Since [P3068r6](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2024/p3068r6.html) C++ exceptions and most of `exception_ptr` support functions to get `current_exception`, `make_exception_ptr`, and `rethrow_exception` are `constexpr` enabled. But newly added function `exception_ptr_cast` from paper [P2927r3](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2025/p2927r3.html) adopted in Sofia is not. I consider this an unfortunate overlook but easily fixable as its implementation is trivial.