False positive for explicit_outlives_requirements lint

[dbeckwith]

#![allow(dead_code)]
#![deny(explicit_outlives_requirements)]

struct Test<'a, T>(&'a T) where T: ?Sized;

(Playground)

Errors:

   Compiling playground v0.0.1 (/playground)
error: outlives requirements can be inferred
 --> src/lib.rs:4:19
  |
4 | struct Test<'a, T>(&'a T) where T: ?Sized;
  |                   ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these bounds
  |
note: lint level defined here
 --> src/lib.rs:2:9
  |
2 | #![deny(explicit_outlives_requirements)]
  |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error

error: Could not compile `playground`.

To learn more, run the command again with --verbose.

Maybe I'm missing something, but this lint error makes no sense in this context, as there are no outlives bounds written.

Curiously, struct Test<'a, T: ?Sized>(&'a T); compiles without error.

[cjgillot]

Fixed since 1.56.0.