Yeah, not sure I understand the criticism here. This program also has a bug.

  fn main() {
      let a = 3;
      assert(a == 2, "a should definitely be 2");
  }

Rust doesn't mean no bugs ever, and it doesn't mean no crashes. It protects you from a very specific class of severe bugs, and it has a pretty good set of built-in primitives to help you write bug-free code in the other classes. No more, no less.