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Joined 1 year ago
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Cake day: July 1st, 2023

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  • However, Linus’s kernel was more elaborate than GNU Hurd, so it was incorporated.

    Quite the opposite.

    GNU Hurd was a microkernel, using lots of cutting edge research, and necessitating a lot of additional complexity in userspace. This complexity also made it very difficult to get good performance.

    Linux, on the other hand, was just a bog standard Unix monolithic kernel. Once they got a libc working on it, most existing Unix userspace, including the GNU userspace, was easy to port.

    Linux won because it was simple, not elaborate.




  • Fair. But unwrap versus expect isn’t really the point. Sure one has a better error message printed to your backtrace. But IMO that’s not what I’m looking for when I’m looking at a backtrace. I don’t mind plain unwraps or assertions without messages.

    From my experience, when people say “don’t unwrap in production code” they really mean “don’t call panic! in production code.” And that’s a bad take.

    Annotating unreachable branches with a panic is the right thing to do; mucking up your interfaces to propagate errors that can’t actually happen is the wrong thing to do.


  • Unwrap should literally never appear in production code

    Unwrap comes up all the time in the standard library.

    For example, if you know you’re popping from a non-empty vector, unwrap is totally the right too for the job. There are tons of circumstances where you know at higher levels that edge cases defended against at lower levels with Option cannot occur.