Test output: teeks99-05-dg8-2a-32onarmv7l - serialization - test_variant_xml_archive / gcc-8~c++2a
Rev c8d0b32583c2fa3266edf88cd8ccb32312feae17 / Wed, 20 Nov 2024 03:42:08 +0000
Compile [2024-11-21 00:12:03 UTC]: fail


    "g++-8"   -fvisibility-inlines-hidden -std=c++2a -fPIC -pthread -O0 -fno-inline -Wall -fvisibility=hidden -Wno-unused-variable -Wno-long-long -Winvalid-pch -DBOOST_ALL_NO_LIB=1 -DBOOST_ARCHIVE_TEST=xml_archive.hpp -DBOOST_ATOMIC_DYN_LINK=1 -DBOOST_ATOMIC_NO_LIB=1 -DBOOST_BUILD_PCH_ENABLED -DBOOST_CHRONO_DYN_LINK=1 -DBOOST_CHRONO_NO_LIB=1 -DBOOST_COBALT_USE_STD_PMR=1 -DBOOST_CONTAINER_DYN_LINK=1 -DBOOST_CONTAINER_NO_LIB=1 -DBOOST_FILESYSTEM_DYN_LINK=1 -DBOOST_FILESYSTEM_NO_LIB=1 -DBOOST_LIB_DIAGNOSTIC=1 -DBOOST_MATH_TR1_NO_LIB=1 -DBOOST_RANDOM_DYN_LINK=1 -DBOOST_RANDOM_NO_LIB=1 -DBOOST_REGEX_NO_LIB=1 -DBOOST_SERIALIZATION_DYN_LINK=1 -DBOOST_SERIALIZATION_NO_LIB=1 -DBOOST_SYSTEM_DYN_LINK=1 -DBOOST_SYSTEM_NO_LIB=1 -DBOOST_THREAD_BUILD_DLL=1 -DBOOST_THREAD_POSIX -DBOOST_THREAD_USE_DLL=1 -DBOOST_WSERIALIZATION_DYN_LINK=1   -I".." -I"/mnt/fs1/teeks99-05/run/boost_root/libs/assert/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/atomic/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/bind/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/chrono/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/container/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/container_hash/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/core/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/describe/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/detail/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/endian/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/filesystem/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/function/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/function_types/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/fusion/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/integer/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/intrusive/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/iterator/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/lexical_cast/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/math/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/move/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/mp11/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/optional/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/phoenix/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/predef/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/random/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/ratio/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/regex/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/scope/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/serialization/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/smart_ptr/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/spirit/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/system/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/throw_exception/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/tuple/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/type_index/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/type_traits/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/unordered/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/variant/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/variant2/include" -I"/mnt/fs1/teeks99-05/run/boost_root/libs/winapi/include"  -c -o "/mnt/fs1/teeks99-05/run/results/boost/bin.v2/libs/serialization/test/test_variant_xml_archive.test/gcc-8~c++2a/debug/arm_32/debug-symbols-off/threading-multi/visibility-hidden/test_variant.o" "../libs/serialization/test/test_variant.cpp"

In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant: In instantiation of ???constexpr decltype(auto) std::visit(_Visitor&&, _Variants&& ...) [with _Visitor = are_equal; _Variants = {const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >&, boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >&}]???:
../libs/serialization/test/test_variant.cpp:131:13:   required from ???bool test_type(const Variant&) [with Variant = boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >]???
../libs/serialization/test/test_variant.cpp:173:17:   required from here
/usr/include/c++/8/variant:1375:23: error: ???const class boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? has no member named ???valueless_by_exception???
       if ((__variants.valueless_by_exception() || ...))
            ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/8/variant:1380:17: error: no matching function for call to ???get<0>(const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >&)???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:216:5: note: candidate: ???template<unsigned int _Int, class _Tp1, class _Tp2> constexpr typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& std::get(std::pair<_Tp1, _Tp2>&)???
     get(std::pair<_Tp1, _Tp2>& __in) noexcept
     ^~~
/usr/include/c++/8/utility:216:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::pair<_Tp1, _Tp2>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:221:5: note: candidate: ???template<unsigned int _Int, class _Tp1, class _Tp2> constexpr typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&& std::get(std::pair<_Tp1, _Tp2>&&)???
     get(std::pair<_Tp1, _Tp2>&& __in) noexcept
     ^~~
/usr/include/c++/8/utility:221:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::pair<_Tp1, _Tp2>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:226:5: note: candidate: ???template<unsigned int _Int, class _Tp1, class _Tp2> constexpr const typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& std::get(const std::pair<_Tp1, _Tp2>&)???
     get(const std::pair<_Tp1, _Tp2>& __in) noexcept
     ^~~
/usr/include/c++/8/utility:226:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::pair<_Tp1, _Tp2>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:231:5: note: candidate: ???template<unsigned int _Int, class _Tp1, class _Tp2> constexpr const typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&& std::get(const std::pair<_Tp1, _Tp2>&&)???
     get(const std::pair<_Tp1, _Tp2>&& __in) noexcept
     ^~~
/usr/include/c++/8/utility:231:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::pair<_Tp1, _Tp2>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:240:5: note: candidate: ???template<class _Tp, class _Up> constexpr _Tp& std::get(std::pair<_T1, _T2>&)???
     get(pair<_Tp, _Up>& __p) noexcept
     ^~~
/usr/include/c++/8/utility:240:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:245:5: note: candidate: ???template<class _Tp, class _Up> constexpr const _Tp& std::get(const std::pair<_T1, _T2>&)???
     get(const pair<_Tp, _Up>& __p) noexcept
     ^~~
/usr/include/c++/8/utility:245:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:250:5: note: candidate: ???template<class _Tp, class _Up> constexpr _Tp&& std::get(std::pair<_T1, _T2>&&)???
     get(pair<_Tp, _Up>&& __p) noexcept
     ^~~
/usr/include/c++/8/utility:250:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:255:5: note: candidate: ???template<class _Tp, class _Up> constexpr const _Tp&& std::get(const std::pair<_T1, _T2>&&)???
     get(const pair<_Tp, _Up>&& __p) noexcept
     ^~~
/usr/include/c++/8/utility:255:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:260:5: note: candidate: ???template<class _Tp, class _Up> constexpr _Tp& std::get(std::pair<_Up, _Tp>&)???
     get(pair<_Up, _Tp>& __p) noexcept
     ^~~
/usr/include/c++/8/utility:260:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:265:5: note: candidate: ???template<class _Tp, class _Up> constexpr const _Tp& std::get(const std::pair<_Up, _Tp>&)???
     get(const pair<_Up, _Tp>& __p) noexcept
     ^~~
/usr/include/c++/8/utility:265:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:270:5: note: candidate: ???template<class _Tp, class _Up> constexpr _Tp&& std::get(std::pair<_Up, _Tp>&&)???
     get(pair<_Up, _Tp>&& __p) noexcept
     ^~~
/usr/include/c++/8/utility:270:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:275:5: note: candidate: ???template<class _Tp, class _Up> constexpr const _Tp&& std::get(const std::pair<_Up, _Tp>&&)???
     get(const pair<_Up, _Tp>&& __p) noexcept
     ^~~
/usr/include/c++/8/utility:275:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/8/tuple:39,
                 from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/array:307:5: note: candidate: ???template<unsigned int _Int, class _Tp, unsigned int _Nm> constexpr _Tp& std::get(std::array<_Tp, _Nm>&)???
     get(array<_Tp, _Nm>& __arr) noexcept
     ^~~
/usr/include/c++/8/array:307:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::array<_Tp, _Nm>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/tuple:39,
                 from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/array:316:5: note: candidate: ???template<unsigned int _Int, class _Tp, unsigned int _Nm> constexpr _Tp&& std::get(std::array<_Tp, _Nm>&&)???
