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In file included from /home/conan/w/cci_PR-4017/.conan/data/mailio/0.20.0/_/_/build/cd1cc1a1454c281bbdb89b2d0a0c6ff15051d2b6/source_subfolder/src/imap.cpp:20:
In file included from /home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/f9b63911ff837f630a5f0c8c5f143193cdca365e/include/boost/algorithm/string.hpp:23:
In file included from /home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/f9b63911ff837f630a5f0c8c5f143193cdca365e/include/boost/algorithm/string/split.hpp:16:
In file included from /home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/f9b63911ff837f630a5f0c8c5f143193cdca365e/include/boost/algorithm/string/iter_find.hpp:27:
In file included from /home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/f9b63911ff837f630a5f0c8c5f143193cdca365e/include/boost/algorithm/string/find_iterator.hpp:24:
In file included from /home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/f9b63911ff837f630a5f0c8c5f143193cdca365e/include/boost/algorithm/string/detail/find_iterator.hpp:18:
In file included from /home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/f9b63911ff837f630a5f0c8c5f143193cdca365e/include/boost/function.hpp:30:
In file included from /home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/f9b63911ff837f630a5f0c8c5f143193cdca365e/include/boost/function/detail/prologue.hpp:17:
In file included from /home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/f9b63911ff837f630a5f0c8c5f143193cdca365e/include/boost/function/function_base.hpp:21:
In file included from /home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/f9b63911ff837f630a5f0c8c5f143193cdca365e/include/boost/type_index.hpp:29:
In file included from /home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/f9b63911ff837f630a5f0c8c5f143193cdca365e/include/boost/type_index/stl_type_index.hpp:47:
In file included from /home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/f9b63911ff837f630a5f0c8c5f143193cdca365e/include/boost/container_hash/hash.hpp:115:
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:238:46: error: cannot cast 'std::variant<std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>' to its private base class 'std::__detail::__variant::_Variant_storage<false, std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>'
      return __get(std::in_place_index<_Np>, std::forward<_Variant>(__v)._M_u);
                                             ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:1198:35: note: in instantiation of function template specialization 'std::__detail::__variant::__get<2, std::variant<std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date> &>' requested here
      return __detail::__variant::__get<_Np>(__v);
                                  ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:744:14: note: in instantiation of function template specialization 'std::get<2, std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>' requested here
      return get<__detail::__variant::__index_of_v<_Tp, _Types...>>(__v);
             ^
/home/conan/w/cci_PR-4017/.conan/data/mailio/0.20.0/_/_/build/cd1cc1a1454c281bbdb89b2d0a0c6ff15051d2b6/source_subfolder/src/imap.cpp:97:66: note: in instantiation of function template specialization 'std::get<std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>' requested here
                imap_string = messages_range_list_to_string(std::get<list<messages_range_t>>(value));
                                                                 ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:883:7: note: constrained by private inheritance here
    : private __detail::__variant::_Variant_base<_Types...>,
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:238:74: error: '_M_u' is a private member of 'std::__detail::__variant::_Variant_storage<false, std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>'
      return __get(std::in_place_index<_Np>, std::forward<_Variant>(__v)._M_u);
                                                                         ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:883:7: note: constrained by private inheritance here
    : private __detail::__variant::_Variant_base<_Types...>,
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:363:34: note: member is declared here
      _Variadic_union<_Types...> _M_u;
                                 ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:238:46: error: cannot cast 'std::variant<std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>' to its private base class 'std::__detail::__variant::_Variant_storage<false, std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>'
      return __get(std::in_place_index<_Np>, std::forward<_Variant>(__v)._M_u);
                                             ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:1198:35: note: in instantiation of function template specialization 'std::__detail::__variant::__get<1, std::variant<std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date> &>' requested here
      return __detail::__variant::__get<_Np>(__v);
