FileDialog causes crash at startup

0	QSharedDataPointer<QFileDialogOptionsPrivate>::operator->() const	qshareddata.h	69	0x102a48acc	
1	QFileDialogOptions::initiallySelectedNameFilter() const	qplatformdialoghelper.cpp	605	0x102a475e3	
2	QCocoaFileDialogHelper::selectedNameFilter() const	qcocoafiledialoghelper.mm	667	0x1096dc000	
3	QQuickAbstractFileDialog::selectedNameFilter() const	qquickabstractfiledialog.cpp	142	0x10b040dac	
4	QQuickAbstractFileDialog::selectedNameFilterExtensions() const	qquickabstractfiledialog.cpp	171	0x10b040f1a	
5	QQuickAbstractFileDialog::qt_static_metacall(QObject *, QMetaObject::Call, int, void * *)	moc_qquickabstractfiledialog_p.cpp	252	0x10b05ada0	
6	QQuickAbstractFileDialog::qt_metacall(QMetaObject::Call, int, void * *)	moc_qquickabstractfiledialog_p.cpp	315	0x10b05b3ff	
7	QQuickFileDialog::qt_metacall(QMetaObject::Call, int, void * *)	moc_qquickfiledialog_p.cpp	193	0x10b05ce13	
8	QQuickPlatformFileDialog::qt_metacall(QMetaObject::Call, int, void * *)	moc_qquickplatformfiledialog_p.cpp	84	0x10b05c864	
9	QQmlVMEMetaObject::metaCall(QMetaObject::Call, int, void * *)	qqmlvmemetaobject.cpp	971	0x100302047	
10	QAbstractDynamicMetaObject::metaCall(QObject *, QMetaObject::Call, int, void * *)	qobject_p.h	421	0x100038362	
11	QMetaObject::metacall(QObject *, QMetaObject::Call, int, void * *)	qmetaobject.cpp	294	0x1012ee37f	
12	QV4::QQmlSequence<QStringList>::loadReference() const	qv4sequenceobject.cpp	516	0x1002838f5	
13	QV4::Heap::QQmlSequence<QStringList>::QQmlSequence(QV4::ExecutionEngine *, QObject *, int)	qv4sequenceobject.cpp	568	0x1002878c2	
14	QV4::Heap::QQmlSequence<QStringList>::QQmlSequence(QV4::ExecutionEngine *, QObject *, int)	qv4sequenceobject.cpp	570	0x1002877db	
15	QV4::QQmlSequence<QStringList>::Data * QV4::MemoryManager::alloc<QV4::QQmlSequence<QStringList>, QV4::ExecutionEngine *, QObject *, int>(QV4::ExecutionEngine *, QObject *, int)	qv4mm_p.h	126	0x10027d7fc	
16	QV4::SequencePrototype::newSequence(QV4::ExecutionEngine *, int, QObject *, int, bool *)	qv4sequenceobject.cpp	659	0x100279bcc	
17	unsigned long long LoadProperty<&(ReadAccessor::Direct(QObject *, QQmlPropertyData const&, void *, QQmlNotifier * *))>(QV4::ExecutionEngine *, QObject *, QQmlPropertyData const&, QQmlNotifier * *)	qv4qobjectwrapper.cpp	218	0x1002bec2f	
18	QV4::QObjectWrapper::getProperty(QObject *, QV4::ExecutionContext *, QQmlPropertyData *, bool)	qv4qobjectwrapper.cpp	390	0x1002bdb4f	
19	QV4::QObjectWrapper::getProperty(QObject *, QV4::ExecutionContext *, int, bool)	qv4qobjectwrapper.cpp	654	0x1002c1557	
20	QV4::Runtime::getQmlQObjectProperty(QV4::ExecutionEngine *, QV4::Value const&, int, bool)	qv4runtime.cpp	1366	0x1002e64d7	
21	None	None		0x10b3f3dc0	
22	QV4::SimpleScriptFunction::call(QV4::Managed *, QV4::CallData *)	qv4functionobject.cpp	564	0x1002410bb	
23	QV4::Object::call(QV4::CallData *)	qv4object_p.h	302	0x100146a59	
24	QQmlJavaScriptExpression::evaluate(QQmlContextData *, QV4::Value const&, QV4::CallData *, bool *)	qqmljavascriptexpression.cpp	158	0x1003bb8aa	
25	QQmlBoundSignalExpression::evaluate(void * *)	qqmlboundsignal.cpp	281	0x10033cecb	
26	QQmlBoundSignal_callback(QQmlNotifierEndpoint *, void * *)	qqmlboundsignal.cpp	408	0x10033d94a	
27	QQmlNotifier::emitNotify(QQmlNotifierEndpoint *, void * *)	qqmlnotifier.cpp	73	0x100396550	
28	QQmlData::signalEmitted(QAbstractDeclarativeData *, QObject *, int, void * *)	qqmlengine.cpp	751	0x100308c57	
29	QMetaObject::activate(QObject *, int, int, void * *)	qobject.cpp	3603	0x101334c67	
30	QMetaObject::activate(QObject *, QMetaObject const *, int, void * *)	qobject.cpp	3583	0x101334b5d	
31	QQmlComponentAttached::completed()	moc_qqmlcomponentattached_p.cpp	135	0x10046db7b	
32	QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&)	qqmlobjectcreator.cpp	1235	0x1003d93be	
33	QQmlComponentPrivate::complete(QQmlEnginePrivate *, QQmlComponentPrivate::ConstructionState *)	qqmlcomponent.cpp	928	0x10032dbcc	
34	QQmlComponentPrivate::completeCreate()	qqmlcomponent.cpp	964	0x10032c15b	
35	QQmlComponent::completeCreate()	qqmlcomponent.cpp	957	0x10032dc82	
36	QQmlComponent::create(QQmlContext *)	qqmlcomponent.cpp	791	0x10032d3ec	
37	QQmlApplicationEnginePrivate::_q_finishLoad(QObject *)	qqmlapplicationengine.cpp	130	0x1003c7bbb	
38	QQmlApplicationEnginePrivate::startLoad(QUrl const&, QByteArray const&, bool)	qqmlapplicationengine.cpp	109	0x1003c7950	
39	QQmlApplicationEngine::load(QString const&)	qqmlapplicationengine.cpp	264	0x1003c80e1	
40	main	main		0x1000061ff	
41	start	start		0x100003ec4	

QString QCocoaFileDialogHelper::selectedNameFilter() const
{
    if (!mDelegate)
        return options()->initiallySelectedNameFilter();
    int index = [mDelegate->mPopUpButton indexOfSelectedItem];
    if (index >= options()->nameFilters().count())
        return QString();
    return index != -1 ? options()->nameFilters().at(index) : QString();
}