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seanmonstar's profile
Sean McArthur
Sean McArthur
Sean McArthur
@seanmonstar

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Sean McArthur

@seanmonstar

rust all the https

seanmonstar.com
Joined December 2008

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    Sean McArthur‏ @seanmonstar 18 Jun 2018
    • Report Tweet
    • Report NetzDG Violation

    I see a fair amount of people claiming the Rust borrow checker is stupid, that they know better whether something is safe... This is the exact reason so many CVEs come out, with most being because of memory safety. Don't add to it.

    9:18 AM - 18 Jun 2018
    • 18 Retweets
    • 121 Likes
    • Julian Tescher David Barsky nia 👁 GLaMDRINGOS 🦀 Pedder 🏸 Brendan Zabarauskas bendingoutward Stephen Demos degausser the hand washer
    7 replies 18 retweets 121 likes
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      2. Kevin Hoffman  🦀‏ @KevinHoffman 18 Jun 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @seanmonstar

        I am inherently skeptical of any statement that includes the phrase "I know better". I certainly don't know better, and if I think I know better than the borrow checker, the onus is on me to prove it by indicating explicit lifetimes.

        1 reply 0 retweets 11 likes
      3. Sean McArthur‏ @seanmonstar 18 Jun 2018
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        Replying to @KevinHoffman

        I don't want to trust technology to people who "know better".

        0 replies 0 retweets 7 likes
      4. End of conversation
      1. New conversation
      2. James Tucker‏ @raggi 18 Jun 2018
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        Replying to @seanmonstar

        Non-lexical lifetimes is a huge important feature this year and is not currently supported.

        1 reply 0 retweets 1 like
      3. Sean McArthur‏ @seanmonstar 18 Jun 2018
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        • Report NetzDG Violation
        Replying to @raggi

        Certainly true, but NLL isn't the solution to a ton of the complaints I see. Far too often the answer is "actually, the compiler is right, what you wanted is unsafe". The cases when NLL would help me, I've been able to fix it with weird dances, while not reaching for unsafe.

        1 reply 0 retweets 4 likes
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      1. Jed Davis  🏳️‍🌈‏ @xlerb 18 Jun 2018
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        Replying to @seanmonstar

        My favorite example of this is https://www.mozilla.org/en-US/security/advisories/mfsa2016-92/ … — the underlying bug was exactly what the borrow rules prevent, and the emergency fix was the equivalent of a RefCell check.

        0 replies 4 retweets 10 likes
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      1. N  🌠‏ @Nyubis_ 18 Jun 2018
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        Replying to @seanmonstar

        I don't know better than the borrow checker, I just sometimes struggle to explain my reasoning — and then I don't know whether I'm bad at reasoning (i.e. wrong) or bad at explaining.

        0 replies 0 retweets 0 likes
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      1. Fleischmann‏ @ChiefDetektor 19 Jun 2018
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        Replying to @seanmonstar

        the rust borrow checker taught me how to write better c and cpp code. :D

        0 replies 0 retweets 0 likes
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      1. fneddy ¯\_(ツ)_/¯‏ @agmen 19 Jun 2018
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        Replying to @seanmonstar

        Can I have the borrow checker for c and c++ please?

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