error[E0507]: cannot move out of a shared reference
 --> src/lib.rs:3:18
  |
2 | #[derive(PartialEq)]
  |          --------- in this derive macro expansion
3 | struct Thing(u8, String);
  |                  ^^^^^^ move occurs because value has type `String`, which does not implement the `Copy` trait
  |
  = note: `#[derive(PartialEq)]` triggers a move because taking references to the fields of a packed struct is undefined behaviour
help: consider cloning the value if the performance cost is acceptable
  |
3 | struct Thing(u8, String.clone());
  |                        ++++++++

For more information about this error, try `rustc --explain E0507`.

Don't suggest the clone

Reproducible on the playground with version 1.95.0-nightly (2026-02-24 859951e3c7c9d0322c39)