Unsoundness / Use After Free if a custom Drop impl references other data allocated on the allocator.

[TimNN]

The following code fails under Miri and with -Zsanitizer=address:

use rodeo::Rodeo;

struct Broken<'a>(Option<&'a String>);

impl<'a> core::ops::Drop for Broken<'a> {
    fn drop(&mut self) {
        println!("{:?}", self.0)
    }
}

fn main() {
    let r = Rodeo::new();
    let x = r.alloc(Broken(None));
    x.0 = Some(r.alloc(String::from("Hello, world!")));
}

[polazarus]

The problem is indeed critical. I will yank the current version and add 'static requirement on T for now.

[polazarus]

Done! Will need to revisit the whole self referential issue one day