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| author |  Gaetan Gilbert <gaetan.gilbert@ens-lyon.fr> | 2017-04-12 13:29:16 +0200 |
|---|---|---|
| committer | Gaetan Gilbert <gaetan.gilbert@ens-lyon.fr> | 2017-05-03 13:37:56 +0200 |
| commit | 4361c1ed9ac5646055f9f0eecc4a003d720c1994 (patch) | |
| tree | 773a5acaa5099e447eca5a62bd9d3e478a4a8e89 /pretyping/pretyping.ml | |
| parent | e9b745af47ba3386724b874e3fd74b6dad33b015 (diff) | |
Type@{_} should not produce a flexible algebraic universe.
Otherwise [(fun x => x) (Type : Type@{_})] becomes
[(fun x : Type@{i+1} => x) (Type@{i} : Type@{i+1})]
breaking the invariant that terms do not contain algebraic universes
(at the lambda abstraction).
Diffstat (limited to 'pretyping/pretyping.ml')
| -rw-r--r-- | pretyping/pretyping.ml | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/pretyping/pretyping.ml b/pretyping/pretyping.ml index 767e4be35..4886423bd 100644 --- a/pretyping/pretyping.ml +++ b/pretyping/pretyping.ml @@ -229,7 +229,8 @@ let interp_universe ?loc evd = function evd, Univ.Universe.make l | l -> List.fold_left (fun (evd, u) l -> - let evd', l = interp_universe_level_name ~anon_rigidity:univ_flexible_alg evd l in + (* [univ_flexible_alg] can produce algebraic universes in terms *) + let evd', l = interp_universe_level_name ~anon_rigidity:univ_flexible evd l in (evd', Univ.sup u (Univ.Universe.make l))) (evd, Univ.Universe.type0m) l |