CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY
    CMAKE_INSTALL_DATAROOTDIR
    CMAKE_INSTALL_LIBEXECDIR
    CMAKE_INSTALL_OLDINCLUDEDIR
    CMAKE_INSTALL_SBINDIR


In file included from /home/conan/w/cci_PR-4017/.conan/data/mailio/0.20.0/_/_/build/b261e76eb94e2c16b912a497e22e380272179c96/source_subfolder/src/imap.cpp:27:0:
/home/conan/w/cci_PR-4017/.conan/data/mailio/0.20.0/_/_/build/b261e76eb94e2c16b912a497e22e380272179c96/source_subfolder/include/mailio/imap.hpp:19:20: fatal error: optional: No such file or directory
compilation terminated.
make[2]: *** [source_subfolder/CMakeFiles/mailio.dir/src/imap.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
In file included from /home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/eae4528807459ec8a9a2603417e4a87ef3ed61de/include/boost/date_time/local_time/local_time.hpp:15:0,
                 from /home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/eae4528807459ec8a9a2603417e4a87ef3ed61de/include/boost/date_time.hpp:15,
                 from /home/conan/w/cci_PR-4017/.conan/data/mailio/0.20.0/_/_/build/b261e76eb94e2c16b912a497e22e380272179c96/source_subfolder/include/mailio/message.hpp:24,
                 from /home/conan/w/cci_PR-4017/.conan/data/mailio/0.20.0/_/_/build/b261e76eb94e2c16b912a497e22e380272179c96/source_subfolder/src/message.cpp:37:
/home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/eae4528807459ec8a9a2603417e4a87ef3ed61de/include/boost/date_time/local_time/local_time_io.hpp: In instantiation of ‘std::basic_istream<_CharT, _Traits>& boost::local_time::operator>>(std::basic_istream<_CharT, _Traits>&, boost::local_time::local_date_time&) [with CharT = char; Traits = std::char_traits<char>; boost::local_time::local_date_time = boost::local_time::local_date_time_base<>]’:
/home/conan/w/cci_PR-4017/.conan/data/mailio/0.20.0/_/_/build/b261e76eb94e2c16b912a497e22e380272179c96/source_subfolder/src/message.cpp:1288:19:   required from here
/home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/eae4528807459ec8a9a2603417e4a87ef3ed61de/include/boost/date_time/local_time/local_time_io.hpp:76:41:   in constexpr expansion of ‘pt.boost::posix_time::ptime::ptime((boost::date_time::special_values)0u)’
/home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/eae4528807459ec8a9a2603417e4a87ef3ed61de/include/boost/date_time/posix_time/ptime.hpp:57:58:   in constexpr expansion of ‘((boost::posix_time::ptime*)this)->boost::posix_time::ptime::<anonymous>.boost::date_time::base_time<T, time_system>::base_time<boost::posix_time::ptime, boost::date_time::counted_time_system<boost::date_time::counted_time_rep<boost::posix_time::millisec_posix_time_system_config> > >(((boost::date_time::special_values)sv))’
/home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/eae4528807459ec8a9a2603417e4a87ef3ed61de/include/boost/date_time/time.hpp:69:38:   in constexpr expansion of ‘boost::date_time::counted_time_system<time_rep>::get_time_rep<boost::date_time::counted_time_rep<boost::posix_time::millisec_posix_time_system_config> >(sv)’
/home/conan/w/cci_PR-4017/.conan/data/boost/1.75.0/_/_/package/eae4528807459ec8a9a2603417e4a87ef3ed61de/include/boost/date_time/local_time/local_time_io.hpp:76:41: internal compiler error: Segmentation fault
         utc_time_type pt(not_a_date_time); 
                                         ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
make[2]: *** [source_subfolder/CMakeFiles/mailio.dir/src/message.cpp.o] Error 1
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/b261e76eb94e2c16b912a497e22e380272179c96
mailio/0.20.0: ERROR: Package 'b261e76eb94e2c16b912a497e22e380272179c96' build failed
mailio/0.20.0: WARN: Build folder /home/conan/w/cci_PR-4017/.conan/data/mailio/0.20.0/_/_/build/b261e76eb94e2c16b912a497e22e380272179c96
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/b261e76eb94e2c16b912a497e22e380272179c96/build_subfolder' '--' '-j3'