1 error[E0477]: the type `&mut ()` does not fulfill the required lifetime
2 --> $DIR/issue-90014.rs:14:20
4 LL | type Fut<'a> = impl Future<Output = ()>;
5 | ^^^^^^^^^^^^^^^^^^^^^^^^
7 note: type must outlive the lifetime `'a` as defined here
8 --> $DIR/issue-90014.rs:14:14
10 LL | type Fut<'a> = impl Future<Output = ()>;
13 error: aborting due to previous error
15 For more information about this error, try `rustc --explain E0477`.