...

diff --git a/matita/components/ng_kernel/nCicExtraction.ml b/matita/components/ng_kernel/nCicExtraction.ml
index ea38f82dc7dc7a6f104091ce9d59458ddaf8ee90..aa9e7bd8f8589ad70f859de48fd9087da8e701b0 100644 (file)
--- a/matita/components/ng_kernel/nCicExtraction.ml
+++ b/matita/components/ng_kernel/nCicExtraction.ml
@@ -1031,8 +1031,8 @@ let rec pp_obj status (_,ref,obj_kind) =
            let namectx = namectx_of_ctx left in
             pp_ref status ref ^ " :: " ^
              pretty_print_type status namectx tys
-         ) cl
-      )) il)
+         ) cl) ^ "\n    deriving (Prelude.Show)"
+      ) il)
  (* inductive and records missing *)
 
 let rec infos_of (info,_,obj_kind) =