diff options
author | Enrico Tassi <gareuselesinge@debian.org> | 2016-12-27 16:53:30 +0100 |
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committer | Enrico Tassi <gareuselesinge@debian.org> | 2016-12-27 18:33:25 +0100 |
commit | 1b92c226e563643da187b8614d5888dc4855eb43 (patch) | |
tree | c4c3d204b36468b58cb71050ba95f06b8dd7bc2e /test-suite/bugs/opened/4717.v | |
parent | 7c9b0a702976078b813e6493c1284af62a3f093c (diff) |
Imported Upstream version 8.6
Diffstat (limited to 'test-suite/bugs/opened/4717.v')
-rw-r--r-- | test-suite/bugs/opened/4717.v | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test-suite/bugs/opened/4717.v b/test-suite/bugs/opened/4717.v new file mode 100644 index 00000000..9ad47467 --- /dev/null +++ b/test-suite/bugs/opened/4717.v @@ -0,0 +1,19 @@ +(*See below. They sometimes work, and sometimes do not. Is this a bug?*) + +Require Import Omega Psatz. + +Definition foo := nat. + +Goal forall (n : foo), 0 = n - n. +Proof. intros. omega. (* works *) Qed. + +Goal forall (x n : foo), x = x + n - n. +Proof. + intros. + Fail omega. (* Omega can't solve this system *) + Fail lia. (* Cannot find witness. *) + unfold foo in *. + omega. (* works *) +Qed. + +(* Guillaume Melquiond: What matters is the equality. In the first case, it is @eq nat. In the second case, it is @eq foo. The same issue exists for ring and field. So it is not a bug, but it is worth fixing.*) |