1 files changed, 48 insertions, 0 deletions
diff --git a/src/test/ui/suggestions/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.stderr b/src/test/ui/suggestions/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.stderr
new file mode 100644
index 000000000..c7d420e0a
--- /dev/null
+++ b/src/test/ui/suggestions/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.stderr
@@ -0,0 +1,48 @@
+error[E0277]: `fn() -> impl Future<Output = ()> {foo}` is not a future
+  --> $DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:10:9
+   |
+LL | async fn foo() {}
+   |          --- consider calling this function
+...
+LL |     bar(foo);
+   |     --- ^^^ `fn() -> impl Future<Output = ()> {foo}` is not a future
+   |     |
+   |     required by a bound introduced by this call
+   |
+   = help: the trait `Future` is not implemented for `fn() -> impl Future<Output = ()> {foo}`
+   = note: fn() -> impl Future<Output = ()> {foo} must be a future or must implement `IntoFuture` to be awaited
+note: required by a bound in `bar`
+  --> $DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:7:16
+   |
+LL | fn bar(f: impl Future<Output=()>) {}
+   |                ^^^^^^^^^^^^^^^^^ required by this bound in `bar`
+help: use parentheses to call the function
+   |
+LL |     bar(foo());
+   |            ++
+
+error[E0277]: `[closure@$DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:11:25: 11:33]` is not a future
+  --> $DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:12:9
+   |
+LL |     let async_closure = async || ();
+   |                         -------- consider calling this closure
+LL |     bar(async_closure);
+   |     --- ^^^^^^^^^^^^^ `[closure@$DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:11:25: 11:33]` is not a future
+   |     |
+   |     required by a bound introduced by this call
+   |
+   = help: the trait `Future` is not implemented for `[closure@$DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:11:25: 11:33]`
+   = note: [closure@$DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:11:25: 11:33] must be a future or must implement `IntoFuture` to be awaited
+note: required by a bound in `bar`
+  --> $DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:7:16
+   |
+LL | fn bar(f: impl Future<Output=()>) {}
+   |                ^^^^^^^^^^^^^^^^^ required by this bound in `bar`
+help: use parentheses to call the closure
+   |
+LL |     bar(async_closure());
+   |                      ++
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0277`.