OSX 10.8.4: QPrinter::setPaperName() causes a crash

#include "mainwindow.h"
#include <QApplication>

#include <QPrinter>
#include <QPrinterInfo>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    QPrinter * printer = new QPrinter();
    QPrinterInfo pInfo(*printer);
    QList<QPair<QString, QSizeF> > papers = pInfo.supportedSizesWithNames();
    if(papers.size() != 0){
        //Calling setPaperName causes us to crash comment this line out and it works.
        //This works on OSX 10.7 Crashes on OSX 10.8.
        printer->setPaperName(papers.begin()->first);
        w.setWindowTitle(papers.begin()->first);
    }

    QString pName = printer->printerName();
    printer->setPrinterName(pName);

    return a.exec();
}