diff options
Diffstat (limited to 'plugins/firstorder/unify.ml')
| -rw-r--r-- | plugins/firstorder/unify.ml | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/plugins/firstorder/unify.ml b/plugins/firstorder/unify.ml index 24fd8dd88f..a1409edd09 100644 --- a/plugins/firstorder/unify.ml +++ b/plugins/firstorder/unify.ml @@ -1,12 +1,11 @@ (************************************************************************) (* v * The Coq Proof Assistant / The Coq Development Team *) -(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *) +(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2017 *) (* \VV/ **************************************************************) (* // * This file is distributed under the terms of the *) (* * GNU Lesser General Public License Version 2.1 *) (************************************************************************) -open API open Util open Term open EConstr @@ -55,12 +54,12 @@ let unif evd t1 t2= | Meta i,_ -> let t=subst_meta !sigma nt2 in if Int.Set.is_empty (free_rels evd t) && - not (occur_term evd (EConstr.mkMeta i) t) then + not (dependent evd (EConstr.mkMeta i) t) then bind i t else raise (UFAIL(nt1,nt2)) | _,Meta i -> let t=subst_meta !sigma nt1 in if Int.Set.is_empty (free_rels evd t) && - not (occur_term evd (EConstr.mkMeta i) t) then + not (dependent evd (EConstr.mkMeta i) t) then bind i t else raise (UFAIL(nt1,nt2)) | Cast(_,_,_),_->Queue.add (strip_outer_cast evd nt1,nt2) bige | _,Cast(_,_,_)->Queue.add (nt1,strip_outer_cast evd nt2) bige |