error: lifetime may not live long enough
  --> $DIR/issue-74497-lifetime-in-opaque.rs:18:21
   |
LL |     let _ = foo(|x| bar(x));
   |                  -- ^^^^^^ returning this value requires that `'1` must outlive `'2`
   |                  ||
   |                  |return type of closure `impl Future<Output = ()>` contains a lifetime `'2`
   |                  has type `&'1 u8`

error: aborting due to previous error