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 16:53:30 +0100 |
commit | a4c7f8bd98be2a200489325ff7c5061cf80ab4f3 (patch) | |
tree | 26dd9c4aa142597ee09c887ef161d5f0fa5077b6 /test-suite/bugs/opened/4717.v | |
parent | 164c6861860e6b52818c031f901ffeff91fca16a (diff) |
Imported Upstream version 8.6upstream/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.*) |