1 files changed, 16 insertions, 0 deletions
diff --git a/tests/ui/async-await/future-sizes/future-as-arg.rs b/tests/ui/async-await/future-sizes/future-as-arg.rs
new file mode 100644
index 000000000..93c69b052
--- /dev/null
+++ b/tests/ui/async-await/future-sizes/future-as-arg.rs
@@ -0,0 +1,16 @@
+// edition: 2021
+// run-pass
+
+async fn test(_arg: [u8; 16]) {}
+
+async fn use_future(fut: impl std::future::Future<Output = ()>) {
+    fut.await
+}
+
+fn main() {
+    let actual = std::mem::size_of_val(
+        &use_future(use_future(use_future(use_future(use_future(test([0; 16])))))));
+    // Not using an exact number in case it slightly changes over different commits
+    let expected = 550;
+    assert!(actual > expected, "expected: >{expected}, actual: {actual}");
+}