blob: 2162901231938057c1f2d6be82ff17722879922b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
Set Universe Polymorphism.
Module Segfault.
Inductive decision_tree : Type := .
Fixpoint first_satisfying_helper {A B} (f : A -> option B) (ls : list A) : option B
:= match ls with
| nil => None
| cons x xs
=> match f x with
| Some v => Some v
| None => first_satisfying_helper f xs
end
end.
Axiom admit : forall {T}, T.
Definition dtree4 : option decision_tree :=
match first_satisfying_helper (fun pat : nat => Some pat) (cons 0 nil)
with
| Some _ => admit
| None => admit
end
.
Definition dtree'' := Eval vm_compute in dtree4. (* segfault *)
End Segfault.
Module OtherExample.
Definition bar@{i} := Type@{i}.
Definition foo@{i j} (x y z : nat) :=
@id Type@{j} bar@{i}.
Eval vm_compute in foo.
End OtherExample.
Module LocalClosure.
Definition bar@{i} := Type@{i}.
Definition foo@{i j} (x y z : nat) :=
@id (nat -> Type@{j}) (fun _ => Type@{i}).
Eval vm_compute in foo.
End LocalClosure.
Require Import Hurkens.
Polymorphic Inductive unit := tt.
Polymorphic Definition foo :=
let x := id tt in (x, x, Type).
Lemma bad : False.
refine (TypeNeqSmallType.paradox (snd foo) _).
vm_compute.
Fail reflexivity.
Abort.
|
