Fix comparison of extracted array literals

Fixes #13453 which was a loop in
~~~ocaml
let normalize a =
  let o = optims () in
  let rec norm a =
    let a' = if o.opt_kill_dum then kill_dummy (simpl o a) else simpl o a in
    if eq_ml_ast a a' then a else norm a'
  in norm a
~~~
the `eq_ml_ast` was always returning `false`.

1 files changed, 6 insertions, 0 deletions

diff --git a/test-suite/bugs/closed/bug_13453.v b/test-suite/bugs/closed/bug_13453.v
new file mode 100644
index 0000000000..4d0e435df7
--- /dev/null
+++ b/test-suite/bugs/closed/bug_13453.v
@@ -0,0 +1,6 @@
+Require Extraction.
+
+Primitive array := #array_type.
+
+Definition a : array nat := [| 0%nat | 0%nat |].
+Extraction a.