1 files changed, 12 insertions, 0 deletions
diff --git a/tests/ui/async-await/async-closures/is-not-fn.rs b/tests/ui/async-await/async-closures/is-not-fn.rs
new file mode 100644
index 00000000000..94c8e8563bd
--- /dev/null
+++ b/tests/ui/async-await/async-closures/is-not-fn.rs
@@ -0,0 +1,12 @@
+// edition:2021
+
+#![feature(async_closure)]
+
+fn main() {
+    fn needs_fn(x: impl FnOnce()) {}
+    needs_fn(async || {});
+    //~^ ERROR expected a `FnOnce()` closure, found `{coroutine-closure@
+    // FIXME(async_closures): This should explain in more detail how async fns don't
+    // implement the regular `Fn` traits. Or maybe we should just fix it and make them
+    // when there are no upvars or whatever.
+}