Thread 1 "textedit" received signal SIGSEGV, Segmentation fault.
0x00007ffff7b05f6f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
(gdb) bt
#0  0x00007ffff7b05f6f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#1  0x00007ffff7ea5c26 in AtSpiAdaptor::notify (this=0x76b630, event=<optimized out>) at linuxaccessibility/atspiadaptor.cpp:1066
#2  0x00007ffff7b44ff0 in QListView::selectionChanged(QItemSelection const&, QItemSelection const&) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#3  0x00007ffff7b1f5a1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#4  0x00007ffff701de89 in QMetaObject::activate (sender=sender@entry=0x612260, signalOffset=<optimized out>, 
    local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffffffc860) at kernel/qobject.cpp:3740
#5  0x00007ffff701e837 in QMetaObject::activate (sender=sender@entry=0x612260, m=m@entry=0x7ffff7234ee0 <QItemSelectionModel::staticMetaObject>, 
    local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffffffc860) at kernel/qobject.cpp:3602
#6  0x00007ffff6fa27e7 in QItemSelectionModel::selectionChanged (this=this@entry=0x612260, _t1=..., _t2=...) at .moc/moc_qitemselectionmodel.cpp:478
#7  0x00007ffff6fa701b in QItemSelectionModel::emitSelectionChanged (this=this@entry=0x612260, newSelection=..., oldSelection=...)
    at itemmodels/qitemselectionmodel.cpp:1811
#8  0x00007ffff6faaaf2 in QItemSelectionModel::select (this=0x612260, selection=..., command=...) at itemmodels/qitemselectionmodel.cpp:1298
#9  0x00007ffff6fa456c in QItemSelectionModel::select (this=this@entry=0x612260, index=..., command=command@entry=...)
    at itemmodels/qitemselectionmodel.cpp:1159
#10 0x00007ffff6fa2c34 in QItemSelectionModel::setCurrentIndex (this=0x612260, index=..., command=...) at itemmodels/qitemselectionmodel.cpp:1373
#11 0x00007ffff79d64f1 in QComboBox::showPopup() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007ffff79d7295 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007ffff79198ef in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007ffff79d3396 in QComboBox::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007ffff78d1ecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007ffff78da165 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007ffff6ff30c8 in QCoreApplication::notifyInternal2 (receiver=0x6112f0, event=0x7fffffffd1d0) at kernel/qcoreapplication.cpp:988
#18 0x00007ffff78d8e8f in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007ffff7933236 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007ffff7935c83 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007ffff78d1ecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007ffff78d98c6 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007ffff6ff30c8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x64ef40, event=event@entry=0x7fffffffd5e0)
    at kernel/qcoreapplication.cpp:988
#24 0x00007ffff73365a0 in QCoreApplication::sendSpontaneousEvent (event=0x7fffffffd5e0, receiver=0x64ef40)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#25 QGuiApplicationPrivate::processMouseEvent (e=0x8cb2c0) at kernel/qguiapplication.cpp:1903