Improved error messages.

diff --git a/helm/ocaml/cic_unification/cicRefine.ml b/helm/ocaml/cic_unification/cicRefine.ml
index b64d8f4bb8b2236793b5be72d911e038e946b227..77b376d63e1615931f3de6e92d9b93f867f7cc3b 100644 (file)
--- a/helm/ocaml/cic_unification/cicRefine.ml
+++ b/helm/ocaml/cic_unification/cicRefine.ml
@@ -419,7 +419,7 @@ and type_of_aux' metasenv context t =
          | Some t,Some (_,C.Def (ct,_)) ->
             (try
               CicUnification.fo_unif_subst subst context metasenv t ct
-             with _ -> raise (NotRefinable (sprintf "The local context is not consistent with the canonical context, since %s cannot be unified with %s" (CicMetaSubst.ppterm subst t) (CicMetaSubst.ppterm subst ct))))
+             with e -> raise (NotRefinable (sprintf "The local context is not consistent with the canonical context, since %s cannot be unified with %s. Reason: %s" (CicMetaSubst.ppterm subst t) (CicMetaSubst.ppterm subst ct) (match e with CicUnification.AssertFailure msg -> msg | _ -> (Printexc.to_string e)))))
          | Some t,Some (_,C.Decl ct) ->
             let inferredty,subst',metasenv' =
              type_of_aux subst metasenv context t
@@ -427,7 +427,7 @@ and type_of_aux' metasenv context t =
              (try
                CicUnification.fo_unif_subst
                 subst' context metasenv' inferredty ct
-             with _ -> raise (NotRefinable (sprintf "The local context is not consistent with the canonical context, since the type %s of %s cannot be unified with the expected type %s" (CicMetaSubst.ppterm subst' inferredty) (CicMetaSubst.ppterm subst' t) (CicMetaSubst.ppterm subst' ct))))
+             with e -> raise (NotRefinable (sprintf "The local context is not consistent with the canonical context, since the type %s of %s cannot be unified with the expected type %s. Reason: %s" (CicMetaSubst.ppterm subst' inferredty) (CicMetaSubst.ppterm subst' t) (CicMetaSubst.ppterm subst' ct) (match e with CicUnification.AssertFailure msg -> msg | _ -> (Printexc.to_string e)))))
          | None, Some _  ->
              raise (NotRefinable (sprintf
               "Not well typed metavariable instance %s: the local context does not instantiate an hypothesis even if the hypothesis is not restricted in the canonical context %s"