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-rw-r--r--pretyping/typeclasses.ml3
1 files changed, 2 insertions, 1 deletions
diff --git a/pretyping/typeclasses.ml b/pretyping/typeclasses.ml
index 1b8c5a2331..96e36b70ba 100644
--- a/pretyping/typeclasses.ml
+++ b/pretyping/typeclasses.ml
@@ -139,12 +139,13 @@ let discharge_class (_,cl) =
(decl :: ctx', n :: subst)
) ctx ([], []) in
let discharge_rel_context subst n rel =
+ let rel = map_rel_context (Cooking.expmod_constr repl) rel in
let ctx, _ =
List.fold_right
(fun (id, b, t) (ctx, k) ->
(id, Option.smartmap (substn_vars k subst) b, substn_vars k subst t) :: ctx, succ k)
rel ([], n)
- in map_rel_context (Cooking.expmod_constr repl) ctx
+ in ctx
in
let abs_context cl =
match cl.cl_impl with