error: Negation by multiplying with -1 --> neg_multiply.rs:30:5 | 30 | x * -1; | ^^^^^^ | = note: `-D neg-multiply` implied by `-D warnings` error: Negation by multiplying with -1 --> neg_multiply.rs:32:5 | 32 | -1 * x; | ^^^^^^ error: aborting due to 2 previous errors To learn more, run the command again with --verbose.