setReverse() silently fails for a category axis

{{

QStringList categories;
categories << "level 1" << "level 2" << "level 3" << "level 4" << "Level 5" << "Level 6" << "level 7" << "level 8" << "level 9" << "level 10";

QBarCategoryAxis *axisY_bid = new QBarCategoryAxis();
axisY_bid->append(categories);
// XXX setReverse does NOTHING
axisY_bid->setReverse(true);
printf("Y reversed=%d\n", axisY_bid->isReverse())

}}

➜ [hal@tugboat 12:34 ~/qtcharts/horizontalstackedbarchart] ./horizontalstackedbarchart
Y reversed=0