From 32f5e926ed646fcdba6ae45141d2a6d5b3ae738a Mon Sep 17 00:00:00 2001
From: herbelin
Date: Wed, 25 Oct 2006 21:37:37 +0000
Subject: Applatissement des noeuds application vide dans le filtrage Ltac (ex:
 None ne filtrait pas None à cause d'un PApp parasite)

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@9280 85f007b7-540e-0410-9357-904b9bb8a0f7
---
 pretyping/matching.ml     | 2 ++
 test-suite/success/ltac.v | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/pretyping/matching.ml b/pretyping/matching.ml
index 9f580b851d..cac06d2408 100644
--- a/pretyping/matching.ml
+++ b/pretyping/matching.ml
@@ -119,6 +119,8 @@ let matches_core convert allow_partial_app pat c =
 
       | PSort (RType _), Sort (Type _) -> sigma
 
+      | PApp (p, [||]), _ -> sorec stk sigma p t
+
       | PApp (PApp (h, a1), a2), _ ->
           sorec stk sigma (PApp(h,Array.append a1 a2)) t
 
diff --git a/test-suite/success/ltac.v b/test-suite/success/ltac.v
index 9eb5dda721..3f25f70354 100644
--- a/test-suite/success/ltac.v
+++ b/test-suite/success/ltac.v
@@ -168,3 +168,10 @@ Goal forall a b c, a=0 -> b=c+a.
 intros.
 revert a b c H.
 Abort.
+
+(* Used to fail until revision 9280 because of a parasitic App node with
+   empty args *)
+
+Goal True.
+match None with @None => exact I end.
+Abort.
-- 
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