I found memory leak with QTextCodec::codecForName on Qt4.6. How can I get rid of it?

I found memory leak with QTextCodec::codecForName on Qt4.6, WindowsXP, VS2008.

For testing, I wrote a simple application.

Code:

---

int main(int argc, char *argv[]) 
{ 
    QApplication app(argc, argv); 
    QTextCodec::setCodecForCStrings(QTextCodec::codecForName("EUC-KR")); 
 
    QPushButton hello("한글 테스트"); 
    QObject::connect(&hello, SIGNAL(clicked()), &app, SLOT(quit())); 
 
    hello.show(); 
 
    return app.exec(); 
}

---

This code make some memory leak.

If I commented out line4, there is no memory leak. (However, my application needs the codec. )

//QTextCodec::setCodecForCStrings(QTextCodec::codecF orName("EUC-KR"));

In the official Qt documents, they mention that QApplication will de-allocate the QTextCodec's memory.

But, in my opinion, It doesn't work.

How can I get rid of this leak? or Is there something that I missed?