     get(array<_Tp, _Nm>&& __arr) noexcept
     ^~~
/usr/include/c++/8/array:316:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::array<_Tp, _Nm>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/tuple:39,
                 from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/array:324:5: note: candidate: ???template<unsigned int _Int, class _Tp, unsigned int _Nm> constexpr const _Tp& std::get(const std::array<_Tp, _Nm>&)???
     get(const array<_Tp, _Nm>& __arr) noexcept
     ^~~
/usr/include/c++/8/array:324:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::array<_Tp, _Nm>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/tuple:39,
                 from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/array:333:5: note: candidate: ???template<unsigned int _Int, class _Tp, unsigned int _Nm> constexpr const _Tp&& std::get(const std::array<_Tp, _Nm>&&)???
     get(const array<_Tp, _Nm>&& __arr) noexcept
     ^~~
/usr/include/c++/8/array:333:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::array<_Tp, _Nm>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/tuple:1314:5: note: candidate: ???template<unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_Elements ...> >& std::get(std::tuple<_Elements ...>&)???
     get(tuple<_Elements...>& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1314:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::tuple<_Elements ...>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/tuple:1320:5: note: candidate: ???template<unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_Elements ...> >& std::get(const std::tuple<_Elements ...>&)???
     get(const tuple<_Elements...>& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1320:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::tuple<_Elements ...>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/tuple:1326:5: note: candidate: ???template<unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_Elements ...> >&& std::get(std::tuple<_Elements ...>&&)???
     get(tuple<_Elements...>&& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1326:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::tuple<_Elements ...>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/tuple:1335:5: note: candidate: ???template<unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_Elements ...> >&& std::get(const std::tuple<_Elements ...>&&)???
     get(const tuple<_Elements...>&& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1335:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::tuple<_Elements ...>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/tuple:1358:5: note: candidate: ???template<class _Tp, class ... _Types> constexpr _Tp& std::get(std::tuple<_Elements ...>&)???
     get(tuple<_Types...>& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1358:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/tuple:1364:5: note: candidate: ???template<class _Tp, class ... _Types> constexpr _Tp&& std::get(std::tuple<_Elements ...>&&)???
     get(tuple<_Types...>&& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1364:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/tuple:1370:5: note: candidate: ???template<class _Tp, class ... _Types> constexpr const _Tp& std::get(const std::tuple<_Elements ...>&)???
     get(const tuple<_Types...>& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1370:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/tuple:1377:5: note: candidate: ???template<class _Tp, class ... _Types> constexpr const _Tp&& std::get(const std::tuple<_Elements ...>&&)???
     get(const tuple<_Types...>&& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1377:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1329:5: note: candidate: ???template<unsigned int _Np, class ... _Types> constexpr std::variant_alternative_t<_Np, std::variant<_Types ...> >& std::get(std::variant<_Types ...>&)???
     get(variant<_Types...>& __v)
     ^~~
/usr/include/c++/8/variant:1329:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:1380:17: note:   types ???std::variant<_Types ...>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/8/variant:1340:5: note: candidate: ???template<unsigned int _Np, class ... _Types> constexpr std::variant_alternative_t<_Np, std::variant<_Types ...> >&& std::get(std::variant<_Types ...>&&)???
     get(variant<_Types...>&& __v)
     ^~~
/usr/include/c++/8/variant:1340:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:1380:17: note:   types ???std::variant<_Types ...>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/8/variant:1351:5: note: candidate: ???template<unsigned int _Np, class ... _Types> constexpr std::variant_alternative_t<_Np, std::variant<_Types ...> >& std::get(const std::variant<_Types ...>&)???
     get(const variant<_Types...>& __v)
     ^~~
/usr/include/c++/8/variant:1351:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::variant<_Types ...>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/8/variant:1362:5: note: candidate: ???template<unsigned int _Np, class ... _Types> constexpr std::variant_alternative_t<_Np, std::variant<_Types ...> >&& std::get(const std::variant<_Types ...>&&)???
