X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2FmatitaExcPp.ml;h=b0a5c7f12cbf91acb1e251c76d039cf564cf9309;hb=21de0d35017656c5a55528390b54b0b2ae395b44;hp=5134f403964195b9739ba6d22b4afa42dee1188f;hpb=f4665bcba9c87ecced8746f08da717c767b1a839;p=helm.git

diff --git a/matita/matita/matitaExcPp.ml b/matita/matita/matitaExcPp.ml
index 5134f4039..b0a5c7f12 100644
--- a/matita/matita/matitaExcPp.ml
+++ b/matita/matita/matitaExcPp.ml
@@ -112,8 +112,9 @@ let compact_disambiguation_errors all_passes errorll =
    choices
 ;;
 
-let rec to_string = 
-  function
+let rec to_string exn =
+ try
+  (match exn with
     HExtlib.Localized (floc,exn) ->
       let _,msg = to_string exn in
       let (x, y) = HExtlib.loc_of_floc floc in
@@ -123,7 +124,7 @@ let rec to_string =
   | GrafiteTypes.Command_error msg -> None, "Error: " ^ msg
   | CicNotationParser.Parse_error err ->
       None, sprintf "Parse error: %s" err
-  | Unix.Unix_error (code, api, param) ->
+  | Unix.Unix_error (code, api, _param) ->
       let err = Unix.error_message code in
       None, "Unix Error (" ^ api ^ "): " ^ err
   | HMarshal.Corrupt_file fname -> None, sprintf "file '%s' is corrupt" fname
@@ -139,6 +140,8 @@ let rec to_string =
      None, "NRefiner uncertain: " ^ snd (Lazy.force msg)
   | NCicMetaSubst.Uncertain msg ->
      None, "NCicMetaSubst uncertain: " ^ Lazy.force msg
+  | NCicMetaSubst.MetaSubstFailure msg ->
+     None, "NCicMetaSubst failure: " ^ Lazy.force msg
   | NCicTypeChecker.TypeCheckerFailure msg ->
      None, "NTypeChecker failure: " ^ Lazy.force msg
   | NCicTypeChecker.AssertFailure msg ->
@@ -236,5 +239,7 @@ let rec to_string =
       loc,
        "********** DISAMBIGUATION ERRORS: **********\n" ^
         explain (aux errorll)
-  | exn -> None, "Uncaught exception: " ^ Printexc.to_string exn
-
+  | exn -> None, ("Uncaught exception: " ^ Printexc.to_string exn ^ Printexc.get_backtrace ()))
+ with exn ->
+  None, ("Exception raised during pretty-printing of an exception: " ^
+   snd (to_string exn))