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#![feature(rustc_attrs)]
#![allow(unused,dead_code)]
fn nested_field() {
#[rustc_layout_scalar_valid_range_start(1)]
struct NonZero<T>(T);
let mut foo = unsafe { NonZero((1,)) };
foo.0.0 = 0;
//~^ ERROR: mutation of layout constrained field is unsafe
}
fn block() {
#[rustc_layout_scalar_valid_range_start(1)]
struct NonZero<T>(T);
let mut foo = unsafe { NonZero((1,)) };
{ foo.0 }.0 = 0;
// ^ not unsafe because the result of the block expression is a new place
}
fn main() {}
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