From 9043add656177eeac1491a73d2f3ab92bec0013c Mon Sep 17 00:00:00 2001 From: Benjamin Barenblat Date: Sat, 29 Dec 2018 14:31:27 -0500 Subject: Imported Upstream version 8.8.2 --- test-suite/bugs/closed/1859.v | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 test-suite/bugs/closed/1859.v (limited to 'test-suite/bugs/closed/1859.v') diff --git a/test-suite/bugs/closed/1859.v b/test-suite/bugs/closed/1859.v new file mode 100644 index 00000000..43acfe4b --- /dev/null +++ b/test-suite/bugs/closed/1859.v @@ -0,0 +1,20 @@ +Require Import Ring. +Require Import ArithRing. + +Ltac ring_simplify_neq := + match goal with + | [ H: ?X <> ?Y |- _ ] => progress ring_simplify X Y in H + end. + +Lemma toto : forall x y, x*1 <> y*1 -> y*1 <> x*1 -> x<>y. +Proof. + intros. + ring_simplify_neq. + ring_simplify_neq. + (* make sure ring_simplify has simplified both hypotheses *) + match goal with + | [ H: context[_*1] |- _ ] => fail 1 + | _ => idtac + end. + auto. +Qed. -- cgit v1.2.3