clippy::missing_docs_in_private_items detects const in fn but --document-private-items doesn't generate it.

[nogiro]

Summary

clippy::missing_docs_in_private_items seems to trigger in const in fn, but cargo doc --document-private-items doesn't generate this const.

Lint Name

missing_docs_in_private_items

Reproducer

I tried this code:

#![warn(clippy::missing_docs_in_private_items)]

//! `const` in `fn`.

/// The application entry point.
fn main() {
    const MSG: &str = "Hello, world!";
    println!("{MSG}");
}

I expected to see this happen:

warning: missing documentation for a constant
 --> src/main.rs:7:5
  |
7 |     const MSG: &str = "Hello, world!";
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#missing_docs_in_private_items
note: the lint level is defined here
 --> src/main.rs:1:9
  |
1 | #![warn(clippy::missing_docs_in_private_items)]
  |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

warning: `missing_docs_in_private_items_detects_const_in_fn` (bin "missing_docs_in_private_items_detects_const_in_fn") generated 1 warning
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.00s

Instead, this happened:

No warning.

Version

rustc 1.80.1 (3f5fd8dd4 2024-08-06)
binary: rustc
commit-hash: 3f5fd8dd41153bc5fdca9427e9e05be2c767ba23
commit-date: 2024-08-06
host: x86_64-unknown-linux-gnu
release: 1.80.1
LLVM version: 18.1.7

Additional Labels

No response