     get(const variant<_Types...>&& __v)
     ^~~
/usr/include/c++/8/variant:1362:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::variant<_Types ...>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/8/variant:881:27: note: candidate: ???template<class _Tp, class ... _Types> constexpr _Tp& std::get(std::variant<_Types ...>&)???
     constexpr inline _Tp& get(variant<_Types...>& __v)
                           ^~~
/usr/include/c++/8/variant:881:27: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:890:28: note: candidate: ???template<class _Tp, class ... _Types> constexpr _Tp&& std::get(std::variant<_Types ...>&&)???
     constexpr inline _Tp&& get(variant<_Types...>&& __v)
                            ^~~
/usr/include/c++/8/variant:890:28: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:900:33: note: candidate: ???template<class _Tp, class ... _Types> constexpr const _Tp& std::get(const std::variant<_Types ...>&)???
     constexpr inline const _Tp& get(const variant<_Types...>& __v)
                                 ^~~
/usr/include/c++/8/variant:900:33: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:909:34: note: candidate: ???template<class _Tp, class ... _Types> constexpr const _Tp&& std::get(const std::variant<_Types ...>&&)???
     constexpr inline const _Tp&& get(const variant<_Types...>&& __v)
                                  ^~~
/usr/include/c++/8/variant:909:34: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:1380:17: error: no matching function for call to ???get<0>(const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >&)???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:216:5: note: candidate: ???template<unsigned int _Int, class _Tp1, class _Tp2> constexpr typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& std::get(std::pair<_Tp1, _Tp2>&)???
     get(std::pair<_Tp1, _Tp2>& __in) noexcept
     ^~~
/usr/include/c++/8/utility:216:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::pair<_Tp1, _Tp2>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:221:5: note: candidate: ???template<unsigned int _Int, class _Tp1, class _Tp2> constexpr typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&& std::get(std::pair<_Tp1, _Tp2>&&)???
     get(std::pair<_Tp1, _Tp2>&& __in) noexcept
     ^~~
/usr/include/c++/8/utility:221:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::pair<_Tp1, _Tp2>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:226:5: note: candidate: ???template<unsigned int _Int, class _Tp1, class _Tp2> constexpr const typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& std::get(const std::pair<_Tp1, _Tp2>&)???
     get(const std::pair<_Tp1, _Tp2>& __in) noexcept
     ^~~
/usr/include/c++/8/utility:226:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::pair<_Tp1, _Tp2>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:231:5: note: candidate: ???template<unsigned int _Int, class _Tp1, class _Tp2> constexpr const typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&& std::get(const std::pair<_Tp1, _Tp2>&&)???
     get(const std::pair<_Tp1, _Tp2>&& __in) noexcept
     ^~~
/usr/include/c++/8/utility:231:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::pair<_Tp1, _Tp2>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:240:5: note: candidate: ???template<class _Tp, class _Up> constexpr _Tp& std::get(std::pair<_T1, _T2>&)???
     get(pair<_Tp, _Up>& __p) noexcept
     ^~~
/usr/include/c++/8/utility:240:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:245:5: note: candidate: ???template<class _Tp, class _Up> constexpr const _Tp& std::get(const std::pair<_T1, _T2>&)???
     get(const pair<_Tp, _Up>& __p) noexcept
     ^~~
/usr/include/c++/8/utility:245:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:250:5: note: candidate: ???template<class _Tp, class _Up> constexpr _Tp&& std::get(std::pair<_T1, _T2>&&)???
     get(pair<_Tp, _Up>&& __p) noexcept
     ^~~
/usr/include/c++/8/utility:250:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:255:5: note: candidate: ???template<class _Tp, class _Up> constexpr const _Tp&& std::get(const std::pair<_T1, _T2>&&)???
