The helper function `__pair_like_explicit_wknd` is only SFINAE-ed with `tuple_size<remove_cvref_t<_PairLike>>::value == 2`, but its function body assumes `std::get` being valid. Fixes #65620
The helper function `__pair_like_explicit_wknd` is only SFINAE-ed with `tuple_size<remove_cvref_t<_PairLike>>::value == 2`, but its function body assumes `std::get` being valid. Fixes #65620