It won't be bug free, but it will be free of certain classes of bugs. That's the compelling reason for Rust - avoiding the many pitfalls and undefined behavior

It won't be bug free, but it will be free of certain classes of bugs. That's the compelling reason for Rust - avoiding the many pitfalls and undefined behavior of C and C++. As for exactly which bugs (safe) Rust prevents, memory safety is one, but I'll let someone more knowledgeable answer - I'm sure they'll be along shortly.