     get(const pair<_Tp, _Up>&& __p) noexcept
     ^~~
/usr/include/c++/8/utility:255:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:260:5: note: candidate: ???template<class _Tp, class _Up> constexpr _Tp& std::get(std::pair<_Up, _Tp>&)???
     get(pair<_Up, _Tp>& __p) noexcept
     ^~~
/usr/include/c++/8/utility:260:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:265:5: note: candidate: ???template<class _Tp, class _Up> constexpr const _Tp& std::get(const std::pair<_Up, _Tp>&)???
     get(const pair<_Up, _Tp>& __p) noexcept
     ^~~
/usr/include/c++/8/utility:265:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:270:5: note: candidate: ???template<class _Tp, class _Up> constexpr _Tp&& std::get(std::pair<_Up, _Tp>&&)???
     get(pair<_Up, _Tp>&& __p) noexcept
     ^~~
/usr/include/c++/8/utility:270:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:275:5: note: candidate: ???template<class _Tp, class _Up> constexpr const _Tp&& std::get(const std::pair<_Up, _Tp>&&)???
     get(const pair<_Up, _Tp>&& __p) noexcept
     ^~~
/usr/include/c++/8/utility:275:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/8/tuple:39,
                 from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/array:307:5: note: candidate: ???template<unsigned int _Int, class _Tp, unsigned int _Nm> constexpr _Tp& std::get(std::array<_Tp, _Nm>&)???
     get(array<_Tp, _Nm>& __arr) noexcept
     ^~~
/usr/include/c++/8/array:307:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::array<_Tp, _Nm>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/tuple:39,
                 from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/array:316:5: note: candidate: ???template<unsigned int _Int, class _Tp, unsigned int _Nm> constexpr _Tp&& std::get(std::array<_Tp, _Nm>&&)???
     get(array<_Tp, _Nm>&& __arr) noexcept
     ^~~
/usr/include/c++/8/array:316:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::array<_Tp, _Nm>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/tuple:39,
                 from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/array:324:5: note: candidate: ???template<unsigned int _Int, class _Tp, unsigned int _Nm> constexpr const _Tp& std::get(const std::array<_Tp, _Nm>&)???
     get(const array<_Tp, _Nm>& __arr) noexcept
     ^~~
/usr/include/c++/8/array:324:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::array<_Tp, _Nm>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/tuple:39,
                 from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/array:333:5: note: candidate: ???template<unsigned int _Int, class _Tp, unsigned int _Nm> constexpr const _Tp&& std::get(const std::array<_Tp, _Nm>&&)???
     get(const array<_Tp, _Nm>&& __arr) noexcept
     ^~~
/usr/include/c++/8/array:333:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::array<_Tp, _Nm>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/tuple:1314:5: note: candidate: ???template<unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_Elements ...> >& std::get(std::tuple<_Elements ...>&)???
     get(tuple<_Elements...>& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1314:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::tuple<_Elements ...>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/tuple:1320:5: note: candidate: ???template<unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_Elements ...> >& std::get(const std::tuple<_Elements ...>&)???
     get(const tuple<_Elements...>& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1320:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::tuple<_Elements ...>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/tuple:1326:5: note: candidate: ???template<unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_Elements ...> >&& std::get(std::tuple<_Elements ...>&&)???
     get(tuple<_Elements...>&& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1326:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::tuple<_Elements ...>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/tuple:1335:5: note: candidate: ???template<unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_Elements ...> >&& std::get(const std::tuple<_Elements ...>&&)???
     get(const tuple<_Elements...>&& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1335:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::tuple<_Elements ...>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/tuple:1358:5: note: candidate: ???template<class _Tp, class ... _Types> constexpr _Tp& std::get(std::tuple<_Elements ...>&)???
     get(tuple<_Types...>& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1358:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/tuple:1364:5: note: candidate: ???template<class _Tp, class ... _Types> constexpr _Tp&& std::get(std::tuple<_Elements ...>&&)???
