setNumericMode() looses its property every time you change locale in QCollator

#include <QApplication>
#include <QCollator>
#include <QDebug>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
     QCollator collator;
    collator.setNumericMode( true );
    qDebug() << QLocale::system();
    qDebug() << collator.locale();

    collator.setLocale( QLocale::system()); 
    qDebug() << collator.locale();
    collator.setLocale( collator.locale() ); 
    qDebug() << collator.locale();
    collator.setLocale( QLocale() );
    qDebug() << collator.locale();
    //collator.setNumericMode( true ); // uncomment it to compare in natural way otherwise it will do it lexically
    qDebug()<<collator.compare( "Test 8", "Test 79" );

    return 0;
}