QPrintDialog error

See the given code.

QPrinter printer;
printer.setOutputFormat(QPrinter::NativeFormat);
QPrintDialog printDialog(&printer, this);
if (printDialog.exec()){

}

When I execute this code, the dialog doesn't open and the next message is shown on "application output":

QPrintDialog: Cannot be used on non-native printers

QPrintDialog: Cannot be used on non-native printers

The QPainter is set to native format, so the error message has no sense.

I have tried this also using Qt5.3.0 and Qt5.3.2 and the dialog is created properly without any error log message.