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(*         *   The Coq Proof Assistant / The Coq Development Team       *)
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(* (c) Copyright 2006-2016 Microsoft Corporation and Inria.                  *)

Require Import ssreflect.
Require Import ssrbool TestSuite.ssr_mini_mathcomp.

Axiom P : forall T, seq T -> Prop.

Goal (forall T (s : seq T), P _ s).
move=> T s.
elim: s => [| x /lastP [| s] IH].
Admitted.

Goal forall x : 'I_1, x = 0 :> nat.
move=> /ord1 -> /=; exact: refl_equal.
Qed.

Goal forall x : 'I_1, x = 0 :> nat.
move=> x.
move=> /ord1 -> in x |- *.
exact: refl_equal.
Qed.