Error in operator checks for equality class QVariant as a null QUuid

#include <QDebug>
#include <QUuid>
#include <QVariant>


int main()
{
    QUuid u1 = QUuid();
    QVariant v1 = u1;

    QUuid u2 = u1;
    QString s2 = u2.toString();
    QVariant v2 = s2;

    qDebug() << (v1 == v2); // true
    qDebug() << (v2 == v1); // false

    return 0;
}