X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Ftactics%2FproofEngineTypes.ml;h=58dafd1a674441e25a8a933dc82a031fef1a5fea;hb=4167cea65ca58897d1a3dbb81ff95de5074700cc;hp=ed4a491e1d98d2ed14c55e1a585365e56c0d2f18;hpb=c334523c4ff9b584ac108097fa6430e29f935e8f;p=helm.git

diff --git a/helm/ocaml/tactics/proofEngineTypes.ml b/helm/ocaml/tactics/proofEngineTypes.ml
index ed4a491e1..58dafd1a6 100644
--- a/helm/ocaml/tactics/proofEngineTypes.ml
+++ b/helm/ocaml/tactics/proofEngineTypes.ml
@@ -83,7 +83,7 @@ let conclusion_pattern t =
   t',[],Cic.Implicit (Some `Hole)
 
   (** tactic failure *)
-exception Fail of string
+exception Fail of string Lazy.t
 
   (** 
     calls the opaque tactic on the status, restoring the original