infinite loop in QTableView::sizeHintForRow

 I am currently investigating an infinite loop in Qt5Widgetsd.dll!QTableView::sizeHintForRow(int row)
 here is a demonstration of the infinite loop in 5.9.3 QTableView::sizeHintForRow --https://paiza.io/projects/xr80iqOdEs7XNTPYlHUyWA 
 I believe the flaw is in this line: if ((columnsProcessed % 2 && idxLeft > 0) || idxRight == actualRight)

it should say idxRight >= actualRight }}{{ 
instead of  idxRight == actualRight

Maybe this is happening because my custom QSortFilterProxyModel implemented filterAcceptsColumn to exclude one column, but it didn't reimplement columnCount? 

Update: No, I tested my custom QSortFilterProxyModel that uses filterAcceptsColumn, and it seems to be returning the correct column count even without reimplementing columnCount. It remains unclear why index var "right" could be 24, when the range should be 0 to 23. As you can see from the code sample, actualRight was 23, therefore columnCount was returning 24, which was correct. This analysis points to visualIndexAt being the potential culprit that had initialized index var "right" as 24.