error: this arithmetic operation will overflow --> $DIR/overflowing-lsh-2.rs:7:14 | LL | let _x = 1 << -1; | ^^^^^^^ attempt to shift left by `-1_i32`, which would overflow | note: the lint level is defined here --> $DIR/overflowing-lsh-2.rs:4:9 | LL | #![deny(arithmetic_overflow, const_err)] | ^^^^^^^^^^^^^^^^^^^ error: aborting due to previous error