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MS UCRT seems confused on the status of LWG1327, and still provides pre-LWG1327 overload set the related math functions, which can't handle integer types as required. It is probably that UCRT won't fixed this in a near future, per https://developercommunity.visualstudio.com/t/10294165. Before C++20, libc++ worked around this bug by relying on `-fdelayed-template-parsing`. However, this non-conforming option is off by default since C++20. I think we should use `requires` instead. --------- Co-authored-by: Louis Dionne <ldionne.2@gmail.com>