File: ranged_ints4.rs

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rustc 1.85.0%2Bdfsg3-1
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#![feature(rustc_attrs)]

#[rustc_layout_scalar_valid_range_start(1)]
#[repr(transparent)]
pub(crate) struct NonZero<T>(pub(crate) T);
fn main() {
    let mut x = unsafe { NonZero(1) };
    x.0 = 0; //~ ERROR mutation of layout constrained field is unsafe
}