linkme-status-access-violation-a.rs

use linkme::distributed_slice;

pub struct Item {
    pub name: &'static str,
}

impl Item {
    #[inline(never)]
    fn len(&self) -> usize {
        self.name.len()
    }
}

#[distributed_slice]
pub static ITEMS: [Item] = [..];

macro_rules! make_items {
    ($($name:ident = $str:literal),* $(,)?) => {
        $(
            #[distributed_slice(ITEMS)]
            static $name: Item = Item {
                name: $str,
            };
        )*
    }
}
make_items! {
    ITEM1 = "item1",
    ITEM2 = "item2",
    ITEM3 = "item3",
}

#[test]
fn test_failure() {
    let mut last_address = None;
    for item in ITEMS {
        // These 4 lines required to trigger the bug
        let address = item as *const Item as usize;
        if let Some(last) = last_address {
            assert_eq!(address - last, std::mem::size_of::<Item>());
        }
        last_address = Some(address);

        println!("{} {}", item.len(), item.name);
        // assert_eq!(item.len(), 5);  // Causes STATUS_ILLEGAL_INSTRUCTION
    }
}