[bug] `#[warn(unused_result)]` gives syntactically incorrect code suggestion.

Code

type Result<T> = std::result::Result<T, ()>;

macro_rules! bad_suggestion {
    () => {{ bs_2!() }};
}

#[macro_export]
macro_rules! bs_2 {
    () => {
        Result::<()>::Ok(())
    };
}

fn main() -> Result<()> {
    bad_suggestion!();
    Ok(())
}

Current output

warning: unused `std::result::Result` that must be used
  --> src/main.rs:15:5
   |
15 |     bad_suggestion!();
   |     ^^^^^^^^^^^^^^^^^
   |
   = note: this `Result` may be an `Err` variant, which should be handled
   = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
help: use `let _ = ...` to ignore the resulting value
   |
15 |     let _ = bad_suggestion!();;
   |     +++++++                  +

Desired output

warning: unused `std::result::Result` that must be used
  --> src/main.rs:15:5
   |
15 |     bad_suggestion!();
   |     ^^^^^^^^^^^^^^^^^
   |
   = note: this `Result` may be an `Err` variant, which should be handled
   = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
help: use `let _ = ...` to ignore the resulting value
   |
15 |     let _ = bad_suggestion!();
   |     +++++++

Rationale and extra context

Nesting macros within each other, when the top-level macro statement block with 2 (or more) balanced pairs of braces gives this output. I found this while using the execute!() macro from crossterm.

Other cases

changing it to the following fixes the issue:
// ----
macro_rules! bad_suggestion {
    () => {
        bs_2!()
    };
}
// ----

Rust Version

rustc 1.93.0 (254b59607 2026-01-19)
binary: rustc
commit-hash: 254b59607d4417e9dffbc307138ae5c86280fe4c
commit-date: 2026-01-19
host: aarch64-apple-darwin
release: 1.93.0
LLVM version: 21.1.8

Anything else?

PFA playground: https://play.rust-lang.org/?version=stable&mode=debug&edition=2024&gist=1be23105720ff4b714e4ab4f0a86c568