Finding a bug doesn't mean you need to fix it, or fix it right away. Using Rust doesn't preclude resource leaks. I'm pretty sure I've managed to run into resource leaks in all of the languages I've used in production, doesn't matter if they were managed or not. Sometimes limiting the lifetime of the thing that holds resources, and let process (or system) death clean it up works great; sometimes that's terrible, depends on the cost of death/restart, the lifetime between deaths, human intervention required, accuracy of lifetime estimation method, probably some other things. I don't worry too much about leaks that require a restart every year or so; nor would I worry about a leak in a missile that will cause issues beyond the achievable maximum flight time.