I have several production Rust projects under my belt and while I am nowhere near the level of most full-time Rust devs (I don't work with Rust full-time, it's

I have several production Rust projects under my belt and while I am nowhere near the level of most full-time Rust devs (I don't work with Rust full-time, it's opportunity based for me) I have noticed that it's very difficult to introduce such leaks with Rust. It is possible to do it by using Arc / Rc and cyclical references (which the borrow checker makes infuriatingly difficult -- for good reason!) but you really have to go out of your way for it. And while there are real projects where you need such idioms I have found that you should not try to twist Rust's arm and just opt for something like arena allocator.