src/test/ui/consts/const-eval/assign-to-static-within-other-static-2.rs

// New test for #53818: modifying static memory at compile-time is not allowed.
// The test should never compile successfully

#![feature(const_raw_ptr_deref, const_mut_refs)]

use std::cell::UnsafeCell;

struct Foo(UnsafeCell<u32>);

unsafe impl Send for Foo {}
unsafe impl Sync for Foo {}

static FOO: Foo = Foo(UnsafeCell::new(42));

static BAR: () = unsafe {
    *FOO.0.get() = 5; //~ ERROR
};

fn main() {}