1 files changed, 28 insertions, 0 deletions

diff --git a/src/test/ui/async-await/issues/issue-55809.rs b/src/test/ui/async-await/issues/issue-55809.rs
new file mode 100644
index 000000000..3b271775a
--- /dev/null
+++ b/src/test/ui/async-await/issues/issue-55809.rs
@@ -0,0 +1,28 @@
+// edition:2018
+// run-pass
+
+trait Foo { }
+
+impl Foo for () { }
+
+impl<'a, T> Foo for &'a mut T where T: Foo { }
+
+async fn foo_async<T>(_v: T) -> u8 where T: Foo {
+    0
+}
+
+async fn bad<T>(v: T) -> u8 where T: Foo {
+    foo_async(v).await
+}
+
+async fn async_main() {
+    let mut v = ();
+
+    let _ = bad(&mut v).await;
+    let _ = foo_async(&mut v).await;
+    let _ = bad(v).await;
+}
+
+fn main() {
+    let _ = async_main();
+}