Seems pretty impressive they rewrote the coreutils in a new language, with so little Unix experience, and managed to do such a good job with very little bugs or vulns. I would have expected an order of magnitude more at least.
Shows how good Rust is, that even inexperienced Unix devs can write stuff like this and make almost no mistakes.
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Yes, it's the lack of Unix experience that's terrifying. So many of mistakes listed are rookie mistakes, like not propagating the most severe errors, or the `kill -1` thing. Why were people who apparently did not have much experience using coreutils assigned to rewrite coreutils?