X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fcic_proof_checking%2FfreshNamesGenerator.ml;h=1edb35b0420656b16f728623aadfd9f4d7e29098;hb=d2ad19f46b30ed0f873635289d89bfe46e04ffb6;hp=99c9e4d76c9d93f51e070fce5aca31487c6099af;hpb=55b82bd235d82ff7f0a40d980effe1efde1f5073;p=helm.git

diff --git a/helm/software/components/cic_proof_checking/freshNamesGenerator.ml b/helm/software/components/cic_proof_checking/freshNamesGenerator.ml
index 99c9e4d76..1edb35b04 100755
--- a/helm/software/components/cic_proof_checking/freshNamesGenerator.ml
+++ b/helm/software/components/cic_proof_checking/freshNamesGenerator.ml
@@ -60,8 +60,10 @@ let rec guess_a_name context ty =
   | Cic.Implicit _ -> assert false
   | Cic.Cast (t1,t2) -> guess_a_name context t1
   | Cic.Prod (na_,_,t) -> higher_name 1 t
-  | Cic.Lambda _ -> assert false                   
-  | Cic.LetIn (_,s,t) -> guess_a_name context (CicSubstitution.subst s t)
+(* warning: on appl we should beta reduce before the recursive call
+  | Cic.Lambda _ -> assert false   
+*)
+  | Cic.LetIn (_,s,t) -> guess_a_name context (CicSubstitution.subst ~avoid_beta_redexes:true s t)
   | Cic.Appl [] -> assert false
   | Cic.Appl (he::_) -> guess_a_name context he 
   | Cic.Const (uri,_)