Bug 44510

Created attachment 21602 [details]
Cell G6 contains a simple dropdown. Reading and writing back to a new xls doesn't work in 3.0.2

I'd like to read a simple Excel file containing a dropdown list (data validation) and write it back into a new one. The whole thing worked with POI 3.0.1 but not in
with the new POI revision 3.0.2:

1. Read a simple Excel-file with dropdown:
	InputStream input = MyClass.class.getResourceAsStream(
"simple_dropdown.xls" );
	POIFSFileSystem fs = new POIFSFileSystem( input );
	HSSFWorkbook wb = new HSSFWorkbook(fs);

2. Write the Excel file into another file:
	FileOutputStream out = new FileOutputStream("output.xls");
	wb.write(out);
	out.close();

Now, here's the thing:
- My Excel file only contains a dropdown-list, no further special formatting or other stuff!
- If i do the steps above with POI 3.0.1, the dropdown list still exists
in the output file
- If i do the exact same thing with POI 3.0.2, the dropdown is gone in the output-file. The cell only contains the value which was selected in the input file. The validation rule of the cell is also gone, it is set back to "any value".

Am I doing anything wrong?

Michael