File: bug_6529.v

package info (click to toggle)
rocq-stdlib 9.0.0-3
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 11,828 kB
  • sloc: python: 2,928; sh: 444; makefile: 319; javascript: 24; ml: 2
file content (16 lines) | stat: -rw-r--r-- 476 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
From Stdlib Require Import Vector Program.

Program Definition append_nil_def :=
  forall A n (ls: t A n), append ls (nil A) = ls. (* Works *)

Lemma append_nil : append_nil_def. (* Works *)
Proof.
Admitted.

Program Lemma append_nil' :
  forall A n (ls: t A n), append ls (nil A) = ls.
Abort.

Fail Program Lemma append_nil'' :
  forall A B n (ls: t A n), append ls (nil A) = ls.
(* Error: Anomaly "Evar ?X25 was not declared." Please report at http://coq.inria.fr/bugs/. *)