From 630e1d8c8b8652406e453309ba8d01fce3e3e72f Mon Sep 17 00:00:00 2001
From: puech
Date: Fri, 29 Jul 2011 14:25:34 +0000
Subject: Cases: generic equality on constr replaced by destructors

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@14327 85f007b7-540e-0410-9357-904b9bb8a0f7
---
 pretyping/cases.ml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pretyping/cases.ml b/pretyping/cases.ml
index 331cd01231..304ffc7662 100644
--- a/pretyping/cases.ml
+++ b/pretyping/cases.ml
@@ -595,7 +595,7 @@ let regeneralize_index_tomatch n =
   genrec 0
 
 let rec replace_term n c k t =
-  if t = mkRel (n+k) then lift k c
+  if isRel t && destRel t = n+k then lift k c
   else map_constr_with_binders succ (replace_term n c) k t
 
 let length_of_tomatch_type_sign (dep,_) = function
-- 
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