delayed creation of QAttribute with parent in constructor causes crash

#include <QtGui>
#include <Qt3DCore>
#include <Qt3DRender>
#include <Qt3DExtras>

using namespace Qt3DCore;
using namespace Qt3DRender;
using namespace Qt3DExtras;

auto test(QEntity *parent) -> QEntity*
{
    auto entity = new QEntity{parent};
    auto material = new QDiffuseSpecularMaterial;
    entity->addComponent(material);

    QVector3D pos[] = {{0, 0, 5}, {1, 0, 5}, {0, 1, 5}};
    auto buffer = new Qt3DCore::QBuffer;
    buffer->setData(QByteArray(reinterpret_cast<const char*>(pos), sizeof(pos)));
#define ERROR_CASE
#ifdef ERROR_CASE
    auto positions = new QAttribute(entity);
#else
    auto positions = new QAttribute;
    positions->setParent(entity);
#endif
    positions->setBuffer(buffer);
    positions->setName(QAttribute::defaultPositionAttributeName());
    positions->setVertexBaseType(QAttribute::Float);
    positions->setVertexSize(3);
    positions->setCount(3);

    auto geometry = new QGeometry;
    geometry->addAttribute(positions);
    auto view = new QGeometryView;
    view->setGeometry(geometry);
    view->setPrimitiveType(QGeometryView::Triangles);

    auto renderer = new QGeometryRenderer;
    renderer->setView(view);
    entity->addComponent(renderer);

    return entity;
}

int main(int argc, char *argv[])
{
    qputenv("QT3D_RENDERER", "opengl");
    qputenv("QSG_RHI_BACKEND", "opengl");

    QGuiApplication a(argc, argv);

    Qt3DWindow view;

    auto camera = view.camera();
    camera->setPosition(QVector3D(0, 0, 10));
    camera->setViewCenter(QVector3D(0, 0, 0));

    auto root = new QEntity;
    QTimer::singleShot(0, [&] { test(root); });
    view.setRootEntity(root);
    view.show();

    return a.exec();
}