https://github.com/coq/coq/pull/19040 changes the way error locations are reported in the XML protocol. Specifically, it replaces the loc_s and loc_e attributes of the fail result with an optional Loc.t field. If I understand correctly, the start and stop fields contain the same byte offsets as the old loc_s and loc_e, so it's enough to just extract and return those.
https://github.com/coq/coq/pull/19040 changes the way error locations are reported in the XML protocol. Specifically, it replaces the
loc_sandloc_eattributes of thefailresult with an optionalLoc.tfield. If I understand correctly, thestartandstopfields contain the same byte offsets as the oldloc_sandloc_e, so it's enough to just extract and return those.