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UB is part of the C++ standard. Surely you can understand the difference between the C++ standard and bugs in compilers implementing the C++ standard. This is that.

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Which part of the Rust standard does cve-rs violate?

Rust does not have an ISO standard, but it does have a language design, and if you knew the first thing about cve-rs (including what’s on its own Github page), you would know that this is an extremely confirmed soundness bug.

The cve-rs repo is not meant to be the toxic gotcha aimed at Rust language maintainers you seem to think it is. It’s a repro case.

So the detailed spec is "whatever the compiler does". And the compiler allows cve-rs, so it does not violate the detailed spec.

No, and you are clearly trolling, and I’ll engage in no further interaction with you.

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