#![feature(platform_intrinsics, repr_simd)] extern "platform-intrinsic" { pub(crate) fn simd_rem(x: T, y: T) -> T; } #[repr(simd)] #[allow(non_camel_case_types)] struct i32x2(i32, i32); fn main() { unsafe { let x = i32x2(1, 1); let y = i32x2(1, 0); simd_rem(x, y); //~ERROR: Undefined Behavior: calculating the remainder with a divisor of zero } }