From 36ffad7c7847e28c3275897547a7308929748455 Mon Sep 17 00:00:00 2001
From: Claudio Sacerdoti Coen <claudio.sacerdoticoen@unibo.it>
Date: Wed, 17 Dec 2003 11:49:58 +0000
Subject: [PATCH] Big bug spotted and commented: the delift function considers
the explicit substitution over metavariable occurrences as telescopic.
Instead it is simultaneous.
---
helm/ocaml/cic_unification/cicUnification.ml | 3 +++
1 file changed, 3 insertions(+)
diff --git a/helm/ocaml/cic_unification/cicUnification.ml b/helm/ocaml/cic_unification/cicUnification.ml
index 7221dd0a8..bc736b260 100644
--- a/helm/ocaml/cic_unification/cicUnification.ml
+++ b/helm/ocaml/cic_unification/cicUnification.ml
@@ -91,6 +91,9 @@ let delift context metasenv l t =
in
C.Var (uri,exp_named_subst')
| C.Meta (i, l1) as t ->
+(* CSC: BIG BUG HERE! In the explicit substitution l1 = [t1 ; t2], *)
+(* CSC: it is NOT true that Rel(1) in t2 refers to t1 (i.e. the explicit *)
+(* CSC: substitution is simultaneous, not telescopic. To be fixes ASAP. *)
let rec deliftl j =
function
[] -> []
--
2.39.5