NextNameOriginal() is called in MergeClassAd(), which is called by code that uses chained ads. MergeClassAd() appears to do the wrong thing if the merge_from ad is chained and has the same attribute (but different values) in parent and child.
NextNameOriginal() also called by the schedd's dollarDollarExpand(), which deals with chained ads.
Developer time: 1-2 days to deal with tricky callsites