     get(tuple<_Types...>&& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1364:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/tuple:1370:5: note: candidate: ???template<class _Tp, class ... _Types> constexpr const _Tp& std::get(const std::tuple<_Elements ...>&)???
     get(const tuple<_Types...>& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1370:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/tuple:1377:5: note: candidate: ???template<class _Tp, class ... _Types> constexpr const _Tp&& std::get(const std::tuple<_Elements ...>&&)???
     get(const tuple<_Types...>&& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1377:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1329:5: note: candidate: ???template<unsigned int _Np, class ... _Types> constexpr std::variant_alternative_t<_Np, std::variant<_Types ...> >& std::get(std::variant<_Types ...>&)???
     get(variant<_Types...>& __v)
     ^~~
/usr/include/c++/8/variant:1329:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:1380:17: note:   types ???std::variant<_Types ...>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/8/variant:1340:5: note: candidate: ???template<unsigned int _Np, class ... _Types> constexpr std::variant_alternative_t<_Np, std::variant<_Types ...> >&& std::get(std::variant<_Types ...>&&)???
     get(variant<_Types...>&& __v)
     ^~~
/usr/include/c++/8/variant:1340:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:1380:17: note:   types ???std::variant<_Types ...>??? and ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/8/variant:1351:5: note: candidate: ???template<unsigned int _Np, class ... _Types> constexpr std::variant_alternative_t<_Np, std::variant<_Types ...> >& std::get(const std::variant<_Types ...>&)???
     get(const variant<_Types...>& __v)
     ^~~
/usr/include/c++/8/variant:1351:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::variant<_Types ...>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/8/variant:1362:5: note: candidate: ???template<unsigned int _Np, class ... _Types> constexpr std::variant_alternative_t<_Np, std::variant<_Types ...> >&& std::get(const std::variant<_Types ...>&&)???
     get(const variant<_Types...>&& __v)
     ^~~
/usr/include/c++/8/variant:1362:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::variant<_Types ...>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/8/variant:881:27: note: candidate: ???template<class _Tp, class ... _Types> constexpr _Tp& std::get(std::variant<_Types ...>&)???
     constexpr inline _Tp& get(variant<_Types...>& __v)
                           ^~~
/usr/include/c++/8/variant:881:27: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:890:28: note: candidate: ???template<class _Tp, class ... _Types> constexpr _Tp&& std::get(std::variant<_Types ...>&&)???
     constexpr inline _Tp&& get(variant<_Types...>&& __v)
                            ^~~
/usr/include/c++/8/variant:890:28: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:900:33: note: candidate: ???template<class _Tp, class ... _Types> constexpr const _Tp& std::get(const std::variant<_Types ...>&)???
     constexpr inline const _Tp& get(const variant<_Types...>& __v)
                                 ^~~
/usr/include/c++/8/variant:900:33: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:909:34: note: candidate: ???template<class _Tp, class ... _Types> constexpr const _Tp&& std::get(const std::variant<_Types ...>&&)???
     constexpr inline const _Tp&& get(const variant<_Types...>&& __v)
                                  ^~~
/usr/include/c++/8/variant:909:34: note:   template argument deduction/substitution failed:
/usr/include/c++/8/variant:1385:55: error: ???const class boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? has no member named ???index???
       auto __func_ptr = __vtable._M_access(__variants.index()...);
                                            ~~~~~~~~~~~^~~~~
In file included from ../libs/serialization/test/test_tools.hpp:159,
                 from ../libs/serialization/test/test_variant.cpp:45:
../libs/serialization/test/test_variant.cpp: In instantiation of ???bool test_type(const Variant&) [with Variant = boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >]???:
../libs/serialization/test/test_variant.cpp:173:17:   required from here
../libs/serialization/test/test_variant.cpp:131:30: error: could not convert ???std::visit<are_equal, const boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >&, boost::variant<bool, int, float, double, const A*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >&>(are_equal{boost::static_visitor<bool>{boost::detail::is_static_visitor_tag()}}, (* & v), vx)??? from ???void??? to ???bool???