                                  ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:744:14: note: in instantiation of function template specialization 'std::get<1, std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>' requested here
      return get<__detail::__variant::__index_of_v<_Tp, _Types...>>(__v);
             ^
/home/conan/w/cci_PR-4017/.conan/data/mailio/0.20.0/_/_/build/cd1cc1a1454c281bbdb89b2d0a0c6ff15051d2b6/source_subfolder/src/imap.cpp:102:75: note: in instantiation of function template specialization 'std::get<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>' requested here
                imap_string = "SUBJECT " + QUOTED_STRING_SEPARATOR + std::get<string>(value) + QUOTED_STRING_SEPARATOR;
                                                                          ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:883:7: note: constrained by private inheritance here
    : private __detail::__variant::_Variant_base<_Types...>,
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:238:74: error: '_M_u' is a private member of 'std::__detail::__variant::_Variant_storage<false, std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>'
      return __get(std::in_place_index<_Np>, std::forward<_Variant>(__v)._M_u);
                                                                         ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:883:7: note: constrained by private inheritance here
    : private __detail::__variant::_Variant_base<_Types...>,
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:363:34: note: member is declared here
      _Variadic_union<_Types...> _M_u;
                                 ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:238:46: error: cannot cast 'std::variant<std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>' to its private base class 'std::__detail::__variant::_Variant_storage<false, std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>'
      return __get(std::in_place_index<_Np>, std::forward<_Variant>(__v)._M_u);
                                             ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:1198:35: note: in instantiation of function template specialization 'std::__detail::__variant::__get<3, std::variant<std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date> &>' requested here
      return __detail::__variant::__get<_Np>(__v);
                                  ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:744:14: note: in instantiation of function template specialization 'std::get<3, std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>' requested here
      return get<__detail::__variant::__index_of_v<_Tp, _Types...>>(__v);
             ^
/home/conan/w/cci_PR-4017/.conan/data/mailio/0.20.0/_/_/build/cd1cc1a1454c281bbdb89b2d0a0c6ff15051d2b6/source_subfolder/src/imap.cpp:114:68: note: in instantiation of function template specialization 'std::get<boost::gregorian::date, std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>' requested here
                imap_string = "BEFORE " + imap_date_to_string(std::get<boost::gregorian::date>(value));
                                                                   ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:883:7: note: constrained by private inheritance here
    : private __detail::__variant::_Variant_base<_Types...>,
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:238:74: error: '_M_u' is a private member of 'std::__detail::__variant::_Variant_storage<false, std::monostate, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<std::pair<unsigned long, std::optional<unsigned long> >, std::allocator<std::pair<unsigned long, std::optional<unsigned long> > > >, boost::gregorian::date>'
      return __get(std::in_place_index<_Np>, std::forward<_Variant>(__v)._M_u);
                                                                         ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:883:7: note: constrained by private inheritance here
    : private __detail::__variant::_Variant_base<_Types...>,
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/variant:363:34: note: member is declared here
      _Variadic_union<_Types...> _M_u;
                                 ^
6 errors generated.
make[2]: *** [source_subfolder/CMakeFiles/mailio.dir/src/imap.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [source_subfolder/CMakeFiles/mailio.dir/all] Error 2
make: *** [all] Error 2
mailio/0.20.0: WARN: Build folder is dirty, removing it: /home/conan/w/cci_PR-4017/.conan/data/mailio/0.20.0/_/_/build/cd1cc1a1454c281bbdb89b2d0a0c6ff15051d2b6
mailio/0.20.0: ERROR: Package 'cd1cc1a1454c281bbdb89b2d0a0c6ff15051d2b6' build failed
mailio/0.20.0: WARN: Build folder /home/conan/w/cci_PR-4017/.conan/data/mailio/0.20.0/_/_/build/cd1cc1a1454c281bbdb89b2d0a0c6ff15051d2b6
ERROR: mailio/0.20.0: Error in build() method, line 68
	cmake.build()
	ConanException: Error 2 while executing cmake --build '/home/conan/w/cci_PR-4017/.conan/data/mailio/0.20.0/_/_/build/cd1cc1a1454c281bbdb89b2d0a0c6ff15051d2b6/build_subfolder' '--' '-j3'