95% of my "logic errors" are related to surprise nulls (causing a data leak of sensitive data) or surprise mutability. The idea that there is no debug cycle is ridiculous but I am confident that there will be less of them in Rust.

I bet it won't survive a pentest attack, and there are more things missing on program expectations than only nullability.

On the type system theory, Rust still has quite something to catch up to theorem provers, which even those aren't without issues.