flambda-backend: Test fix in #1457 (#1458)

goldfirere · web-flow · commit 43f02af3050d · 2023-07-26T13:14:05.000+01:00
diff --git a/testsuite/tests/lib-array/iarray_singleton.ml b/testsuite/tests/lib-array/iarray_singleton.ml
@@ -0,0 +1,8 @@
+(* TEST
+   flags = "-extension immutable_arrays"
+   * native
+   *)
+
+(* this failed at one point on flambda2 with -O3:
+   https://github.com/ocaml-flambda/flambda-backend/pull/1457 *)
+let singleton x = [: x :]
