X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Ftactics%2FnegationTactics.ml;h=287ec4dfe4ae2e68271865b607e2456afb282200;hb=34fc94bfcd6172a4f856638213e3d50dc81444ca;hp=e77fdf4de30269800c4ccf36b084ee2792fcdb30;hpb=61a2faa2694907757dd617175e0144705e79d65a;p=helm.git

diff --git a/helm/software/components/tactics/negationTactics.ml b/helm/software/components/tactics/negationTactics.ml
index e77fdf4de..287ec4dfe 100644
--- a/helm/software/components/tactics/negationTactics.ml
+++ b/helm/software/components/tactics/negationTactics.ml
@@ -31,7 +31,7 @@ let absurd_tac ~term =
   let module C = Cic in
   let module U = UriManager in
   let module P = PrimitiveTactics in
-  let _,metasenv,_,_, _ = proof in
+  let _,metasenv,_subst,_,_, _ = proof in
   let _,context,ty = CicUtil.lookup_meta goal metasenv in
   let absurd_URI =
    match LibraryObjects.absurd_URI () with
@@ -39,7 +39,7 @@ let absurd_tac ~term =
     | None -> raise (ProofEngineTypes.Fail (lazy "You need to register the default \"absurd\" theorem first. Please use the \"default\" command"))
   in
   let ty_term,_ = 
-    CicTypeChecker.type_of_aux' metasenv context term CicUniv.empty_ugraph in
+    CicTypeChecker.type_of_aux' metasenv context term CicUniv.oblivion_ugraph in
     if (ty_term = (C.Sort C.Prop)) (* ma questo controllo serve?? *)
     then ProofEngineTypes.apply_tactic 
       (P.apply_tac