[kibwen]

One last thing that deserves to be mentioned: Rust does have unwinding-on-failure, which is similar to exceptions, with the restriction that unwinding can only be caught at task boundaries. This allows failure in a single component to be isolated and contained. The pertinent distinction here is that the unwinding is not resumable in the normal sense; at best, a parent task can detect that a child task has failed and attempt to restart the task, without having the ability to persist any of the failed task's state.