QHostAddress::clear() isn't same that QHostAddress::setAddress("0.0.0.0")

In documentation says:

void QHostAddress::clear()
Sets the host address to 0.0.0.0.

But in this code:

QHostAddress addrFoo, addrBar;

addrFoo.clear();
addrBar.setAddress("0.0.0.0");

if (addrFoo == addrBar) {
    qDebug() << "Foo == Bar";
} else {
    qDebug() << "Foo != Bar";
}

will be output "Foo != Bar".
Because “clear()” method sets the host address to 0.0.0.0 or :: and set protocol to QAbstractSocket::UnknownNetworkLayerProtocol
In documentation says nothing about protocol.