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-rw-r--r--kernel/indtypes.ml5
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/indtypes.ml b/kernel/indtypes.ml
index e3457006d0..5a234d09b9 100644
--- a/kernel/indtypes.ml
+++ b/kernel/indtypes.ml
@@ -291,7 +291,10 @@ let typecheck_inductive env mie =
let defu = Term.univ_of_sort def_level in
let is_natural =
type_in_type env || (check_leq (universes env') infu defu &&
- not (is_type0m_univ defu && not is_unit))
+ not (is_type0m_univ defu && not is_unit)
+ (* (~ is_type0m_univ defu \/ is_unit) (\* infu <= defu && not prop or unital *\) *)
+
+ )
in
let _ =
(** Impredicative sort, always allow *)