80M of rows crash QTableView while 70M do not

If you insert about 80M rows into QTableView, it crashes application inside the framework.

But 70M rows do not cause this problem.

When I look at the source code briefly, a part of framework tries to calculate the height of the entire scollable area in pixel and reaches 240M (integer overflow) when cell height is 30 pixels.

I think that inserting 80M of rows into QTableView is not impossible usage and hope this would be better handled without a problem.