcb23c1 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#11 0x00007f461d2daef9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
#12 0x00007f461ce712bc in QQuickWidget::event(QEvent*) () from /usr/lib/libQt5QuickWidgets.so.5
#13 0x00007f461dcaada4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#14 0x00007f461dcb23c1 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#15 0x00007f461d2daef9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
#16 0x00007f461dcb13cd in ?? () from /usr/lib/libQt5Widgets.so.5
#17 0x00007f461dcb1e04 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) () from /usr/lib/libQt5Widgets.so.5
#18 0x00007f461dd06a93 in ?? () from /usr/lib/libQt5Widgets.so.5
#19 0x00007f461dd09b57 in ?? () from /usr/lib/libQt5Widgets.so.5
#20 0x00007f461dcaada4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#21 0x00007f461dcb23c1 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#22 0x00007f461d2daef9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
#23 0x00007f461d6b2105 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /usr/lib/libQt5Gui.so.5
#24 0x00007f461d6b3546 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/libQt5Gui.so.5
#25 0x00007f461d68e55c in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Gui.so.5
#26 0x00007f4617b00b7c in ?? () from /usr/lib/libQt5XcbQpa.so.5
#27 0x00007f461b01690f in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#28 0x00007f461b018869 in ?? () from /usr/lib/libglib-2.0.so.0
#29 0x00007f461b0188ae in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#30 0x00007f461d330079 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#31 0x00007f461d2d9abc in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#32 0x00007f461d2e1c46 in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#33 0x00007f461e8a15f3 in kdemain () from /usr/lib/libkdeinit5_kcmshell5.so
#34 0x00007f461e6fbee3 in __libc_start_main () from /usr/lib/libc.so.6
#35 0x0000556aa15c905e in _start ()
[Inferior 1 (process 2467) detached]

Reported using DrKonqi