X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fcomponents%2Fng_refiner%2FnCicUnification.ml;h=325ced5c436e9009c5072993ade330af1f0045fa;hb=76a993b80bb33d1075f84c55637ca1897644b16a;hp=b4bc32fe6035dc7bded70504a0826222ca2d63dc;hpb=bf4eb0f3a5b5ff262ad32271a8ba6f171e68c1f0;p=helm.git

diff --git a/matita/components/ng_refiner/nCicUnification.ml b/matita/components/ng_refiner/nCicUnification.ml
index b4bc32fe6..325ced5c4 100644
--- a/matita/components/ng_refiner/nCicUnification.ml
+++ b/matita/components/ng_refiner/nCicUnification.ml
@@ -140,8 +140,10 @@ let rec could_reduce status ~subst context =
   | C.Appl (C.Const (Ref.Ref (_,Ref.Fix (_,recno,_)))::args)
      when List.length args > recno ->
       let t = NCicReduction.whd status ~subst context (List.nth args recno) in
-        could_reduce status subst context t
-  | C.Match (_,_,arg,_) -> could_reduce status ~subst context arg
+        could_reduce status ~subst context t
+  | C.Match (_,_,he,_) ->
+     let he = NCicReduction.whd status ~subst context he in
+      could_reduce status ~subst context he
   | C.Appl (he::_) -> could_reduce status ~subst context he
   | C.Sort _ | C.Rel _ | C.Prod _ | C.Lambda _ | C.Const _ -> false
   | C.Appl [] | C.LetIn _ | C.Implicit _ -> assert false
@@ -412,6 +414,8 @@ and unify_for_delift status metasenv subst context t1 t2 =
    try Some
     (fo_unif_w_hints true status false true(*test_eq_only*) metasenv subst
       context (false,t1) (false,t2))
+    (*(unify status true(*test_eq_only*) metasenv subst
+      context t1 t2 false)*)
    with UnificationFailure _ | Uncertain _ | KeepReducingThis _ -> None
  in
  indent := ind; res