Stacktrace crash qml binding

0	QV4::QObjectWrapper::wrap(QV4::ExecutionEngine *, QObject *)	QV4::QObjectWrapper::wrap(QV4::ExecutionEngine*, QObject*)		0x1028995d8
1	QV4::QObjectWrapper::getProperty(QObject *, QV4::ExecutionContext *, QQmlPropertyData *, bool)	QV4::QObjectWrapper::getProperty(QObject*, QV4::ExecutionContext*, QQmlPropertyData*, bool)		0x102897aef
2	QV4::QObjectWrapper::getQmlProperty(QQmlContextData *, QV4::String *, QV4::QObjectWrapper::RevisionMode, bool *, bool)	QV4::QObjectWrapper::getQmlProperty(QQmlContextData*, QV4::String*, QV4::QObjectWrapper::RevisionMode, bool*, bool)		0x102897225
3	QV4::Runtime::getProperty(QV4::ExecutionEngine *, QV4::Value const&, int)	QV4::Runtime::getProperty(QV4::ExecutionEngine*, QV4::Value const&, int)		0x1028aedd6
4	QV4::Moth::VME::run(QV4::ExecutionEngine *, unsigned const char *, void * * *)	QV4::Moth::VME::run(QV4::ExecutionEngine*, unsigned char const*, void***)		0x1028a29dd
5	QV4::Moth::VME::exec(QV4::ExecutionEngine *, unsigned const char *)	QV4::Moth::VME::exec(QV4::ExecutionEngine*, unsigned char const*)		0x1028a4bfe
6	QV4::ScriptFunction::call(QV4::Managed *, QV4::CallData *)	QV4::ScriptFunction::call(QV4::Managed*, QV4::CallData*)		0x1028484cb
7	QQmlJavaScriptExpression::evaluate(QQmlContextData *, QV4::Value const&, QV4::CallData *, bool *)	QQmlJavaScriptExpression::evaluate(QQmlContextData*, QV4::Value const&, QV4::CallData*, bool*)		0x10293f4f9
8	QQmlBoundSignalExpression::evaluate(void * *)	QQmlBoundSignalExpression::evaluate(void**)		0x1028e7d35
9	QQmlBoundSignal_callback(QQmlNotifierEndpoint *, void * *)	QQmlBoundSignal_callback(QQmlNotifierEndpoint*, void**)		0x1028e8738
10	QQmlNotifier::emitNotify(QQmlNotifierEndpoint *, void * *)	QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**)		0x1029218fc
11	QQmlData::signalEmitted(QAbstractDeclarativeData *, QObject *, int, void * *)	QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**)		0x1028c4f49
12	QMetaObject::activate(QObject *, int, int, void * *)	QMetaObject::activate(QObject*, int, int, void**)		0x102330087
13	QQmlTimer::event(QEvent *)	QQmlTimer::event(QEvent*)		0x1029b6fad
14	QApplicationPrivate::notify_helper(QObject *, QEvent *)	QApplicationPrivate::notify_helper(QObject*, QEvent*)		0x102dc86fb
15	QApplication::notify(QObject *, QEvent *)	QApplication::notify(QObject*, QEvent*)		0x102dcbade
16	QCoreApplicationPrivate::sendPostedEvents(QObject *, int, QThreadData *)	QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*)		0x102300e8b
17	QCocoaEventDispatcherPrivate::processPostedEvents()	QCocoaEventDispatcherPrivate::processPostedEvents()		0x106c2808e
18	QCocoaEventDispatcherPrivate::postedEventsSourceCallback(void *)	QCocoaEventDispatcherPrivate::postedEventsSourceCallback(void*)		0x106c28911
19	__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__	__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__		0x7fff98482a01
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