             BOOST_CHECK(visit(are_equal(), v, vx));
../boost/core/lightweight_test.hpp:533:107: note: in definition of macro ???BOOST_TEST???
 #define BOOST_TEST(expr) ( ::boost::detail::test_impl(#expr, __FILE__, __LINE__, BOOST_CURRENT_FUNCTION, (expr)? true: false) )
                                                                                                           ^~~~
../libs/serialization/test/test_variant.cpp:131:13: note: in expansion of macro ???BOOST_CHECK???
             BOOST_CHECK(visit(are_equal(), v, vx));
             ^~~~~~~~~~~
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant: In instantiation of ???constexpr decltype(auto) std::visit(_Visitor&&, _Variants&& ...) [with _Visitor = are_equal; _Variants = {const boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >&, boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >&}]???:
../libs/serialization/test/test_variant.cpp:131:13:   required from ???bool test_type(const Variant&) [with Variant = boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >]???
../libs/serialization/test/test_variant.cpp:146:14:   required from ???void test(Variant&) [with Variant = boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >]???
../libs/serialization/test/test_variant.cpp:170:11:   required from here
/usr/include/c++/8/variant:1375:23: error: ???const class boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? has no member named ???valueless_by_exception???
       if ((__variants.valueless_by_exception() || ...))
            ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/8/variant:1380:17: error: no matching function for call to ???get<0>(const boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >&)???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:216:5: note: candidate: ???template<unsigned int _Int, class _Tp1, class _Tp2> constexpr typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& std::get(std::pair<_Tp1, _Tp2>&)???
     get(std::pair<_Tp1, _Tp2>& __in) noexcept
     ^~~
/usr/include/c++/8/utility:216:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::pair<_Tp1, _Tp2>??? and ???const boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:221:5: note: candidate: ???template<unsigned int _Int, class _Tp1, class _Tp2> constexpr typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&& std::get(std::pair<_Tp1, _Tp2>&&)???
     get(std::pair<_Tp1, _Tp2>&& __in) noexcept
     ^~~
/usr/include/c++/8/utility:221:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::pair<_Tp1, _Tp2>??? and ???const boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:226:5: note: candidate: ???template<unsigned int _Int, class _Tp1, class _Tp2> constexpr const typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& std::get(const std::pair<_Tp1, _Tp2>&)???
     get(const std::pair<_Tp1, _Tp2>& __in) noexcept
     ^~~
/usr/include/c++/8/utility:226:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::pair<_Tp1, _Tp2>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:231:5: note: candidate: ???template<unsigned int _Int, class _Tp1, class _Tp2> constexpr const typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&& std::get(const std::pair<_Tp1, _Tp2>&&)???
     get(const std::pair<_Tp1, _Tp2>&& __in) noexcept
     ^~~
/usr/include/c++/8/utility:231:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::pair<_Tp1, _Tp2>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:60,
                 from ../boost/math/tools/config.hpp:215,
                 from ../boost/math/special_functions/next.hpp:13,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/utility:240:5: note: candidate: ???template<class _Tp, class _Up> constexpr _Tp& std::get(std::pair<_T1, _T2>&)???
     get(pair<_Tp, _Up>& __p) noexcept
     ^~~
/usr/include/c++/8/utility:240:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:245:5: note: candidate: ???template<class _Tp, class _Up> constexpr const _Tp& std::get(const std::pair<_T1, _T2>&)???
     get(const pair<_Tp, _Up>& __p) noexcept
     ^~~
/usr/include/c++/8/utility:245:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:250:5: note: candidate: ???template<class _Tp, class _Up> constexpr _Tp&& std::get(std::pair<_T1, _T2>&&)???
     get(pair<_Tp, _Up>&& __p) noexcept
     ^~~
/usr/include/c++/8/utility:250:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:255:5: note: candidate: ???template<class _Tp, class _Up> constexpr const _Tp&& std::get(const std::pair<_T1, _T2>&&)???
