Problem with latest VS2017 update

[Kojoley]

VS2017 version: 15.5.1
cl version: 19.12.25830.2

Fusion tests result in:

sequence\as_map.cpp(53): error C2668: 'boost::fusion::map<T,boost::fusion::pair<double,std::string>>::map': ambiguous call to overloaded function
        with
        [
            T=boost::fusion::pair<int,char>
        ]
..\..\..\boost/fusion/container/map/map.hpp(99): note: could be 'boost::fusion::map<T,boost::fusion::pair<double,std::string>>::map<boost::fusion::vector<T,boost::fusion::pair<First,const char (&)[4]>>,>(boost::fusion::vector<T,boost::fusion::pair<First,const char (&)[4]>> &&)'
        with
        [
            T=boost::fusion::pair<int,char>,
            First=double
        ]
..\..\..\boost/fusion/container/map/map.hpp(92): note: or       'boost::fusion::map<T,boost::fusion::pair<double,std::string>>::map<boost::fusion::vector<T,boost::fusion::pair<First,const char (&)[4]>>,>(const boost::fusion::vector<T,boost::fusion::pair<First,const char (&)[4]>> &)'
        with
        [
            T=boost::fusion::pair<int,char>,
            First=double
        ]
..\..\..\boost/fusion/container/map/map.hpp(86): note: or       'boost::fusion::map<T,boost::fusion::pair<double,std::string>>::map<boost::fusion::vector<T,boost::fusion::pair<First,const char (&)[4]>>>(Sequence &&,boost::fusion::detail::enabler_)'
        with
        [
            T=boost::fusion::pair<int,char>,
            First=double,
            Sequence=boost::fusion::vector<boost::fusion::pair<int,char>,boost::fusion::pair<double,const char (&)[4]>>
        ]
..\..\..\boost/fusion/container/map/map.hpp(79): note: or       'boost::fusion::map<T,boost::fusion::pair<double,std::string>>::map<boost::fusion::vector<T,boost::fusion::pair<First,const char (&)[4]>>>(Sequence &,boost::fusion::detail::enabler_)'
        with
        [
            T=boost::fusion::pair<int,char>,
            First=double,
            Sequence=boost::fusion::vector<boost::fusion::pair<int,char>,boost::fusion::pair<double,const char (&)[4]>>
        ]
..\..\..\boost/fusion/container/map/map.hpp(72): note: or       'boost::fusion::map<T,boost::fusion::pair<double,std::string>>::map<boost::fusion::vector<T,boost::fusion::pair<First,const char (&)[4]>>>(const Sequence &,boost::fusion::detail::enabler_)'
        with
        [
            T=boost::fusion::pair<int,char>,
            First=double,
            Sequence=boost::fusion::vector<boost::fusion::pair<int,char>,boost::fusion::pair<double,const char (&)[4]>>
        ]
sequence\as_map.cpp(53): note: while trying to match the argument list '(boost::fusion::vector<T,boost::fusion::pair<First,const char (&)[4]>>)'
        with
        [
            T=boost::fusion::pair<int,char>,
            First=double
        ]

sequence\as_map_assoc.cpp(64): error C2668: 'boost::fusion::map<T,boost::fusion::pair<char,char>>::map': ambiguous call to overloaded function
        with
        [
            T=boost::fusion::pair<int,int>
        ]
..\..\..\boost/fusion/container/map/map.hpp(99): note: could be 'boost::fusion::map<T,boost::fusion::pair<char,char>>::map<boost::fusion::set<int,char>,>(First &&)'
        with
        [
            T=boost::fusion::pair<int,int>,
            First=boost::fusion::set<int,char>
        ]
..\..\..\boost/fusion/container/map/map.hpp(92): note: or       'boost::fusion::map<T,boost::fusion::pair<char,char>>::map<boost::fusion::set<int,char>,>(const First &)'
        with
        [
            T=boost::fusion::pair<int,int>,
            First=boost::fusion::set<int,char>
        ]
..\..\..\boost/fusion/container/map/map.hpp(86): note: or       'boost::fusion::map<T,boost::fusion::pair<char,char>>::map<boost::fusion::set<int,char>>(Sequence &&,boost::fusion::detail::enabler_)'
        with
        [
            T=boost::fusion::pair<int,int>,
            Sequence=boost::fusion::set<int,char>
        ]
..\..\..\boost/fusion/container/map/map.hpp(79): note: or       'boost::fusion::map<T,boost::fusion::pair<char,char>>::map<boost::fusion::set<int,char>>(Sequence &,boost::fusion::detail::enabler_)'
        with
        [
            T=boost::fusion::pair<int,int>,
            Sequence=boost::fusion::set<int,char>
        ]
..\..\..\boost/fusion/container/map/map.hpp(72): note: or       'boost::fusion::map<T,boost::fusion::pair<char,char>>::map<boost::fusion::set<int,char>>(const Sequence &,boost::fusion::detail::enabler_)'
        with
        [
            T=boost::fusion::pair<int,int>,
            Sequence=boost::fusion::set<int,char>
        ]
sequence\as_map_assoc.cpp(64): note: while trying to match the argument list '(boost::fusion::set<int,char>)'

sequence\map_copy.cpp(45): error C2440: 'return': cannot convert from 'boost::fusion::map<boost::fusion::pair<k1,T>,boost::fusion::pair<k2,T>,boost::fusion::pair<k3,T>,boost::fusion::pair<k4,T>>' to 'boost::fusion::map<boost::fusion::pair<k1,double>,boost::fusion::pair<k2,double>,boost::fusion::pair<k3,double>,boost::fusion::pair<k4,double>>'
        with
        [
            T=int
        ]
sequence\map_copy.cpp(45): note: No constructor could take the source type, or constructor overload resolution was ambiguous

[Kojoley]

Appveyor have updated the VS2017 to 15.5.1 https://www.appveyor.com/updates/2017/12/12/ so if you trigger a new build you will get these errors.