Error on compile gcc 15.2 and gcc-trunk ( 16.0.1 stage4)

[MedvedMaeru]

/Development/misbuild/3rdparty/argparse/argparse.hpp:372:32: error: 'template<class T> T argparse::details::do_strtod(const std::string&)' exposes TU-local entity 'template<class T> std::nullptr_t argparse::details::{anonymous}::generic_strtod<T>' 372 | template <class T> inline auto do_strtod(std::string const &s) -> T { | ^~~~~~~~~ /Development/misbuild/3rdparty/argparse/argparse.hpp:364:38: note: 'template<class T> std::nullptr_t argparse::details::{anonymous}::generic_strtod<T>' declared with internal linkage 364 | template <class T> inline const auto generic_strtod = nullptr; | ^~~~~~~~~~~~~~ /Development/misbuild/3rdparty/argparse/argparse.hpp:311:8: error: 'template<class T> T argparse::details::parse_number<T>::operator()(std::string_view)' exposes TU-local entity 'argparse::details::radix_16' 311 | auto operator()(std::string_view s) -> T { | ^~~~~~~~ /Development/misbuild/3rdparty/argparse/argparse.hpp:170:15: note: 'argparse::details::radix_16' declared with internal linkage 170 | constexpr int radix_16 = 16; | ^~~~~~~~ /Development/misbuild/3rdparty/argparse/argparse.hpp:278:8: error: 'template<class T> T argparse::details::parse_number<T, 16>::operator()(std::string_view)' exposes TU-local entity 'argparse::details::radix_16' 278 | auto operator()(std::string_view s) -> T { | ^~~~~~~~ /Development/misbuild/3rdparty/argparse/argparse.hpp:170:15: note: 'argparse::details::radix_16' declared with internal linkage 170 | constexpr int radix_16 = 16; |

have same error on gcc linux and macos, clang 21.1.8 compile it by normal