QNetworkReply: Throttling causes download to fail

#include <QHBoxLayout>
#include <QLabel>
#include <QWidget>
#include <QApplication>
#include <QtNetwork>

class MyWidget: public QWidget
{
   Q_OBJECT

public:
   MyWidget(QWidget *parent = 0);

private:
   QNetworkReply *m_reply;
   QTimer m_dlTimer;

protected slots:
   void replyFinished(QNetworkReply*);
   void onReadAndReschedule();
};

MyWidget::MyWidget(QWidget *parent) : QWidget(parent), m_reply(NULL), m_dlTimer(this)
{
   setWindowTitle("Support Tester");
   QHBoxLayout* layout = new QHBoxLayout;
   layout->addWidget(new QLabel("Notice that the download will not complete if it is at" \
                                "least ~1 MB and throttling is set to ~65000 or lower."));
   setLayout(layout);

   QNetworkAccessManager* nam = new QNetworkAccessManager(this);
   connect(nam, SIGNAL(finished(QNetworkReply*)), SLOT(replyFinished(QNetworkReply*)));

   // Download a ~800k file
   QNetworkRequest netRequest(QUrl("http://get.qt.nokia.com/qtjambi/source/qtjambi-eclipse-integration-linux64-4.4.3_01.tar.gz"));
   m_reply = nam->get(netRequest);

   // Set the throttle, try a lower value if the bug doesn't repro with this one.
   m_reply->setReadBufferSize(36000);

   connect(&m_dlTimer, SIGNAL(timeout()), SLOT(onReadAndReschedule()));
   m_dlTimer.setSingleShot(true);
   m_dlTimer.start(0);
}


void MyWidget::replyFinished(QNetworkReply*)
{
   qDebug("Finished successfully!");
   m_dlTimer.stop();
}


void MyWidget::onReadAndReschedule()
{
   const qint64 bytesReceived = m_reply->bytesAvailable();

   if (bytesReceived) {
      QByteArray data = m_reply->read(bytesReceived);
      const int millisecDelay = static_cast<int>(bytesReceived * 1000 / m_reply->readBufferSize());
      
      qDebug() << "bytesReceived: " << bytesReceived << "Rescheduling in"
               << millisecDelay << "milliseconds.";
      
      m_dlTimer.start(millisecDelay);
   }
   else {
      // BUG: The QNetworkReply has stopped responding near the end of the download.
      // The last chunk of data is never returned, and the reply never enters an error state.
       qDebug() << "NO DATA! Error:" << m_reply->error()
                << "Finished:" << m_reply->isFinished()
                << "Running:" << m_reply->isRunning();
      
      // Retry
      m_dlTimer.start(200);
   }
}


#include "main.moc"

int main(int argc, char *argv[])
{
   QApplication app(argc, argv);
   MyWidget *myWin = new MyWidget();
   myWin->show();
   return app.exec();
}