error: arithmetic detected --> $DIR/arithmetic.rs:50:21 | LL | let mut _a = 1; _a += 1; | ^^^^^^^ | = note: `-D clippy::arithmetic` implied by `-D warnings` error: arithmetic detected --> $DIR/arithmetic.rs:52:26 | LL | let mut _b = 1; _b = _b + 1; | ^^^^^^ error: arithmetic detected --> $DIR/arithmetic.rs:54:26 | LL | let mut _c = 1; _c = 1 + _c; | ^^^^^^ error: aborting due to 3 previous errors