It is not an exception; #[may_dangle] does not change the time drop runs. All it does is promise that drop will not access borrowed data, allowing that data to

It is not an exception; #[may_dangle] does not change the time drop runs. All it does is promise that drop will not access borrowed data, allowing that data to die before drop: https://doc.rust-lang.org/nightly/nomicon/dropck.html https://doc.rust-lang.org/nightly/nomicon/dropck.html