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-rw-r--r--vernac/classes.ml4
1 files changed, 2 insertions, 2 deletions
diff --git a/vernac/classes.ml b/vernac/classes.ml
index a528b96407..ab1892a18e 100644
--- a/vernac/classes.ml
+++ b/vernac/classes.ml
@@ -68,7 +68,7 @@ let _ =
let existing_instance glob g info =
let c = global g in
let info = Option.default Hints.empty_hint_info info in
- let instance = Global.type_of_global_unsafe c in
+ let instance, _ = Global.type_of_global_in_context (Global.env ()) c in
let _, r = decompose_prod_assum instance in
match class_of_constr Evd.empty (EConstr.of_constr r) with
| Some (_, ((tc,u), _)) -> add_instance (new_instance tc info glob
@@ -164,7 +164,7 @@ let new_instance ?(abstract=false) ?(global=false) ?(refine= !refine_instance) p
let ctx'' = ctx' @ ctx in
let (k, u), args = Typeclasses.dest_class_app (push_rel_context ctx'' env) !evars (EConstr.of_constr c) in
let u = EConstr.EInstance.kind !evars u in
- let cl, u = Typeclasses.typeclass_univ_instance (k, u) in
+ let cl = Typeclasses.typeclass_univ_instance (k, u) in
let _, args =
List.fold_right (fun decl (args, args') ->
match decl with