better exception handling

[helm.git] / helm / software / matita / matitaExcPp.ml

diff --git a/helm/software/matita/matitaExcPp.ml b/helm/software/matita/matitaExcPp.ml
index a2da0c3e0d99eedeef5cd2c0d4afc07df83e9304..126b78b89fc6702d08eff63a14a1708d172c64d9 100644 (file)
--- a/helm/software/matita/matitaExcPp.ml
+++ b/helm/software/matita/matitaExcPp.ml
@@ -169,8 +169,10 @@ let rec to_string =
      None, ("Disambiguation choice not found: " ^ Lazy.force msg)
   | MatitaEngine.EnrichedWithStatus (exn,_) ->
      None, "EnrichedWithStatus "^snd(to_string exn)
-  | NTacStatus.Error msg ->
-     None, "NTactic error: " ^ Lazy.force msg
+  | NTacStatus.Error (msg,None) ->
+     None, "NTactic error: " ^ Lazy.force msg 
+  | NTacStatus.Error (msg,Some exn) ->
+     None, "NTactic error: " ^ Lazy.force msg ^ "\n" ^ snd(to_string exn)
   | MultiPassDisambiguator.DisambiguationError (offset,errorll) ->
      let loc =
       match errorll with