[libcxx-commits] [libcxx] [libc++][hardening] Categorize more assertions. (PR #75918)

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EricWF wrote:

> > Are `_LIBCPP_ASSERT_INTERNAL` checks things that should only fail if our implementation is incorrect?
> 
> Yes, exactly.

Thanks for separating these out. We should consider if we want these, at all, at least in fully mature code. Have we ever seen these fire in the wild?

Also this change LGTM. Thanks (once fixing the bots of course).

https://github.com/llvm/llvm-project/pull/75918