QTableView can't handle models with high row counts

I've noticed that if I have a QAbstractItemModel whose rowCount returns a value greater than 0x4444444 the QTableView will query rowCount, columnCount, index, and flags for the root item but nothing else.

Without changing anything else in the model but limiting rowCount to the above value works as expected: the view queries index/flags/data and displays everything correctly.

Since rowCount is an int, on a 64bit system I'd expect the view to support up to 0x7fffffff rows; 0x4444444 is a curious number to have as limit.