From cc68954e80969fbc73b60c1ce6e4ad4ed553ccd7 Mon Sep 17 00:00:00 2001
From: barras
Date: Mon, 19 Jun 2006 18:54:49 +0000
Subject: bug serieux efficacite de ltac

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@8963 85f007b7-540e-0410-9357-904b9bb8a0f7
---
 pretyping/pattern.ml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'pretyping/pattern.ml')

diff --git a/pretyping/pattern.ml b/pretyping/pattern.ml
index 1453aa218b..979ecb0b17 100644
--- a/pretyping/pattern.ml
+++ b/pretyping/pattern.ml
@@ -132,7 +132,7 @@ let map_pattern_with_binders g f l = function
 let map_pattern f = map_pattern_with_binders (fun () -> ()) (fun () -> f) ()
 
 let rec instantiate_pattern lvar = function
-  | PVar id as x -> (try List.assoc id lvar with Not_found -> x)
+  | PVar id as x -> (try Lazy.force(List.assoc id lvar) with Not_found -> x)
   | (PFix _ | PCoFix _) -> error ("Not instantiable pattern")
   | c -> map_pattern (instantiate_pattern lvar) c
 
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