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> Either way, UB at the LLVM level is not a problem for, and cannot be detected by, code in the safe subsets of Swift and Rust.

But this is not true, there are things that leak through and cause big headaches for the designers of Rust.




designers of Rust or implementors of the rust compiler?

(honest question)


I think the two sets (designers of the Rust language) and (rustc implementors) intersect really well.

I think that the distinction should matter more if/when someone tries another implementation of the language.




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