You know, if you to it in a pure Haskell function, you can be assured that the worst it can do is to use too many resources so it kill its own process. If you do it in a Rust function, well, you have no formal guarantees, but you have to get really out of your way to put a vulnerability like that in the code.

What you don't do is pulling an ages old perl codebase to run over complex formats.