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14e59bb317c3c901bce83deb16ee9bfa5cc90e28
rust/tests/ui/numbers-arithmetic/overflowing-neg-nonzero.rs

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Implement `Neg` for signed non-zero integers. Negating a non-zero integer currently requires unpacking to a primitive and re-wrapping. Since negation of non-zero signed integers always produces a non-zero result, it is safe to implement `Neg` for `NonZeroI{N}`. The new `impl` is marked as stable because trait implementations for two stable types can't be marked unstable.
2022-09-27 11:40:39 +09:00
// run-fail
Change default panic handler message format.
2023-06-20 19:16:18 +02:00
// error-pattern:attempt to negate with overflow
Implement `Neg` for signed non-zero integers. Negating a non-zero integer currently requires unpacking to a primitive and re-wrapping. Since negation of non-zero signed integers always produces a non-zero result, it is safe to implement `Neg` for `NonZeroI{N}`. The new `impl` is marked as stable because trait implementations for two stable types can't be marked unstable.
2022-09-27 11:40:39 +09:00
// ignore-emscripten no processes
// compile-flags: -C debug-assertions
#![allow(arithmetic_overflow)]
use std::num::NonZeroI8;
fn main() {
let _x = -NonZeroI8::new(i8::MIN).unwrap();
}
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