`clippy::all` is not all

[BenjaminBrienen]

Summary

In my build script, I generate code. I put attributes on that code to silence lints.

Reproducer

I tried this code:

#![allow(clippy::all, reason = "generated code")]
#![allow(rustc::all, reason = "generated code")]

enum X {
    A,
    B,
    C,
}

impl X {
    fn foo(self) {
        match self {
            X::A => todo!(),
            X::B => todo!(),
            X::C => todo!(),
        }
    }
}

I expected to see this happen: no lints triggered

Instead, this happened:

A bunch, such as:

warning: this ident consists of a single char
 --> crates/profile/src/lib.rs:4:6
  |
4 | enum X {
  |      ^
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#min_ident_chars
  = note: `-W clippy::min-ident-chars` implied by `-W clippy::restriction`
  = help: to override `-W clippy::restriction` add `#[allow(clippy::min_ident_chars)]`

Version

rustc 1.87.0 (17067e9ac 2025-05-09)
binary: rustc
commit-hash: 17067e9ac6d7ecb70e50f92c1944e545188d2359
commit-date: 2025-05-09
host: x86_64-unknown-linux-gnu
release: 1.87.0
LLVM version: 20.1.1

Additional Labels

No response

[profetia]

The all is very misleading and there is already discussions about renaming it.

[blyxyas]

See https://rust-lang.zulipchat.com/#narrow/channel/257328-clippy/topic/Renaming.20clippy.3A.3Aall/with/510794361