"QLocalSocket::waitForDisconnected() is not allowed in UnconnectedState" error shown with the code from the QLocalSocket documentation

If one follows the code example in QLocalSocket::waitForDisconnected() and do:

socket->disconnectFromServer();
if (socket->waitForDisconnected(1000))
    qDebug("Disconnected!");

It gives an error:
"QLocalSocket::waitForDisconnected() is not allowed in UnconnectedState"

on Windows.

Could it be that the state is changed too early before waitForDisconnected() has returned?