Method on_error

extlibs/fmt/include/fmt/format-inl.h:1353–1355

}

FMT_FUNC void internal::error_handler::on_error(const char* message) {
  FMT_THROW(format_error(message));
}

FMT_FUNC void report_system_error(int error_code,
                                  fmt::string_view message) FMT_NOEXCEPT {