#ifndef COLLECTOR_H
#define COLLECTOR_H

#include <QtCore/qobject.h>
#include <QtQmlIntegration/qqmlintegration.h>
#include <QtQml/qjsengine.h>

class Collector : public QObject
{
    Q_OBJECT
    QML_ELEMENT

public:
    Q_INVOKABLE void gc()
    {
        qjsEngine(this)->collectGarbage();
    }
};

#endif // COLLECTOR_H

pragma Strict
import QtQml

Collector {
    id: self
    property Component c: QtObject { objectName: "dynamic" }
    property QtObject o: c.createObject()

    Component.onCompleted: {
        var oo = o
        o = null
        self.gc()
        o = oo
    }
}

#include <QGuiApplication>
#include <QQmlApplicationEngine>

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);

    QQmlApplicationEngine engine;
    QObject::connect(
        &engine,
        &QQmlApplicationEngine::objectCreated,
        &app,
        [](QObject *o) {
            qDebug() << o->property("o");
            QCoreApplication::exit(0);
        },
        Qt::QueuedConnection);
    engine.loadFromModule("deletedobjects", "Main");

    return app.exec();
}