False positive `#[warn(unused_imports)]` warning while glob importing macros defined in nested modules

[datasone]

I tried this code:

mod a {
    mod b {
        macro_rules! macro_b {
            () => {
                "Hello, world!"
            };
        }
        pub(crate) use macro_b;
    }
    pub use self::b::*;
}

fn main() {
    println!("{}", a::macro_b!());
}

I expected to see this happen: No warning generated

Instead, this happened: cargo check generated such warning

warning: glob import doesn't reexport anything because no candidate is public enough
  --> src/main.rs:10:13
   |
10 |     pub use self::b::*;
   |             ^^^^^^^^^^
   |
   = note: `#[warn(unused_imports)]` on by default

Though the warning says that glob import doesn't reexport anything, commenting out this line leads to error:

error[E0433]: failed to resolve: could not find `macro_b` in `a`
  --> src/main.rs:14:23
   |
14 |     println!("{}", a::macro_b!());
   |                       ^^^^^^^ could not find `macro_b` in `a`

warning: unused macro definition: `macro_b`
 --> src/main.rs:3:22
  |
3 |         macro_rules! macro_b {
  |                      ^^^^^^^
  |
  = note: `#[warn(unused_macros)]` on by default

warning: unused import: `macro_b`
 --> src/main.rs:8:24
  |
8 |         pub(crate) use macro_b;
  |                        ^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

For more information about this error, try `rustc --explain E0433`.

The warning will not be generated when any other pub functions are added into module b and exported. It happens when the module only exports macros.

Meta

rustc --version --verbose:

rustc 1.74.0-nightly (65ea825f4 2023-09-18)
binary: rustc
commit-hash: 65ea825f4021eaf77f1b25139969712d65b435a4
commit-date: 2023-09-18
host: x86_64-unknown-linux-gnu
release: 1.74.0-nightly
LLVM version: 17.0.0

[eopb]

@rustbot label T-compiler A-diagnostics D-incorrect