X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2FmatitaExcPp.ml;h=169800e5997fd6ee92e46e7f64bc77906090140c;hb=245ff83b44c373455592e2e2271a2a7a79610799;hp=5b9cb434740e3cc194150c7717c0dc00d770ad98;hpb=1319bb002c3092e803477f6f7f6f0fa73c2fd6fb;p=helm.git

diff --git a/matita/matita/matitaExcPp.ml b/matita/matita/matitaExcPp.ml
index 5b9cb4347..169800e59 100644
--- a/matita/matita/matitaExcPp.ml
+++ b/matita/matita/matitaExcPp.ml
@@ -106,14 +106,15 @@ let compact_disambiguation_errors all_passes errorll =
       filter choices
    in
     filter_phase_3
-     (List.map (fun o,l -> o,List.sort choices_compare_by_passes l)
+     (List.map (fun (o,l) -> o,List.sort choices_compare_by_passes l)
        (uniq (List.stable_sort choices_compare choices)))
   in
    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 ->
@@ -152,8 +155,7 @@ let rec to_string =
   | MatitaEngine.TryingToAdd msg ->
      None, "Attempt to insert an alias in batch mode: " ^ Lazy.force msg
   | MatitaEngine.AlreadyLoaded msg ->
-     None, "The file " ^ Lazy.force msg ^ " needs recompilation but it is
-     already loaded; undo the inclusion and try again."
+     None, "The file " ^ Lazy.force msg ^ " needs recompilation but it is already loaded; undo the inclusion and try again."
   | MatitaEngine.FailureCompiling (filename,exn) ->
      None, "Compiling " ^ filename ^ ":\n" ^ snd (to_string exn)
   | NCicRefiner.AssertFailure msg ->
@@ -236,5 +238,7 @@ let rec to_string =
       loc,
        "********** DISAMBIGUATION ERRORS: **********\n" ^
         explain (aux errorll)
-  | exn -> None, ("Uncaught exception: " ^ Printexc.to_string exn ^ Printexc.get_backtrace ())
-
+  | 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))