From d55818c7da468ce1c7c9644cb63f68f7561a17bc Mon Sep 17 00:00:00 2001
From: Pierre-Marie Pédrot
Date: Fri, 9 Sep 2016 13:29:28 +0200
Subject: Tracking careless uses of slow name lookup.

---
 engine/termops.ml | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

(limited to 'engine/termops.ml')

diff --git a/engine/termops.ml b/engine/termops.ml
index a047bf53c7..17e56ec31e 100644
--- a/engine/termops.ml
+++ b/engine/termops.ml
@@ -975,11 +975,8 @@ let smash_rel_context sign =
 
 let fold_named_context_both_sides f l ~init = List.fold_right_and_left f l init
 
-let rec mem_named_context id ctxt =
-  match ctxt with
-  | decl :: _ when Id.equal id (NamedDecl.get_id decl) -> true
-  | _ :: sign -> mem_named_context id sign
-  | [] -> false
+let mem_named_context_val id ctxt =
+  try Environ.lookup_named_val id ctxt; true with Not_found -> false
 
 let compact_named_context_reverse sign =
   let compact l decl =
-- 
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