useless_asref dosent understand ` &mut &'a`.

Summary

Clippy is saying to remove the "useless_asref" even though it does not work without it.

Lint Name

useless_asref

Reproducer

I tried this code:

fn test_fn<'a>(data: &mut &'a [u8], take: usize) -> &'a [u8] {
    let (val, remaining) = data.split_at(take);
        *data = remaining;
        val
}

fn main(){
    let data : &[u8] = &[0u8,1,2,3,4,5];
    test_fn(&mut data.as_ref(), 2);
}

I saw this happen:

this call to `as_ref` does nothing

I expected to see this happen:
Should not show lint as it does not work without it.

Version

rustc 1.68.2 (9eb3afe9e 2023-03-27)
binary: rustc
commit-hash: 9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0
commit-date: 2023-03-27
host: x86_64-pc-windows-msvc
release: 1.68.2
LLVM version: 15.0.6

Additional Labels

No response

Start with the useless_asref lint and the Rust reproducer in this issue, then run Clippy against it to confirm the warning. Trace why the lint treats &mut &'a [u8] and as_ref() as equivalent; done means the valid call no longer produces a false warning and the reproducer is covered by a regression test.