1 warning: derive helper attribute is used before it is introduced
2 --> $DIR/issue-75930-derive-cfg.rs:19:3
4 LL | #[print_helper(a)]
8 | ----- the attribute is introduced here
10 = note: `#[warn(legacy_derive_helpers)]` on by default
11 = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
12 = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
14 warning: 1 warning emitted