1 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/async-await/async-closures/wrong-fn-kind.rs b/tests/ui/async-await/async-closures/wrong-fn-kind.rs
new file mode 100644
index 00000000000..24828832531
--- /dev/null
+++ b/tests/ui/async-await/async-closures/wrong-fn-kind.rs
@@ -0,0 +1,18 @@
+// edition:2021
+
+// FIXME(async_closures): This needs a better error message!
+
+#![feature(async_closure, async_fn_traits)]
+
+use std::ops::AsyncFn;
+
+fn main() {
+    fn needs_async_fn(_: impl AsyncFn()) {}
+
+    let mut x = 1;
+    needs_async_fn(async || {
+        //~^ ERROR i16: ops::async_function::internal_implementation_detail::AsyncFnKindHelper<i8>
+        // FIXME: Should say "closure is AsyncFnMut but it needs AsyncFn" or sth.
+        x += 1;
+    });
+}