Created attachment 33065 [details] additional unit tests Add unit tests to make sure you cannot create a row outside the spreadsheet limits per https://support.office.com/en-nz/article/Excel-specifications-and-limits-1672b34d-7043-467e-8e27-269d656771c3 65k for HSSFSheet 1M for XSSFSheet
Thanks a lot for the patch, this is now applied via r1704186.