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Comment by rvz | Hacker News Reader

Now we are at the phase where, Rust is “safe” but only if you use it “correctly” and without using X language feature or a custom Y feature.

This is the problem when a language advertises with “guarantees” and it turns out it never had any due to many false assumptions by their promoters.

So what other soundness bugs are there in the language that we need to know about?

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No we're in a situation where a bug in the type checker was found and will be fixed and a new release will be made.

That it took 11 years for someone to come across this is a fairly intense counterargument to your attempt to paint this as a language with dangerous footguns.

I'm not defending rust here - a correctness bug invalidates the premise. But I am saying that I've never seen a custom drop in production.

For some reason this is controversial, but it remains true.

Custom drops are all over the place. As others have said.

But not custom drops that are doing variadic type stuff like this, usually.

You said/implied 2 things:

- you've never written a custom Drop

- "Not really". Implying that your experience generalizes

I've written a bunch of rust programs without custom Drop. I believe your first statement. There are large classes of programs that don't need it. There are also many that do. I think your statement says a lot more about what kind of programs you work on than about custom Drop not being common. People are downvoting the implication that custom Drop is not a common pattern.

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