Application: systemsettings (1.0)
KDE Platform Version: 4.10.5
Qt Version: 4.8.5
Operating System: Linux 3.10.11 x86_64
Distribution: Debian GNU/Linux testing (jessie)

-- Information about the crash:
Simply open System Settings, then click 'Input Settings', next click 'Touchpad'.
Voila.
I think it started happening after last update of kde-config-touchpad (synaptiks) in Debian testing.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[KCrash Handler]
#5  0x00007f20e1ed4a36 in KAboutData::~KAboutData() () from /usr/lib/libkdecore.so.5
#6  0x00007f20bdaa937e in ?? () from /usr/lib/python2.7/dist-packages/PyKDE4/kdecore.so
#7  0x00007f20bd302556 in ?? () from /usr/lib/python2.7/dist-packages/sip.so
#8  0x00007f20bd303619 in ?? () from /usr/lib/python2.7/dist-packages/sip.so
#9  0x00007f20bde1ba22 in subtype_dealloc.25618 (self=0x1ddf320) at ../Objects/typeobject.c:1030
#10 0x00007f20bde93b9f in dict_dealloc.18717 (mp=0x1dc5e00) at ../Objects/dictobject.c:1010
#11 0x00007f20bd30099b in ?? () from /usr/lib/python2.7/dist-packages/sip.so
#12 0x00007f20bd303544 in ?? () from /usr/lib/python2.7/dist-packages/sip.so
#13 0x00007f20bd303621 in ?? () from /usr/lib/python2.7/dist-packages/sip.so
#14 0x00007f20bde1ba22 in subtype_dealloc.25618 (self=0x1ddf0e0) at ../Objects/typeobject.c:1030
#15 0x00007f20bde93769 in frame_dealloc.15024 (f=0x1dc6a10) at ../Objects/frameobject.c:460
#16 0x00007f20bde93e2b in tb_dealloc.46543 (tb=0x1f69050) at ../Python/traceback.c:28
#17 0x00007f20bde93e3b in tb_dealloc.46543 (tb=0x1f69098) at ../Python/traceback.c:27
#18 0x00007f20bde73c57 in PyDict_DelItem (op=op@entry=0x15313b0, key=key@entry=0x1f67ea0) at ../Objects/dictobject.c:854
#19 0x00007f20bde73e8c in PyDict_DelItemString (v=0x15313b0, key=key@entry=0x7f20bdf2f58e "exc_traceback") at ../Objects/dictobject.c:2452
#20 0x00007f20bde46811 in PySys_SetObject (name=name@entry=0x7f20bdf2f58e "exc_traceback", v=<optimized out>) at ../Python/sysmodule.c:80
#21 0x00007f20bdeca182 in reset_exc_info (tstate=0x14bb390) at ../Python/ceval.c:3443
#22 PyEval_EvalFrameEx (f=f@entry=0x15cd840, throwflag=throwflag@entry=0) at ../Python/ceval.c:2996
#23 0x00007f20bde10142 in PyEval_EvalCodeEx (co=<optimized out>, globals=<optimized out>, locals=locals@entry=0x0, args=<optimized out>, argcount=2, kws=0x1b71c98, kwcount=0, defs=0x1c066e8, defcount=1, closure=0x0) at ../Python/ceval.c:3253
#24 0x00007f20bdece20d in fast_function (nk=<optimized out>, na=<optimized out>, n=2, pp_stack=0x7fffb02c3010, func=0x1c04de8) at ../Python/ceval.c:4117
#25 call_function (oparg=<optimized out>, pp_stack=0x7fffb02c3010) at ../Python/ceval.c:4042
#26 PyEval_EvalFrameEx (f=f@entry=0x1b71af0, throwflag=throwflag@entry=0) at ../Python/ceval.c:2666
#27 0x00007f20bde10142 in PyEval_EvalCodeEx (co=<optimized out>, globals=<optimized out>, locals=locals@entry=0x0, args=<optimized out>, argcount=3, kws=0x1aae7d0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3253
#28 0x00007f20bdece20d in fast_function (nk=<optimized out>, na=<optimized out>, n=3, pp_stack=0x7fffb02c3300, func=0x1c0c140) at ../Python/ceval.c:4117
#29 call_function (oparg=<optimized out>, pp_stack=0x7fffb02c3300) at ../Python/ceval.c:4042
#30 PyEval_EvalFrameEx (f=f@entry=0x1aae5e0, throwflag=throwflag@entry=0) at ../Python/ceval.c:2666
#31 0x00007f20bde10142 in PyEval_EvalCodeEx (co=<optimized out>, globals=<optimized out>, locals=locals@entry=0x0, args=args@entry=0x1ac7568, argcount=3, kws=kws@entry=0x0, kwcount=kwcount@entry=0, defs=defs@entry=0x0, defcount=defcount@entry=0, closure=0x0) at ../Python/ceval.c:3253
#32 0x00007f20bde102f6 in function_call (func=0x1c0c1b8, arg=0x1ac7550, kw=0x0) at ../Objects/funcobject.c:526
#33 0x00007f20bde67a7e in PyObject_Call (func=func@entry=0x1c0c1b8, arg=arg@entry=0x1ac7550, kw=<optimized out>) at ../Objects/abstract.c:2529
#34 0x00007f20bde68387 in PyEval_CallObjectWithKeywords (func=0x1c0c1b8, arg=0x1ac7550, kw=<optimized out>) at ../Python/ceval.c:3890
#35 0x00007f20c70d3d3d in ?? () from /usr/lib/kde4/kpythonpluginfactory.so
#36 0x00007f20c70d487e in ?? () from /usr/lib/kde4/kpythonpluginfactory.so
#37 0x00007f20e37b87ce in KCModuleLoader::loadModule(KCModuleInfo const&, KCModuleLoader::ErrorReporting, QWidget*, QStringList const&) () from /usr/lib/libkcmutils.so.4
