2 files changed, 85 insertions, 0 deletions
diff --git a/src/test/ui/suggestions/issue-96555.rs b/src/test/ui/suggestions/issue-96555.rs
new file mode 100644
index 00000000000..9f0a047c6e9
--- /dev/null
+++ b/src/test/ui/suggestions/issue-96555.rs
@@ -0,0 +1,19 @@
+// edition:2018
+
+async fn f() {
+    m::f1().await; //~ ERROR `()` is not a future
+    m::f2().await; //~ ERROR `()` is not a future
+    m::f3().await; //~ ERROR `()` is not a future
+}
+
+mod m {
+    pub fn f1() {}
+
+    pub(crate) fn f2() {}
+
+    pub
+    fn
+    f3() {}
+}
+
+fn main() {}
diff --git a/src/test/ui/suggestions/issue-96555.stderr b/src/test/ui/suggestions/issue-96555.stderr
new file mode 100644
index 00000000000..6d3b8844d95
--- /dev/null
+++ b/src/test/ui/suggestions/issue-96555.stderr
@@ -0,0 +1,66 @@
+error[E0277]: `()` is not a future
+  --> $DIR/issue-96555.rs:4:12
+   |
+LL |     m::f1().await;
+   |     -------^^^^^^ `()` is not a future
+   |     |
+   |     this call returns `()`
+   |
+   = help: the trait `Future` is not implemented for `()`
+   = note: () must be a future or must implement `IntoFuture` to be awaited
+   = note: required because of the requirements on the impl of `IntoFuture` for `()`
+help: remove the `.await`
+   |
+LL -     m::f1().await;
+LL +     m::f1();
+   | 
+help: alternatively, consider making `fn f1` asynchronous
+   |
+LL |     pub async fn f1() {}
+   |         +++++
+
+error[E0277]: `()` is not a future
+  --> $DIR/issue-96555.rs:5:12
+   |
+LL |     m::f2().await;
+   |     -------^^^^^^ `()` is not a future
+   |     |
+   |     this call returns `()`
+   |
+   = help: the trait `Future` is not implemented for `()`
+   = note: () must be a future or must implement `IntoFuture` to be awaited
+   = note: required because of the requirements on the impl of `IntoFuture` for `()`
+help: remove the `.await`
+   |
+LL -     m::f2().await;
+LL +     m::f2();
+   | 
+help: alternatively, consider making `fn f2` asynchronous
+   |
+LL |     pub(crate) async fn f2() {}
+   |                +++++
+
+error[E0277]: `()` is not a future
+  --> $DIR/issue-96555.rs:6:12
+   |
+LL |     m::f3().await;
+   |     -------^^^^^^ `()` is not a future
+   |     |
+   |     this call returns `()`
+   |
+   = help: the trait `Future` is not implemented for `()`
+   = note: () must be a future or must implement `IntoFuture` to be awaited
+   = note: required because of the requirements on the impl of `IntoFuture` for `()`
+help: remove the `.await`
+   |
+LL -     m::f3().await;
+LL +     m::f3();
+   | 
+help: alternatively, consider making `fn f3` asynchronous
+   |
+LL |     pub async
+   |         +++++
+
+error: aborting due to 3 previous errors
+
+For more information about this error, try `rustc --explain E0277`.