according to camlp5 sources, the dummy loc should be 0,0 and not -1,-1

diff --git a/helm/software/components/extlib/hExtlib.ml b/helm/software/components/extlib/hExtlib.ml
index 361587b7d33402f4d3989ffde01d72538a88deb6..3fe5c0a7d40762ba0340a82ddad0dc685ee1c44c 100644 (file)
--- a/helm/software/components/extlib/hExtlib.ml
+++ b/helm/software/components/extlib/hExtlib.ml
@@ -464,7 +464,7 @@ let loc_of_floc floc = Stdpp.first_pos floc, Stdpp.last_pos floc;;
 let floc_of_loc (loc_begin, loc_end) =
  Stdpp.make_loc (loc_begin, loc_end)
 
-let dummy_floc = floc_of_loc (-1, -1)
+let dummy_floc = floc_of_loc (0, 0)
 
 let raise_localized_exception ~offset floc exn =
  let x, y = loc_of_floc floc in