diff options
| author |  Pierre-Marie Pédrot <pierre-marie.pedrot@inria.fr> | 2018-06-21 10:36:17 +0200 |
|---|---|---|
| committer | Pierre-Marie Pédrot <pierre-marie.pedrot@inria.fr> | 2018-06-21 10:38:09 +0200 |
| commit | b098de535db3a17777fb77733229bbbfb914511f (patch) | |
| tree | 666b53186a7bcdd31f346eb13cff210e2596b1d4 | |
| parent | 3d4899f841adc7cb0c1cec7c49ae3366dda3b217 (diff) | |
Fix #5719: Uncaught exception Invalid_argument.
It seems that lifting a term with a negative index is not equivalent to
strengthening it by applying to a dummy substitution. This looks suspicious
at best.
| -rw-r--r-- | pretyping/cases.ml | 3 | ||||
| -rw-r--r-- | test-suite/bugs/closed/5719.v | 9 |
2 files changed, 11 insertions, 1 deletions
diff --git a/pretyping/cases.ml b/pretyping/cases.ml index 93ca9dc5e..2d72b9db6 100644 --- a/pretyping/cases.ml +++ b/pretyping/cases.ml @@ -1699,7 +1699,8 @@ let abstract_tycon ?loc env evdref subst tycon extenv t = let ty = get_type_of env !evdref t in Evarutil.evd_comb1 (refresh_universes (Some false) env) evdref ty in - let ty = lift (-k) (aux x ty) in + let dummy_subst = List.init k (fun _ -> mkProp) in + let ty = substl dummy_subst (aux x ty) in let depvl = free_rels !evdref ty in let inst = List.map_i diff --git a/test-suite/bugs/closed/5719.v b/test-suite/bugs/closed/5719.v new file mode 100644 index 000000000..0fad5f54e --- /dev/null +++ b/test-suite/bugs/closed/5719.v @@ -0,0 +1,9 @@ +Axiom cons_data_one : + forall (Aone : unit -> Set) (i : unit) (a : Aone i), nat. +Axiom P : nat -> Prop. +Axiom children_data_rect3 : forall {Aone : unit -> Set} + (cons_one_case : forall (i : unit) (b : Aone i), + nat -> nat -> P (cons_data_one Aone i b)), + P 0. +Fail Definition decide_children_equality IH := children_data_rect3 + (fun _ '(existT _ _ _) => match IH with tt => _ end). |