Merge PR #12357: [declare] Remove some unused `fix_exn`

Reviewed-by: gares

1 files changed, 54 insertions, 0 deletions

diff --git a/test-suite/interactive/ParalITP_fail_on_qed.v b/test-suite/interactive/ParalITP_fail_on_qed.v
new file mode 100644
index 0000000000..37692ed254
--- /dev/null
+++ b/test-suite/interactive/ParalITP_fail_on_qed.v
@@ -0,0 +1,54 @@
+(* Some boilerplate *)
+Fixpoint fib n := match n with
+  | O => 1
+  | S m => match m with
+    | O => 1
+    | S o => fib o + fib m end end.
+
+Ltac sleep n :=
+  try (cut (fib n = S (fib n)); reflexivity).
+
+(* Tune that depending on your PC *)
+Let time := 10.
+
+
+(* Beginning of demo *)
+
+Section Demo.
+
+Variable i : True.
+
+Lemma a (n : nat) : nat.
+Proof using.
+  revert n.
+  fix f 1.
+  apply f.
+Qed.
+
+Lemma b : True.
+Proof using i.
+  sleep time.
+  idtac.
+  sleep time.
+  (* Here we use "a" *)
+  exact I.
+Qed.
+
+Lemma work_here : True /\ True.
+Proof using i.
+(* Jump directly here, Coq reacts immediately *)
+split.
+  exact b.  (* We can use the lemmas above *)
+exact I.
+Qed.
+
+End Demo.
+
+From Coq Require Import Program.Tactics.
+Obligation Tactic := idtac.
+Program Definition foo : nat -> nat * nat :=
+  fix f (n : nat) := (0,_).
+
+Next Obligation.
+intros f n; apply (f n).
+Qed.