Tracklist linenumber

Anyone know how create a tracklist column that shows a linenumber? Thanks.

(%_counter% used to (mostly) work, but I guess that was Undefined Behaviour, since that's undocumented and fails in the current dev build.)

Please? I really need this for navigating long lists. Thanks.

It's currently not possible.

OK, thanks. May I suggest %_listindex% be added for this?