Fixing complexity issue with f_equal. Thanks to J.-H. Jourdan

for reporting it.

A "cut" was not appropriately chained on the second goal but on both
goals, with the chaining on the first goal introducing noise.

1 files changed, 14 insertions, 0 deletions

diff --git a/test-suite/complexity/f_equal.v b/test-suite/complexity/f_equal.v
new file mode 100644
index 000000000..30e87939e
--- /dev/null
+++ b/test-suite/complexity/f_equal.v
@@ -0,0 +1,14 @@
+(* Checks that f_equal does not reduce the term uselessly *)
+(* Expected time < 1.00s *)
+
+Fixpoint stupid (n : nat) : unit :=
+match n with
+| 0 => tt
+| S n =>
+  let () := stupid n in
+  let () := stupid n in
+  tt
+end.
+
+Goal stupid 23 = stupid 23.
+f_equal.