No error when registering C++ singleton and QML singleton into the same module name

#include <QGuiApplication>
#include <QQmlApplicationEngine>

class Logging : public QObject
{
    Q_OBJECT

public:
    Logging() = default;
};

QObject *loggingSingletonTypeProvider(QQmlEngine *, QJSEngine *)
{
    return new Logging();
}

int main(int argc, char *argv[])
{
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

    QGuiApplication app(argc, argv);

    qmlRegisterSingletonType<Logging>("Foo", 1, 0, "Logging", loggingSingletonTypeProvider);

    QQmlApplicationEngine engine;
    const QUrl url(QStringLiteral("qrc:/main.qml"));
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
                     &app, [url](QObject *obj, const QUrl &objUrl) {
        if (!obj && url == objUrl)
            QCoreApplication::exit(-1);
    }, Qt::QueuedConnection);
    engine.load(url);

    return app.exec();
}

#include "main.moc"

import QtQuick 2.12
import QtQuick.Window 2.12

import Foo 1.0

import "logging"

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    Component.onCompleted: console.log(Logging.main, "this is a message from main")
}