Clippy lint · Suspicious · checked with Clippy 0.1.99

clippy::deprecated_clippy_cfg_attr: `feature = "cargo-clippy"` was replaced by `clippy`

What it meansChecks for #[cfg_attr(feature = "cargo-clippy", ...)] and for #[cfg(feature = "cargo-clippy")] and suggests to replace it with #[cfg_attr(clippy, ...)] or #[cfg(clippy)]. It is in the suspicious group and warns by default.

What you see

warning: `feature = "cargo-clippy"` was replaced by `clippy`
 --> main.rs:3:7
  |
3 | #[cfg(feature = "cargo-clippy")]
  |       ^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `clippy`
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/stable/index.html#deprecated_clippy_cfg_attr
  = note: `#[warn(clippy::deprecated_clippy_cfg_attr)]` on by default

Real output of Clippy 0.1.99 (Rust 1.99) on the example below. Names and line numbers in yours will differ.

Does it matter?

This feature has been deprecated for years and shouldn’t be used anymore.

Code that is most likely wrong or useless. Warns by default.

How to fix it

Clippy can fix this one for you: run cargo clippy --fix (add --allow-dirty if you have uncommitted changes). Review the diff before you commit.

Flagged

#[cfg(feature = "cargo-clippy")]
struct Bar;

Write this instead

#[cfg(clippy)]
struct Bar;

Turn it off, or on

Allow it where it does not fit your code, as narrowly as you can:

On one item

#[allow(clippy::deprecated_clippy_cfg_attr)]
fn my_function() { /* ... */ }

Whole crate (Cargo.toml)

[lints.clippy]
deprecated_clippy_cfg_attr = "allow"

One run

cargo clippy -- -A clippy::deprecated-clippy-cfg-attr

The [lints] table needs Rust 1.74 or newer. In a workspace, put it under [workspace.lints.clippy] and add [lints] workspace = true to each member.

Suspiciousgroup

warndefault level

yesfixed by cargo clippy --fix

1.78.0added in Rust

Clippy's own documentation

What it does

Checks for #[cfg_attr(feature = "cargo-clippy", ...)] and for #[cfg(feature = "cargo-clippy")] and suggests to replace it with #[cfg_attr(clippy, ...)] or #[cfg(clippy)].

Why is this bad?

This feature has been deprecated for years and shouldn’t be used anymore.

Example

#[cfg(feature = "cargo-clippy")]
struct Bar;

Use instead:

#[cfg(clippy)]
struct Bar;

From the Clippy lint list (0.1.99), part of the Rust project, MIT or Apache-2.0. Official entry.

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