diff options
Diffstat (limited to 'plugins/firstorder')
| -rw-r--r-- | plugins/firstorder/unify.ml | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/plugins/firstorder/unify.ml b/plugins/firstorder/unify.ml index f823cfa553..93f84687ed 100644 --- a/plugins/firstorder/unify.ml +++ b/plugins/firstorder/unify.ml @@ -46,12 +46,12 @@ let unif t1 t2= else bind i nt2 | Meta i,_ -> let t=subst_meta !sigma nt2 in - if Intset.is_empty (free_rels t) && + if Int.Set.is_empty (free_rels t) && not (occur_term (mkMeta i) t) then bind i t else raise (UFAIL(nt1,nt2)) | _,Meta i -> let t=subst_meta !sigma nt1 in - if Intset.is_empty (free_rels t) && + if Int.Set.is_empty (free_rels t) && not (occur_term (mkMeta i) t) then bind i t else raise (UFAIL(nt1,nt2)) | Cast(_,_,_),_->Queue.add (strip_outer_cast nt1,nt2) bige |