clippy::renamed_function_params: renamed function parameter of trait impl

What you see

warning: renamed function parameter of trait impl
 --> main.rs:6:18
  |
6 |     fn eq(&self, b: &Self) -> bool {
  |                  ^
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/stable/index.html#renamed_function_params
  = note: requested on the command line with `-W clippy::renamed-function-params`
help: consider using the default name
  |
6 -     fn eq(&self, b: &Self) -> bool {
6 +     fn eq(&self, other: &Self) -> bool {
  |

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?

Using the default name for parameters of a trait method is more consistent.

Lints that forbid language features for specific codebases (no unwrap, no indexing...). Off by default; pick them one by one, never the whole group.

How to fix it

Clippy does not fix this one automatically. Change the code by hand:

Flagged

struct A(u32);

impl PartialEq for A {
    fn eq(&self, b: &Self) -> bool {
        self.0 == b.0
    }
}

Write this instead

struct A(u32);

impl PartialEq for A {
    fn eq(&self, other: &Self) -> bool {
        self.0 == other.0
    }
}

Turn it off, or on

It is off by default. To use it, set it to warn or deny:

[lints.clippy]
renamed_function_params = "warn"

#![warn(clippy::renamed_function_params)]

cargo clippy -- -W clippy::renamed-function-params

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.