QJSEngine has no way of controlling object ownership

0	__GI_raise		56	0x7ffff6065bb9	
1	__GI_abort		89	0x7ffff6068fc8	
2	__libc_message		175	0x7ffff60a2e14	
3	malloc_printerr		4996	0x7ffff60af0ee	
4	_int_free		3840	0x7ffff60af0ee	
5	Object::~Object	main.cpp	5	0x403a96	
6	(anonymous namespace)::QObjectDeleter::~QObjectDeleter	qv4qobjectwrapper.cpp	1018	0x7ffff727c7ed	
7	(anonymous namespace)::QObjectDeleter::~QObjectDeleter	qv4qobjectwrapper.cpp	1021	0x7ffff727c83a	
8	QV4::MemoryManager::sweep	qv4mm.cpp	377	0x7ffff7204463	
9	QV4::MemoryManager::~MemoryManager	qv4mm.cpp	515	0x7ffff7204d4a	
10	QV4::ExecutionEngine::~ExecutionEngine	qv4engine.cpp	421	0x7ffff71ec562	
11	QV8Engine::~QV8Engine	qv8engine.cpp	116	0x7ffff736b748	
12	QV8Engine::~QV8Engine	qv8engine.cpp	117	0x7ffff736b7d4	
13	QJSEngine::~QJSEngine	qjsengine.cpp	203	0x7ffff716f2d8	
14	main	main.cpp	54	0x40240b	

#include <QtWidgets>
#include <QJSEngine>
#include <QtQml>

class Object : public QObject
{
    Q_OBJECT
public:
    Object() {
    }
};

Q_DECLARE_METATYPE(const Object*)

class ObjectProcessor : public QObject
{
    Q_OBJECT
public:
    ObjectProcessor() {
    }

    Q_INVOKABLE void process(const Object *object) {
        qDebug() << object;
    }
};

#define BUG
//#define QML_WORKAROUND
//#define HEAP_WORKAROUND

int main(int argc, char** argv)
{
    QApplication app(argc, argv);

    QMainWindow window;
    window.resize(400, 400);
    window.show();

#ifdef BUG
    ObjectProcessor objectProcessor;
    Object object;
#ifdef QML_WORKAROUND
    QQmlEngine::setObjectOwnership(&objectProcessor, QQmlEngine::CppOwnership);
    QQmlEngine::setObjectOwnership(&object, QQmlEngine::CppOwnership);
#endif
#endif
#ifdef HEAP_WORKAROUND
    ObjectProcessor* objectProcessor = new ObjectProcessor;
    Object *object = new Object;
#endif

    qRegisterMetaType<const Object*>();

    QJSEngine jsEngine;
    QJSValue evaluationResult = jsEngine.evaluate("function stuff(object, objectProcessor) { objectProcessor.process(object); }");
    if (evaluationResult.isError()) {
        qWarning() << evaluationResult.toString();
    }

    QJSValueList args;
#if defined(BUG) || defined(QML_WORKAROUND)
    args << jsEngine.newQObject(&object) << jsEngine.newQObject(&objectProcessor);
#endif
#ifdef HEAP_WORKAROUND
    args << jsEngine.newQObject(object) << jsEngine.newQObject(objectProcessor);
#endif
    QJSValue callResult = jsEngine.globalObject().property("stuff").call(args);
    if (callResult.isError()) {
        qWarning() << callResult.toString();
    }

    return app.exec();
}

#include "main.moc"