QNetworkReply incorrectly report ContentReSendError for unrelated QNetworkReply

#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QDebug>
#include <QCoreApplication>
#include <QUrl>
#include <QTextStream>
using namespace std;

int main(int argc,char** argv)
{
	   QTextStream in(stdin,QIODevice::ReadOnly);
	   QCoreApplication loop(argc,argv);
	   QNetworkAccessManager manager;
	   QByteArray content("123");
	   QNetworkRequest request(QUrl("http://www.yahoo.com"));
	   request.setAttribute(QNetworkRequest::DoNotBufferUploadDataAttribute,QVariant(true));
	   while(1)
	   {
			   QNetworkReply* reply=manager.post(request,content);
			   QObject::connect(reply,SIGNAL(finished()),&loop,SLOT(quit()));
			   loop.exec();
			   QNetworkReply::NetworkError error=reply->error();
			   if(error!=QNetworkReply::NoError)
					   qDebug()<<"error: "<<error;
			   else
					   qDebug()<<"success";
			   reply->deleteLater();
			   in.readLine();
	   }
}