boost visual-studio-2015 boost-variant boost-signals2 cpp-netlib

'boost::detail::variant::visitation_impl': none of the 2 overloads could convert all the argument types

I'm not able to build two of my projects with Boost libraries 1.61.0 and Visual Studio 2015 Update 3.

These projects used to build fine for years with various combinations of Visual Studio and Boost versions, and I didn't change anything in my code except from updating Visual Studio and Boost libraries.

The error I get with both of these projects is:

'boost::detail::variant::visitation_impl': none of the 2 overloads could convert all the argument types

In both of these projects I don't use boost::variant directly from my code. In one case it looks like boost::variant is being used from boost::signals2 (which I also don't use directly from my code) and in the other case it looks like boost::variant is being used from Cpp-Netlib 0.11.2.

Here are the relevant parts of the output logs of these two projects:

1>d:\libraries\boost_1_61_0\boost\variant\detail\visitation_impl.hpp(267): error C2665: 'boost::detail::variant::visitation_impl': none of the 2 overloads could convert all the argument types
1>  d:\libraries\boost_1_61_0\boost\variant\detail\visitation_impl.hpp(201): note: could be 'void boost::detail::variant::visitation_impl<next_which,next_step,Visitor,VoidPtrCV,NoBackupFlag>(const int,const int,Visitor &,VoidPtrCV,boost::mpl::false_,NoBackupFlag,Which *,step0 *)'
1>          with
1>          [
1>              Visitor=boost::detail::variant::destroyer,
1>              VoidPtrCV=void *,
1>              NoBackupFlag=boost::variant<boost::shared_ptr<void>,boost::signals2::detail::foreign_void_shared_ptr,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::has_fallback_type_,
1>              Which=next_which,
1>              step0=next_step
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\detail\visitation_impl.hpp(183): note: or       'void boost::detail::variant::visitation_impl<next_which,next_step,Visitor,VoidPtrCV,NoBackupFlag>(int,int,Visitor &,VPCV,boost::mpl::true_,NBF,W *,S *)'
1>          with
1>          [
1>              Visitor=boost::detail::variant::destroyer,
1>              VoidPtrCV=void *,
1>              NoBackupFlag=boost::variant<boost::shared_ptr<void>,boost::signals2::detail::foreign_void_shared_ptr,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::has_fallback_type_,
1>              VPCV=void *,
1>              NBF=boost::variant<boost::shared_ptr<void>,boost::signals2::detail::foreign_void_shared_ptr,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::has_fallback_type_,
1>              W=next_which,
1>              S=next_step
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\detail\visitation_impl.hpp(267): note: while trying to match the argument list '(const int, const int, boost::detail::variant::destroyer, void *, is_apply_visitor_unrolled, boost::variant<boost::shared_ptr<void>,boost::signals2::detail::foreign_void_shared_ptr,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::has_fallback_type_, next_which *, next_step *)'
1>  d:\libraries\boost_1_61_0\boost\variant\variant.hpp(2326): note: see reference to function template instantiation 'void boost::detail::variant::visitation_impl<first_which,first_step,Visitor,VoidPtrCV,boost::variant<boost::shared_ptr<void>,boost::signals2::detail::foreign_void_shared_ptr,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::has_fallback_type_>(const int,const int,Visitor &,VoidPtrCV,boost::mpl::false_,NoBackupFlag,Which *,step0 *)' being compiled
1>          with
1>          [
1>              Visitor=boost::detail::variant::destroyer,
1>              VoidPtrCV=void *,
1>              NoBackupFlag=boost::variant<boost::shared_ptr<void>,boost::signals2::detail::foreign_void_shared_ptr,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::has_fallback_type_,
1>              Which=first_which,
1>              step0=first_step
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\variant.hpp(2337): note: see reference to function template instantiation 'void boost::variant<boost::shared_ptr<void>,boost::signals2::detail::foreign_void_shared_ptr,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::internal_apply_visitor_impl<Visitor,void*>(int,int,Visitor &,VoidPtrCV)' being compiled
1>          with
1>          [
1>              Visitor=boost::detail::variant::destroyer,
1>              VoidPtrCV=void *
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\variant.hpp(2335): note: see reference to function template instantiation 'void boost::variant<boost::shared_ptr<void>,boost::signals2::detail::foreign_void_shared_ptr,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::internal_apply_visitor_impl<Visitor,void*>(int,int,Visitor &,VoidPtrCV)' being compiled
1>          with
1>          [
1>              Visitor=boost::detail::variant::destroyer,
1>              VoidPtrCV=void *
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\variant.hpp(1345): note: see reference to function template instantiation 'void boost::variant<boost::shared_ptr<void>,boost::signals2::detail::foreign_void_shared_ptr,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::internal_apply_visitor<boost::detail::variant::destroyer>(Visitor &)' being compiled
1>          with
1>          [
1>              Visitor=boost::detail::variant::destroyer
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\variant.hpp(1345): note: see reference to function template instantiation 'void boost::variant<boost::shared_ptr<void>,boost::signals2::detail::foreign_void_shared_ptr,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::internal_apply_visitor<boost::detail::variant::destroyer>(Visitor &)' being compiled
1>          with
1>          [
1>              Visitor=boost::detail::variant::destroyer
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\variant.hpp(1343): note: while compiling class template member function 'void boost::variant<boost::shared_ptr<void>,boost::signals2::detail::foreign_void_shared_ptr,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::destroy_content(void) noexcept'
1>  d:\libraries\boost_1_61_0\boost\variant\variant.hpp(1352): note: see reference to function template instantiation 'void boost::variant<boost::shared_ptr<void>,boost::signals2::detail::foreign_void_shared_ptr,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::destroy_content(void) noexcept' being compiled
1>  d:\libraries\boost_1_61_0\boost\signals2\slot_base.hpp(47): note: see reference to class template instantiation 'boost::variant<boost::shared_ptr<void>,boost::signals2::detail::foreign_void_shared_ptr,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>' being compiled

