QPainterPath::pointAtPercent(t) returns wrong values when the path is empty

#include <QPainterPath>
#include <QDebug>

int main()
{
    QPainterPath path;
    path.moveTo(100, 100);
    path.cubicTo(100, 100, 100, 100, 100, 100);
    qDebug() << path.pointAtPercent(0) << path.pointAtPercent(1);
}