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+(************************************************************************)
+(*         *   The Coq Proof Assistant / The Coq Development Team       *)
+(*  v      *   INRIA, CNRS and contributors - Copyright 1999-2018       *)
+(* <O___,, *       (see CREDITS file for the list of authors)           *)
+(*   \VV/  **************************************************************)
+(*    //   *    This file is distributed under the terms of the         *)
+(*         *     GNU Lesser General Public License Version 2.1          *)
+(*         *     (see LICENSE file for the text of the license)         *)
+(************************************************************************)
+
+(* (c) Copyright 2006-2016 Microsoft Corporation and Inria.                  *)
+
+Require Import ssreflect.
+
+
+Variables P G : Prop.
+
+Lemma test1 : (P -> G) -> P -> G.
+Proof.
+move=> pg p.
+have suff {pg} H : P.
+  match goal with |- P -> G => move=> _; exact: pg p | _ => fail end.
+match goal with H : P -> G |- G => exact: H p | _ => fail end.
+Qed.
+
+Lemma test2 : (P -> G) -> P -> G.
+Proof.
+move=> pg p.
+have suffices {pg} H : P.
+  match goal with |- P -> G => move=> _; exact: pg p | _ => fail end.
+match goal with H : P -> G |- G => exact: H p | _ => fail end.
+Qed.
+
+Lemma test3 : (P -> G) -> P -> G.
+Proof.
+move=> pg p.
+suff have {pg} H : P.
+  match goal with H : P |- G => exact: pg H | _ => fail end.
+match goal with |- (P -> G) -> G => move=> H; exact: H p | _ => fail end.
+Qed.
+
+Lemma test4 : (P -> G) -> P -> G.
+Proof.
+move=> pg p.
+suffices have {pg} H: P.
+  match goal with H : P |- G => exact: pg H | _ => fail end.
+match goal with |- (P -> G) -> G => move=> H; exact: H p | _ => fail end.
+Qed.
+
+(*
+Lemma test5 : (P -> G) -> P -> G.
+Proof.
+move=> pg p.
+suff have {pg} H : P := pg H.
+match goal with |- (P -> G) -> G => move=> H; exact: H p | _ => fail end.
+Qed.
+*)
+
+(*
+Lemma test6 : (P -> G) -> P -> G.
+Proof.
+move=> pg p.
+suff have {pg} H := pg H.
+match goal with |- (P -> G) -> G => move=> H; exact: H p | _ => fail end.
+Qed.
+*)
+
+Lemma test7 : (P -> G) -> P -> G.
+Proof.
+move=> pg p.
+have suff {pg} H : P := pg.
+match goal with H : P -> G |- G => exact: H p | _ => fail end.
+Qed.
+
+Lemma test8 : (P -> G) -> P -> G.
+Proof.
+move=> pg p.
+have suff {pg} H := pg.
+match goal with H : P -> G |- G => exact: H p | _ => fail end.
+Qed.
+
+Goal forall x y : bool, x = y -> x = y.
+move=> x y E.
+by have {x E} -> : x = y by [].
+Qed.