Bug 369355

Application: systemsettings5 (5.8.90)

Qt Version: 5.7.0
Frameworks Version: 5.27.0
Operating System: Linux 4.4.0-38-lowlatency x86_64
Distribution: KDE neon User Edition 5.7

-- Information about the crash:
From the System Settings input devices applet, or from the command line. Running from Neon development repository on top of Kubuntu Xenial.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fbb7947a8c0 (LWP 4832))]

Thread 4 (Thread 0x7fbb64910700 (LWP 4960)):
#0  0x00007fbb7fa13ae4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbb7f9cf391 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbb7f9cf722 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbb64bf9916 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fbb7f9f5bc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbb818766fa in start_thread (arg=0x7fbb64910700) at pthread_create.c:333
#6  0x00007fbb8466bb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fbb66c26700 (LWP 4959)):
#0  0x00007fbb8465fe8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbb7f9cf39c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbb7f9cf4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbb7f9cf4e9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbb7f9f5bc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbb818766fa in start_thread (arg=0x7fbb66c26700) at pthread_create.c:333
#6  0x00007fbb8466bb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fbb74f3e700 (LWP 4833)):
#0  0x00007fbb8465fe8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbb7f9cf39c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbb7f9cf4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbb84f8a23b in QEventDispatcherGlib::processEvents (this=0x7fbb700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fbb84f34cea in QEventLoop::exec (this=this@entry=0x7fbb74f3dcd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#5  0x00007fbb84d59fb4 in QThread::exec (this=this@entry=0x7fbb880e6d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:507
#6  0x00007fbb880727a5 in QDBusConnectionManager::run (this=0x7fbb880e6d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:196
#7  0x00007fbb84d5eb98 in QThreadPrivate::start (arg=0x7fbb880e6d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:344
#8  0x00007fbb818766fa in start_thread (arg=0x7fbb74f3e700) at pthread_create.c:333
#9  0x00007fbb8466bb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fbb7947a8c0 (LWP 4832)):
[KCrash Handler]
#6  0x00007fbb4726828b in TouchpadConfig::TouchpadConfig (this=0x1d763d0, parent=<optimized out>, args=...) at /workspace/build/kcms/touchpad/src/kcm/touchpadconfig.cpp:185
#7  0x00007fbb472653bb in KPluginFactory::createInstance<TouchpadConfig, QWidget> (parentWidget=<optimized out>, parent=<optimized out>, args=...) at /usr/include/KF5/KCoreAddons/kpluginfactory.h:477
#8  0x00007fbb851cafdf in KPluginFactory::create(char const*, QWidget*, QObject*, QList<QVariant> const&, QString const&) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#9  0x00007fbb87ac4216 in KCModuleLoader::loadModule(KCModuleInfo const&, KCModuleLoader::ErrorReporting, QWidget*, QStringList const&) () from /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#10 0x00007fbb87acb6ef in ?? () from /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#11 0x00007fbb87acc2e5 in KCModuleProxy::realModule() const () from /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#12 0x00007fbb87acc833 in KCModuleProxy::showEvent(QShowEvent*) () from /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#13 0x00007fbb86462398 in QWidget::event (this=0x220d9b0, event=0x7ffe3a1fab70) at kernel/qwidget.cpp:9144
#14 0x00007fbb8641b89c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x220d9b0, e=0x7ffe3a1fab70) at kernel/qapplication.cpp:3799
#15 0x00007fbb86423296 in QApplication::notify (this=0x7ffe3a1fc340, receiver=0x220d9b0, e=0x7ffe3a1fab70) at kernel/qapplication.cpp:3556
#16 0x00007fbb84f36cf8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x220d9b0, event=event@entry=0x7ffe3a1fab70) at kernel/qcoreapplication.cpp:988
#17 0x00007fbb8645f0c3 in QCoreApplication::sendEvent (event=0x7ffe3a1fab70, receiver=0x220d9b0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#18 QWidgetPrivate::show_helper (this=0x1ea7370) at kernel/qwidget.cpp:7912
#19 0x00007fbb8645ee16 in QWidgetPrivate::show_recursive (this=<optimized out>) at kernel/qwidget.cpp:7783
#20 0x00007fbb8645ef27 in QWidgetPrivate::showChildren (this=this@entry=0x1f690a0, spontaneous=spontaneous@entry=false) at kernel/qwidget.cpp:8289
#21 0x00007fbb8645efbf in QWidgetPrivate::show_helper (this=this@entry=0x1f690a0) at kernel/qwidget.cpp:7859
#22 0x00007fbb86461dbd in QWidget::setVisible (this=0x24eb180, visible=<optimized out>) at kernel/qwidget.cpp:8208
#23 0x00007fbb8645ef38 in QWidgetPrivate::showChildren (this=this@entry=0x1d66010, spontaneous=spontaneous@entry=false) at kernel/qwidget.cpp:8291
#24 0x00007fbb8645efbf in QWidgetPrivate::show_helper (this=this@entry=0x1d66010) at kernel/qwidget.cpp:7859
#25 0x00007fbb86461dbd in QWidget::setVisible (this=0x2418320, visible=<optimized out>) at kernel/qwidget.cpp:8208
