QUdpSocket::readDatagram() returns null QHostAddress

When reading a UDP datagram with readDatagram the QHostAddress is not being set correctly with 5.10.0. This works correctly in 5.9.2.

I have attached a test case which demonstrates the problem:

1. Run udptest --server
2. Run udptest
3. Observe that under 5.9.2 the output of the server will include the ip of the client, while under 5.10.0 an empty string will output where the ip address should be.