Created attachment 35496 [details] patch created using "ant -f patch.xml" The merge functionality of cell ranges in org.apache.poi.ss.util.CellRangeUtil.mergeCellRanges(CellRangeAddress[]) is broken: some of the provided input cell ranges get lost during merge under circumstances. Example: Merge of cell ranges (A1), (B1) and (A2) results in cell ranges (A1:A2). (B1) gets lost. The Patch provides test cases revealing the broken merge functionality and testing its fix in CellRangeUtil. The patch was created using "ant -f patch.xml".
Applied in r1814432. Thanks for the patch.
This seems to be applied already, so setting to resolved.