Zero-values are not like use-after-free or similar errors, as they are actually type safe. But they consistently create logic errors, as they get bubbled up and

Zero-values are not like use-after-free or similar errors, as they are actually type safe. But they consistently create logic errors, as they get bubbled up and require runtime validation which is simply something that never gets donde once at the right place. It reminds of PHP's spirit of moving forward despite errors as far as it can go. It looks like it's working, but you can never really trust such a program much.