     get(const pair<_Tp, _Up>&& __p) noexcept
     ^~~
/usr/include/c++/8/utility:255:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:260:5: note: candidate: ???template<class _Tp, class _Up> constexpr _Tp& std::get(std::pair<_Up, _Tp>&)???
     get(pair<_Up, _Tp>& __p) noexcept
     ^~~
/usr/include/c++/8/utility:260:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:265:5: note: candidate: ???template<class _Tp, class _Up> constexpr const _Tp& std::get(const std::pair<_Up, _Tp>&)???
     get(const pair<_Up, _Tp>& __p) noexcept
     ^~~
/usr/include/c++/8/utility:265:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:270:5: note: candidate: ???template<class _Tp, class _Up> constexpr _Tp&& std::get(std::pair<_Up, _Tp>&&)???
     get(pair<_Up, _Tp>&& __p) noexcept
     ^~~
/usr/include/c++/8/utility:270:5: note:   template argument deduction/substitution failed:
/usr/include/c++/8/utility:275:5: note: candidate: ???template<class _Tp, class _Up> constexpr const _Tp&& std::get(const std::pair<_Up, _Tp>&&)???
     get(const pair<_Up, _Tp>&& __p) noexcept
     ^~~
/usr/include/c++/8/utility:275:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/8/tuple:39,
                 from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/array:307:5: note: candidate: ???template<unsigned int _Int, class _Tp, unsigned int _Nm> constexpr _Tp& std::get(std::array<_Tp, _Nm>&)???
     get(array<_Tp, _Nm>& __arr) noexcept
     ^~~
/usr/include/c++/8/array:307:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::array<_Tp, _Nm>??? and ???const boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/tuple:39,
                 from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/array:316:5: note: candidate: ???template<unsigned int _Int, class _Tp, unsigned int _Nm> constexpr _Tp&& std::get(std::array<_Tp, _Nm>&&)???
     get(array<_Tp, _Nm>&& __arr) noexcept
     ^~~
/usr/include/c++/8/array:316:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::array<_Tp, _Nm>??? and ???const boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/tuple:39,
                 from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/array:324:5: note: candidate: ???template<unsigned int _Int, class _Tp, unsigned int _Nm> constexpr const _Tp& std::get(const std::array<_Tp, _Nm>&)???
     get(const array<_Tp, _Nm>& __arr) noexcept
     ^~~
/usr/include/c++/8/array:324:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::array<_Tp, _Nm>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8/tuple:39,
                 from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/array:333:5: note: candidate: ???template<unsigned int _Int, class _Tp, unsigned int _Nm> constexpr const _Tp&& std::get(const std::array<_Tp, _Nm>&&)???
     get(const array<_Tp, _Nm>&& __arr) noexcept
     ^~~
/usr/include/c++/8/array:333:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   ???const boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? is not derived from ???const std::array<_Tp, _Nm>???
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/serialization/test/test_variant.cpp:28:
/usr/include/c++/8/tuple:1314:5: note: candidate: ???template<unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_Elements ...> >& std::get(std::tuple<_Elements ...>&)???
     get(tuple<_Elements...>& __t) noexcept
     ^~~
/usr/include/c++/8/tuple:1314:5: note:   template argument deduction/substitution failed:
In file included from ../boost/serialization/variant.hpp:51,
                 from ../libs/serialization/test/test_variant.cpp:161:
/usr/include/c++/8/variant:1380:17: note:   types ???std::tuple<_Elements ...>??? and ???const boost::variant<bool, int, float, double, A, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >??? have incompatible cv-qualifiers
      std::get<0>(std::forward<_Variants>(__variants))...));
      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/math/tools/tuple.hpp:62,
                 from ../boost/math/policies/error_handling.hpp:15,
                 from ../boost/math/special_functions/next.hpp:19,
                 from ../libs/ser...

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