QHttpNetworkReplyPrivate::expectContent() call request.operation() when request.d is NULL (using in QtWebkit)

bool QHttpNetworkReplyPrivate::expectContent()
{
    // check whether we can expect content after the headers (rfc 2616, sec4.4)
    if ((statusCode >= 100 && statusCode < 200)
        || statusCode == 204 || statusCode == 304)
        return false;
    /*if (request.Is_d_isNull())
    {
        return false;
    }*/
    //some time request.d is NULL 
    if (request.operation() == QHttpNetworkRequest::Head)
        return !shouldEmitSignals();
    qint64 expectedContentLength = contentLength();
    if (expectedContentLength == 0)
        return false;
    if (expectedContentLength == -1 && bodyLength == 0) {
        // The content-length header was stripped, but its value was 0.
        // This would be the case for an explicitly zero-length compressed response.
        return false;
    }
    return true;
}