From 627a69094f6126aeb1d959b6f610e865ebde8a73 Mon Sep 17 00:00:00 2001
From: herbelin
Date: Sat, 5 Mar 2011 16:42:16 +0000
Subject: Instantiate evar by a lambda when "?n args" has to unify with Prod

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@13880 85f007b7-540e-0410-9357-904b9bb8a0f7
---
 pretyping/evarutil.ml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pretyping/evarutil.ml b/pretyping/evarutil.ml
index 098d0d587a..0da6c39bee 100644
--- a/pretyping/evarutil.ml
+++ b/pretyping/evarutil.ml
@@ -1532,10 +1532,13 @@ let split_tycon loc env evd tycon =
     let t = whd_betadeltaiota env evd c in
       match kind_of_term t with
 	| Prod (na,dom,rng) -> evd, (na, dom, rng)
-	| Evar ev when not (Evd.is_defined_evar evd ev) ->
+	| Evar ev (* ev is undefined because of whd_betadeltaiota *) ->
 	    let (evd',prod) = define_evar_as_product evd ev in
 	    let (_,dom,rng) = destProd prod in
 	      evd',(Anonymous, dom, rng)
+	| App (c,args) when isEvar c ->
+	    let (evd',lam) = define_evar_as_lambda evd (destEvar c) in
+	    real_split evd' (mkApp (lam,args))
 	| _ -> error_not_product_loc loc env evd c
   in
     match tycon with
-- 
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