Crash when calling QJSValue::hasProperty("x") from Qml on a QVector3D received from a Q_PROPERTY

#include <QtGui/QtGui>
#include <QtQuick/QtQuick>

class Chose : public QObject
{
	Q_OBJECT
	Q_PROPERTY(QVector3D f READ ff NOTIFY fChanged())
public:
	Chose(QObject *parent = nullptr) : QObject(parent) {}
	QVector3D ff() const
	{
		return QVector3D();
	}
	Q_INVOKABLE void g(QJSValue v)
	{
		v.hasProperty("x"); // The crash occurs here
	}
signals:
	void fChanged();
};

// I make moc BugQVector3DQml.cpp > ChoseMoc.cpp
// That's why this include there:
#include "ChoseMoc.cpp"

int main(int nargs, char **args)
{
	QGuiApplication app(nargs,args);
	QQuickView view;
	Chose chose;
	view.engine()->rootContext()->setContextProperty("chose",&chose);
	QTemporaryFile temp_file_because_qquickview_doesnt_have_setRoot("XXXXXX.qml");
	if(!temp_file_because_qquickview_doesnt_have_setRoot.open())
	{
		qCritical() << "Can't open a temporary file for writing the qml source to be loaded.";
		return -1;
	}
	{
		QTextStream stream(&temp_file_because_qquickview_doesnt_have_setRoot);
		stream << QString(R"fin(
				
			import QtQuick 2.0
			Rectangle
			{
				width: 100;
				height: 100;
				color: 'blue'
				property var allo: chose.g(chose.f) // This leads to the crash above
			}
				
			)fin");
	}
	view.setSource(QUrl::fromLocalFile(temp_file_because_qquickview_doesnt_have_setRoot.fileName()));
	view.show();
	return app.exec();
}

#ifdef _DEBUG
#pragma comment(lib,"Qt6Quickd.lib")
#pragma comment(lib,"Qt6Guid.lib")
#pragma comment(lib,"Qt6Cored.lib")
#pragma comment(lib,"Qt6Qmld.lib")
#else
#pragma comment(lib,"Qt6Quick.lib")
#pragma comment(lib,"Qt6Gui.lib")
#pragma comment(lib,"Qt6Core.lib")
#pragma comment(lib,"Qt6Qml.lib")
#endif