False positive on only_used_in_recursion #9384
Description
Summary
The lint only_used_in_recursion is raising an error but I cannot figure out why.
You can check this Rust Playground here.
Lint Name
only_used_in_recursion
Reproducer
I tried this code (Rust Playground):
#![deny(clippy::only_used_in_recursion)] struct Value(i32); fn set_to_last(mut value: Value, values: &[i32]) { value.0 = *values.iter().last().unwrap(); }I saw this happen:
error: parameter is only used in recursion --> src/lib.rs:6:16 | 6 | fn set_to_last(mut value: Value, values: &[i32]) { | ^^^^^^^^^ help: if this is intentional, prefix with an underscore: `_value` | note: the lint level is defined here --> src/lib.rs:2:9 | 2 | #![deny(clippy::only_used_in_recursion)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#only_used_in_recursion I expected no error.
Version
rustc 1.63.0 (4b91a6ea7 2022-08-08) binary: rustc commit-hash: 4b91a6ea7258a947e59c6522cd5898e7c0a6a88f commit-date: 2022-08-08 host: x86_64-apple-darwin release: 1.63.0 LLVM version: 14.0.5 Additional Labels
No response