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And while we're in the hypothetical extreme world somewhat separated from reality, a series of solar flares could flip a memory bit and all the error-correction

And while we're in the hypothetical extreme world somewhat separated from reality, a series of solar flares could flip a memory bit and all the error-correction bits in my ECC ram at once to change a pointer in memory, causing my safe rust to do an out of bounds write. Until we design perfectly correct computer hardware, processors, and a sun which doesn't produce solar radiation, we can't rely on totally uniform correct execution of our code, so we should give up. The reality is that while we can't prove the rust compiler is safe, we can keep using it and diligently fix any counter-examples, and that's good enough in practice. Over in the real world, where we can acknowledge "yes, it is impossible to prove the absence of all bugs" and simultaneously say "but things sure seem to be working great, so we can get on with life and fix em if/when they pop up".

no_wizard 2y ago
I’m simply positing how do we know the safety guarantees hold, not a hypothetical extreme. Not really sure where the extreme comes in. If you take Rust at face value, than this to me seems like an obvious question to ask
- TheDong 2y ago
  Sorry, it's just that I have an allergic reaction to what sounds like people trying to make debate-bro arguments. Like, when I say "use signal, it's secure", someone could respond "Ahh, but technically you can't prove the absence of bugs, signal could have serious bugs, so it's not secure, you fool", but like everyone reading this already knew "it's secure" means "based on current evidence and my opinion it seems likely to be more secure than alternatives", and it got shortened. Interpreting things as absolutes that are true or false is pointless debate-bro junk which lets you create strawmen out of normal human speech. When someone says "1+1 = 2", and a debate-bro responds "ahh but in base-2 it's 10 you fool", it's just useless internet noise. Sure, it's correct, but it's irrelevant, everyone already knows it, the original comment didn't mean otherwise. Responding to "safe Rust should never cause out-of-bounds access, use-after-free" with "ahh but we can't prove the compiler is safe, so rust isn't safe is it??" is a similarly sorta response. Everyone already knows it. It's self-evident. It adds nothing. It sounds like debate-bro "I want to argue with you so I'm saying something that's true, but we both already know and doesn't actually matter". I think that allergic response came out, apologies if it was misguided in this case and you're not being a debate-bro.
  - johnisgood 2y ago
    But you have to admit Rust zealots are misguided, too, who does not happen to know or realize the obviousness of what you just said with regarding to Rust.
    - TheDong 2y ago
      Such a rust zealot is a strawman, though please don't let me stop you from enjoying burning such a strawman.
      - johnisgood 2y ago
        How is it a strawman? Many people have misconceptions with regarding to Rust, while not even knowing about the existence of Ada/SPARK to begin with. They blindly spout "Rust is saFeEe!44!". If you are not a zealot, then it is not applied to you.
        School-Cotton 2y ago
        I see about 1000x more anti-rust-zealot strawman arguments than rust zealots on this site. Can you give some examples of the misguided rust zealotry you’re talking about?
        johnisgood 2y ago
        I deleted my initial response, but FWIW you do not have to go far, take a look at the title of this submission.
        deleted 2y ago
        [deleted]
  - no_wizard 2y ago
    I don't think we can go beyond the 'human limitations' if you will, of any software. Bugs happen, they're bound to. Its more, what is enforcing the Rust language guarantees and how do we know its enforcing them with reasonably high accuracy one can ascertain? I feel that it can only happen as Rust itself becomes (or perhaps it meaningfully already is) written in pure 100% safe Rust itself. At which point, I believe the matter will be largely settled. Until then, I don't think its unreasonable for someone to ask about how it verifies its assertions is all.

no_wizard 2y ago

I’m simply positing how do we know the safety guarantees hold, not a hypothetical extreme. Not really sure where the extreme comes in. If you take Rust at face value, than this to me seems like an obvious question to ask

TheDong 2y ago
Sorry, it's just that I have an allergic reaction to what sounds like people trying to make debate-bro arguments. Like, when I say "use signal, it's secure", someone could respond "Ahh, but technically you can't prove the absence of bugs, signal could have serious bugs, so it's not secure, you fool", but like everyone reading this already knew "it's secure" means "based on current evidence and my opinion it seems likely to be more secure than alternatives", and it got shortened. Interpreting things as absolutes that are true or false is pointless debate-bro junk which lets you create strawmen out of normal human speech. When someone says "1+1 = 2", and a debate-bro responds "ahh but in base-2 it's 10 you fool", it's just useless internet noise. Sure, it's correct, but it's irrelevant, everyone already knows it, the original comment didn't mean otherwise. Responding to "safe Rust should never cause out-of-bounds access, use-after-free" with "ahh but we can't prove the compiler is safe, so rust isn't safe is it??" is a similarly sorta response. Everyone already knows it. It's self-evident. It adds nothing. It sounds like debate-bro "I want to argue with you so I'm saying something that's true, but we both already know and doesn't actually matter". I think that allergic response came out, apologies if it was misguided in this case and you're not being a debate-bro.
- johnisgood 2y ago
  But you have to admit Rust zealots are misguided, too, who does not happen to know or realize the obviousness of what you just said with regarding to Rust.
  - TheDong 2y ago
    Such a rust zealot is a strawman, though please don't let me stop you from enjoying burning such a strawman.
    - johnisgood 2y ago
      How is it a strawman? Many people have misconceptions with regarding to Rust, while not even knowing about the existence of Ada/SPARK to begin with. They blindly spout "Rust is saFeEe!44!". If you are not a zealot, then it is not applied to you.
      - School-Cotton 2y ago
        I see about 1000x more anti-rust-zealot strawman arguments than rust zealots on this site. Can you give some examples of the misguided rust zealotry you’re talking about?
        johnisgood 2y ago
        I deleted my initial response, but FWIW you do not have to go far, take a look at the title of this submission.
        deleted 2y ago
        [deleted]
- no_wizard 2y ago
  I don't think we can go beyond the 'human limitations' if you will, of any software. Bugs happen, they're bound to. Its more, what is enforcing the Rust language guarantees and how do we know its enforcing them with reasonably high accuracy one can ascertain? I feel that it can only happen as Rust itself becomes (or perhaps it meaningfully already is) written in pure 100% safe Rust itself. At which point, I believe the matter will be largely settled. Until then, I don't think its unreasonable for someone to ask about how it verifies its assertions is all.