warning message "QHttpNetworkConnectionChannel::_q_receiveReply() called without QHttpNetworkReply"

I am getting the following warning message "QHttpNetworkConnectionChannel::_q_receiveReply() called without QHttpNetworkReply, 0 bytes on socket." I have attached a sample file which reproduces the warning.

In the sample I was able to get the warning randomly if I used on the QNetworkAccessManager or QWebView. Using them both together appears to produce the warning every time.

My application has it's own threaded web server built on QTcpServer. When serving web pages from the server, I get this warning multiple times, but the pages display properly.