, std::chrono::duration<long int, std::ratio<1, 1000000000> > >]' is implicitly deleted because its exception-specificationdoes not match the implicit exception-specification '' ^~
:15: note: 'constexpr std::__mutex_base::__mutex_base() noexcept' is implicitly deleted because its exception-specificationdoes not match the implicit exception-specification 'noexcept (false)'
constexpr __mutex_base() noexcept