#26 0x00007fbb86443c25 in QStackedLayout::setCurrentIndex (this=0x17bc7a0, index=2) at kernel/qstackedlayout.cpp:325
#27 0x00007fbb86443e04 in QStackedLayout::setCurrentWidget (this=0x17bc7a0, widget=widget@entry=0x2418320) at kernel/qstackedlayout.cpp:380
#28 0x00007fbb865a8eb1 in QStackedWidget::setCurrentWidget (this=<optimized out>, widget=0x2418320) at widgets/qstackedwidget.cpp:250
#29 0x00007fbb86a08435 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#30 0x00007fbb84f61b09 in QMetaObject::activate (sender=sender@entry=0x1b36d30, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe3a1fb100) at kernel/qobject.cpp:3740
#31 0x00007fbb84f624b7 in QMetaObject::activate (sender=sender@entry=0x1b36d30, m=m@entry=0x7fbb8517df00 <QItemSelectionModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe3a1fb100) at kernel/qobject.cpp:3602
#32 0x00007fbb84ee6b47 in QItemSelectionModel::selectionChanged (this=this@entry=0x1b36d30, _t1=..., _t2=...) at .moc/moc_qitemselectionmodel.cpp:478
#33 0x00007fbb84eeb32c in QItemSelectionModel::emitSelectionChanged (this=this@entry=0x1b36d30, newSelection=..., oldSelection=...) at itemmodels/qitemselectionmodel.cpp:1867
#34 0x00007fbb84eeee52 in QItemSelectionModel::select (this=0x1b36d30, selection=..., command=...) at itemmodels/qitemselectionmodel.cpp:1298
#35 0x00007fbb866856b1 in QListView::setSelection (this=<optimized out>, rect=..., command=...) at itemviews/qlistview.cpp:1386
#36 0x00007fbb8666701b in QAbstractItemView::mousePressEvent (this=0x17c4d40, event=<optimized out>) at itemviews/qabstractitemview.cpp:1793
#37 0x00007fbb86462c4f in QWidget::event (this=this@entry=0x17c4d40, event=event@entry=0x7ffe3a1fba70) at kernel/qwidget.cpp:8774
#38 0x00007fbb8654876e in QFrame::event (this=0x17c4d40, e=0x7ffe3a1fba70) at widgets/qframe.cpp:550
#39 0x00007fbb8666d573 in QAbstractItemView::viewportEvent (this=0x17c4d40, event=0x7ffe3a1fba70) at itemviews/qabstractitemview.cpp:1745
#40 0x00007fbb84f36a62 in QCoreApplicationPrivate::sendThroughObjectEventFilters (receiver=receiver@entry=0x1a67020, event=event@entry=0x7ffe3a1fba70) at kernel/qcoreapplication.cpp:1099
#41 0x00007fbb8641b875 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x1a67020, e=0x7ffe3a1fba70) at kernel/qapplication.cpp:3795
#42 0x00007fbb86423b35 in QApplication::notify (this=<optimized out>, receiver=0x1a67020, e=0x7ffe3a1fba70) at kernel/qapplication.cpp:3273
#43 0x00007fbb84f36cf8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x1a67020, event=event@entry=0x7ffe3a1fba70) at kernel/qcoreapplication.cpp:988
#44 0x00007fbb8642285f in QCoreApplication::sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#45 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x1a67020, event=event@entry=0x7ffe3a1fba70, alienWidget=alienWidget@entry=0x1a67020, nativeWidget=0x15493d0, buttonDown=buttonDown@entry=0x7fbb8691dc30 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:2771
#46 0x00007fbb8647c090 in QWidgetWindow::handleMouseEvent (this=this@entry=0x16770e0, event=event@entry=0x7ffe3a1fbe80) at kernel/qwidgetwindow.cpp:613
#47 0x00007fbb8647e863 in QWidgetWindow::event (this=0x16770e0, event=0x7ffe3a1fbe80) at kernel/qwidgetwindow.cpp:239
#48 0x00007fbb8641b89c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x16770e0, e=0x7ffe3a1fbe80) at kernel/qapplication.cpp:3799
#49 0x00007fbb86423296 in QApplication::notify (this=0x7ffe3a1fc340, receiver=0x16770e0, e=0x7ffe3a1fbe80) at kernel/qapplication.cpp:3556
#50 0x00007fbb84f36cf8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x16770e0, event=event@entry=0x7ffe3a1fbe80) at kernel/qcoreapplication.cpp:988
#51 0x00007fbb85e810a0 in QCoreApplication::sendSpontaneousEvent (event=0x7ffe3a1fbe80, receiver=0x16770e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#52 QGuiApplicationPrivate::processMouseEvent (e=0x20de810) at kernel/qguiapplication.cpp:1909
#53 0x00007fbb85e82fa5 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x20de810) at kernel/qguiapplication.cpp:1693
#54 0x00007fbb85e60e6b in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:654
#55 0x00007fbb790f6bb0 in userEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /usr/lib/x86_64-linux-gnu/libQt5WaylandClient.so.5
#56 0x00007fbb7f9cf1a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#57 0x00007fbb7f9cf400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#58 0x00007fbb7f9cf4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#59 0x00007fbb84f8a21f in QEventDispatcherGlib::processEvents (this=0x1509af0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#60 0x00007fbb84f34cea in QEventLoop::exec (this=this@entry=0x7ffe3a1fc220, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#61 0x00007fbb84f3d2fc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261
#62 0x00007fbb85e78d9c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1639
#63 0x00007fbb8641b7f5 in QApplication::exec () at kernel/qapplication.cpp:2975
#64 0x000000000040c110 in main (argc=1, argv=<optimized out>) at /workspace/build/app/main.cpp:56

Reported using DrKonqi