X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Ftactics%2FproofEngineTypes.mli;h=40a9e6c80067ffd81d34cdb4c8a771d89eacd8f8;hb=4167cea65ca58897d1a3dbb81ff95de5074700cc;hp=f45d681c198b216cf65564f95368b81597d70c48;hpb=c334523c4ff9b584ac108097fa6430e29f935e8f;p=helm.git

diff --git a/helm/ocaml/tactics/proofEngineTypes.mli b/helm/ocaml/tactics/proofEngineTypes.mli
index f45d681c1..40a9e6c80 100644
--- a/helm/ocaml/tactics/proofEngineTypes.mli
+++ b/helm/ocaml/tactics/proofEngineTypes.mli
@@ -65,7 +65,7 @@ type pattern = lazy_term option * (string * Cic.term) list * Cic.term
 val conclusion_pattern : Cic.term option -> pattern
 
   (** tactic failure *)
-exception Fail of string
+exception Fail of string Lazy.t
 
 val apply_tactic: tactic -> status ->  proof * goal list