1>d:\libraries\boost_1_61_0\boost\variant\detail\visitation_impl.hpp(267): error C2665: 'boost::detail::variant::visitation_impl': none of the 2 overloads could convert all the argument types
1>  d:\libraries\boost_1_61_0\boost\variant\detail\visitation_impl.hpp(201): note: could be 'void boost::detail::variant::visitation_impl<next_which,next_step,Visitor,VoidPtrCV,NoBackupFlag>(const int,const int,Visitor &,VoidPtrCV,boost::mpl::false_,NoBackupFlag,Which *,step0 *)'
1>          with
1>          [
1>              Visitor=boost::detail::variant::copy_into,
1>              VoidPtrCV=const void *,
1>              NoBackupFlag=boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::has_fallback_type_,
1>              Which=next_which,
1>              step0=next_step
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\detail\visitation_impl.hpp(183): note: or       'void boost::detail::variant::visitation_impl<next_which,next_step,Visitor,VoidPtrCV,NoBackupFlag>(int,int,Visitor &,VPCV,boost::mpl::true_,NBF,W *,S *)'
1>          with
1>          [
1>              Visitor=boost::detail::variant::copy_into,
1>              VoidPtrCV=const void *,
1>              NoBackupFlag=boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::has_fallback_type_,
1>              VPCV=const void *,
1>              NBF=boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::has_fallback_type_,
1>              W=next_which,
1>              S=next_step
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\detail\visitation_impl.hpp(267): note: while trying to match the argument list '(const int, const int, boost::detail::variant::copy_into, const void *, is_apply_visitor_unrolled, boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::has_fallback_type_, next_which *, next_step *)'
1>  d:\libraries\boost_1_61_0\boost\variant\variant.hpp(2326): note: see reference to function template instantiation 'void boost::detail::variant::visitation_impl<first_which,first_step,Visitor,VoidPtrCV,boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::has_fallback_type_>(const int,const int,Visitor &,VoidPtrCV,boost::mpl::false_,NoBackupFlag,Which *,step0 *)' being compiled
1>          with
1>          [
1>              Visitor=boost::detail::variant::copy_into,
1>              VoidPtrCV=const void *,
1>              NoBackupFlag=boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::has_fallback_type_,
1>              Which=first_which,
1>              step0=first_step
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\variant.hpp(2348): note: see reference to function template instantiation 'void boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::internal_apply_visitor_impl<Visitor,const void*>(int,int,Visitor &,VoidPtrCV)' being compiled
1>          with
1>          [
1>              Visitor=boost::detail::variant::copy_into,
1>              VoidPtrCV=const void *
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\variant.hpp(2346): note: see reference to function template instantiation 'void boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::internal_apply_visitor_impl<Visitor,const void*>(int,int,Visitor &,VoidPtrCV)' being compiled
1>          with
1>          [
1>              Visitor=boost::detail::variant::copy_into,
1>              VoidPtrCV=const void *
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\variant.hpp(1746): note: see reference to function template instantiation 'void boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::internal_apply_visitor<boost::detail::variant::copy_into>(Visitor &) const' being compiled
1>          with
1>          [
1>              Visitor=boost::detail::variant::copy_into
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\variant.hpp(1746): note: see reference to function template instantiation 'void boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::internal_apply_visitor<boost::detail::variant::copy_into>(Visitor &) const' being compiled
1>          with
1>          [
1>              Visitor=boost::detail::variant::copy_into
1>          ]
1>  d:\libraries\boost_1_61_0\boost\variant\variant.hpp(1742): note: while compiling class template member function 'boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::variant(const boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_> &)'
1>  d:\libraries\cpp-netlib-0.11.2-final\build\install\include\boost\network\protocol\http\message\directives\status.hpp(36): note: see reference to function template instantiation 'boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>::variant(const boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_> &)' being compiled
1>  d:\libraries\cpp-netlib-0.11.2-final\build\install\include\boost\network\protocol\http\message\directives\status.hpp(29): note: see reference to class template instantiation 'boost::variant<uint16_t,boost::shared_future<uint16_t>,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_,boost::detail::variant::void_>' being compiled

Is this a bug in the boost libraries?

Solution

It sounds like you have a broken Boost installation. Are you keeping multiple versions of Boost laying around? There are multiple examples of Boost 1.61.0 and Visual Studio 2015 update 3 working together successfully on the web, though this one does say there are some issues with the new SFINAE feature.

Try removing old Boost installations and make a clean install of Boost 1.61.0 from the Boost distribution.

It is also possible that Visual Studio was corrupted during the install or update, but I have seen fewer of those types of problems.