#38 0x00007f20e37bda1b in ?? () from /usr/lib/libkcmutils.so.4
#39 0x00007f20e37be085 in KCModuleProxy::realModule() const () from /usr/lib/libkcmutils.so.4
#40 0x00007f20e37be483 in KCModuleProxy::showEvent(QShowEvent*) () from /usr/lib/libkcmutils.so.4
#41 0x00007f20e2486aa9 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#42 0x00007f20e243770c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#43 0x00007f20e243dd80 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#44 0x00007f20e315acfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#45 0x00007f20e17b7b5d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#46 0x00007f20e24841ff in QWidgetPrivate::show_helper() () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#47 0x00007f20e248406a in QWidgetPrivate::showChildren(bool) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#48 0x00007f20e24840ff in QWidgetPrivate::show_helper() () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#49 0x00007f20e2485eb4 in QWidget::setVisible(bool) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#50 0x00007f20e248407e in QWidgetPrivate::showChildren(bool) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#51 0x00007f20e24840ff in QWidgetPrivate::show_helper() () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#52 0x00007f20e2485eb4 in QWidget::setVisible(bool) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#53 0x00007f20e2469c52 in QStackedLayout::setCurrentIndex(int) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#54 0x00007f20e3186b5e in ?? () from /usr/lib/libkdeui.so.5
#55 0x00007f20e17cbcf8 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#56 0x00007f20e297bfa7 in QItemSelectionModel::selectionChanged(QItemSelection const&, QItemSelection const&) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#57 0x00007f20e29815d7 in QItemSelectionModel::emitSelectionChanged(QItemSelection const&, QItemSelection const&) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#58 0x00007f20e2981de3 in QItemSelectionModel::select(QItemSelection const&, QFlags<QItemSelectionModel::SelectionFlag>) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#59 0x00007f20e318969c in ?? () from /usr/lib/libkdeui.so.5
#60 0x00007f20e2951cb0 in QListView::setSelection(QRect const&, QFlags<QItemSelectionModel::SelectionFlag>) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#61 0x00007f20e292e18a in QAbstractItemView::mousePressEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#62 0x00007f20e2486b81 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#63 0x00007f20e282495e in QFrame::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#64 0x00007f20e29339d3 in QAbstractItemView::viewportEvent(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#65 0x00007f20e17b7cc6 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#66 0x00007f20e24376ec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#67 0x00007f20e243debd in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#68 0x00007f20e315acfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#69 0x00007f20e17b7b5d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#70 0x00007f20e243d673 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#71 0x00007f20e24af3cb in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#72 0x00007f20e24ade3c in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#73 0x00007f20e24d5792 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#74 0x00007f20da825ea6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#75 0x00007f20da8261f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#76 0x00007f20da82629c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#77 0x00007f20e17e4ce5 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#78 0x00007f20e24d5846 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#79 0x00007f20e17b67bf in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#80 0x00007f20e17b6ab5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#81 0x00007f20e17bc0fb in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#82 0x000000000040aacb in ?? ()
#83 0x00007f20e0faa995 in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#84 0x000000000040ab21 in _start ()

Reported using DrKonqi