lint: ignored #[track_caller] on trait define

[A4-Tacks]

Code

pub trait Foo {
    #[track_caller]
    fn foo(&self);
}

Current output

empty

Desired output

warning: `#[track_caller]` is ignored on function prototypes
    --> src/main.rs:2:5
     |
2    |     #[track_caller]
     |     ^^^^^^^^^^^^^^^
     |
     = note: `#[warn(unused_attributes)]` on by default

Rationale and extra context

No response

Other cases

Rust Version

rustc 1.88.0-nightly (a15cce269 2025-04-17)
binary: rustc
commit-hash: a15cce2690e8fab72422515c9dc02c6fbc506733
commit-date: 2025-04-17
host: aarch64-unknown-linux-gnu
release: 1.88.0-nightly
LLVM version: 20.1.2

Anything else?

No response

[fmease]

Could you clarify what makes you believe that it's ignored? From my quick experiments on the playground it seems to get applied. E.g., consider:

trait Trait {
    //#[track_caller]
    fn f();
}

impl Trait for () { fn f() { panic!(); } }

fn main() { <() as Trait>::f(); }

Without #[track_caller], we'll get thread 'main' panicked at src/main.rs:6:30: (i.e., inside f's body).
With #[track_caller] however, we'll correctly get thread 'main' panicked at src/main.rs:8:13: (i.e., inside main).

Do you have a more complex example where it breaks down? If so, could you please provide enough code to reproduce it? Thanks!

[A4-Tacks]

Sorry, maybe I made a mistake

[fmease]

No worries!