Hi, After Bug 15050 is fixed,I tried to make a sheet with HSSFWorkbook#cloneSheet() cheerfully,and I found a problem.We can't create a row(with HSSFSheet#createRow ()) to the sheet made by HSSFWorkbook#cloneSheet().
Created attachment 5687 [details] A simple testcase to find it.NullPointerException is caused at line22.
help its attack of the clones! He has a test case. This is a good bug. I'm on the fence as to whether its serious enough to hold up 2.0. I'm erring on the side of yes because he submits test cases.... :-)
Works. Testcase added.