error: unused import: `std::thread` --> $DIR/issue-30730.rs:3:5 | LL | use std::thread; | ^^^^^^^^^^^ | note: the lint level is defined here --> $DIR/issue-30730.rs:2:9 | LL | #![deny(warnings)] | ^^^^^^^^ = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]` error: aborting due to previous error