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| author |  Maxime Dénès <mail@maximedenes.fr> | 2016-11-17 10:27:36 +0100 |
|---|---|---|
| committer | Maxime Dénès <mail@maximedenes.fr> | 2016-11-17 10:27:36 +0100 |
| commit | ca9e00ff9b2a8ee17430398a5e0bef2345c39341 (patch) | |
| tree | 1f35be33dcc6ca7117bb85db4415d6f728b80641 /test-suite/bugs/opened/4717.v | |
| parent | 63bb79ab8b488db728e46e5ada38d86d384acff1 (diff) | |
| parent | 633ed9c528c64dc2daa0b3e83749bc392aab7fd2 (diff) | |
Merge commit '633ed9c' into v8.6
Was PR#192: Add test suite files for 4700-4785
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 000000000..9ad474672 --- /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.*) |