Bug#834750: libqt5widgets5: wireshark crashes with SIGSEGV in QTreeModel::index ( only with a11y )

Crash stack trace.

Core was generated by `wireshark'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 QTreeModel::index (this=this@entry=0x55e565f9aca0, item=0x55e5661d1238, column=column@entry=0) at itemviews/qtreewidget.cpp:236
236 itemviews/qtreewidget.cpp: No such file or directory.
[Current thread is 1 (Thread 0x7f980eacf940 (LWP 5639))]
(gdb) bt
#0 0x00007f9808bd6223 in QTreeModel::index(QTreeWidgetItem const*, int) const (this=this@entry=0x55e565f9aca0, item=0x55e5661d1238, column=column@entry=0) at itemviews/qtreewidget.cpp:236
#1 0x00007f9808bd635b in QTreeModel::parent(QModelIndex const&) const (this=0x55e565f9aca0, child=...) at itemviews/qtreewidget.cpp:294
#2 0x00007f9808ba79fb in QTreeView::isIndexHidden(QModelIndex const&) const (this=0x55e56c625ec8) at ../../include/QtCore/../../src/corelib/itemmodels/qabstractitemmodel.h:411
#3 0x00007f9808ba79fb in QTreeView::isIndexHidden(QModelIndex const&) const (this=0x55e565f2ee10, index=...) at itemviews/qtreeview.cpp:3044
#4 0x00007f9808ba9ebf in QTreeView::visualRect(QModelIndex const&) const (this=0x55e565f2ee10, index=...) at itemviews/qtreeview.cpp:1106
#5 0x00007f9808b4f62a in QAccessibleTableCell::rect() const (this=0x55e56c625ea0) at accessible/itemviews.cpp:1057
#6 0x00007f97f9fc2c2e in AtSpiAdaptor::accessibleInterfaces(QAccessibleInterface*) const (this=this@entry=0x55e5675ec930, interface=interface@entry=0x55e56c625ea0) at linuxaccessibility/atspiadaptor.cpp:1466
#7 0x00007f97f9fc995c in AtSpiAdaptor::accessibleInterface(QAccessibleInterface*, QString const&, QDBusMessage const&, QDBusConnection const&) (this=this@entry=0x55e5675ec930, interface=interface@entry=0x55e56c625ea0, function=..., message=..., connection=...) at linuxaccessibility/atspiadaptor.cpp:1406
#8 0x00007f97f9fc9ed9 in AtSpiAdaptor::accessibleInterface(QAccessibleInterface*, QString const&, QDBusMessage const&, QDBusConnection const&) (this=0x55e5675ec930, interface=0x55e56c625ea0, function=..., message=..., connection=...)
at linuxaccessibility/atspiadaptor.cpp:1362
#9 0x00007f97f9fce2ec in AtSpiAdaptor::handleMessage(QDBusMessage const&, QDBusConnection const&) (this=0x55e5675ec930, message=..., connection=...) at linuxaccessibility/atspiadaptor.cpp:1276
#10 0x00007f97f8a174f8 in QDBusConnectionPrivate::activateObject(QDBusConnectionPrivate::ObjectTreeNode&, QDBusMessage const&, int) (this=0x7f97e4010100, node=..., msg=..., pathStartPos=27) at qdbusintegrator.cpp:1431
#11 0x00007f97f8a19f7e in QDBusActivateObjectEvent::placeMetaCall(QObject*) (this=0x7f97e4014780) at qdbusintegrator.cpp:1590
#12 0x00007f9807ff3729 in QObject::event(QEvent*) (this=0x55e5675ec930, e=<optimized out>) at kernel/qobject.cpp:1256
#13 0x00007f9808901bec in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x55e5675ec930, e=0x7f97e4014780) at kernel/qapplication.cpp:3804
#14 0x00007f980890708f in QApplication::notify(QObject*, QEvent*) (this=0x7ffd967e1c30, receiver=0x55e5675ec930, e=0x7f97e4014780) at kernel/qapplication.cpp:3561
#15 0x00007f9807fc5450 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x55e5675ec930, event=event@entry=0x7f97e4014780) at kernel/qcoreapplication.cpp:1015
#16 0x00007f9807fc73cc in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x7f97e4014780, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:225
#17 0x00007f9807fc73cc in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data="" at kernel/qcoreapplication.cpp:1650
#18 0x00007f9807fc7888 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1508
#19 0x00007f980801b0f3 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x55e565cefc40) at kernel/qeventdispatcher_glib.cpp:270
#20 0x00007f980e7baff7 in g_main_context_dispatch (context=0x7f97f00016f0) at ././glib/gmain.c:3154
#21 0x00007f980e7baff7 in g_main_context_dispatch (context=context@entry=0x7f97f00016f0) at ././glib/gmain.c:3769
#22 0x00007f980e7bb260 in g_main_context_iterate (context=context@entry=0x7f97f00016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3840
#23 0x00007f980e7bb30c in g_main_context_iteration (context=0x7f97f00016f0, may_block=may_block@entry=1) at ././glib/gmain.c:3901
#24 0x00007f980801b4ff in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x55e565cf3590, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#25 0x00007f9807fc319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffd967e1a30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#26 0x00007f9807fcb99c in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1285
#27 0x000055e565118c55 in main ()
(gdb) Quit