Wrap Handler in boost::protect. For lambda use boost::lambda::protect

bind(&Test2<Handler_t>, boost::protect(Handler))();

Sorry, but this does not work. 1>d:\projekte\libs\boost_1_35\build\x86\include\boost-1_35\boost\bind.hpp(232) : error C2664: 'void (Handler_t)' : cannot convert parameter 1 from 'boost::_bi::protected_bind_t<F>' to 'boost::_bi::bind_t<R,F,L>' 1> with 1> [ 1> Handler_t=boost::_bi::bind_t<void,void (__cdecl *)(int),boost::_bi::list1<boost::_bi::value<int>>> 1> ] 1> and 1> [ 1> F=boost::_bi::bind_t<void,void (__cdecl *)(int),boost::_bi::list1<boost::_bi::value<int>>> 1> ] 1> and 1> [ 1> R=void, 1> F=void (__cdecl *)(int), 1> L=boost::_bi::list1<boost::_bi::value<int>> 1> ] 1> No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called 1> d:\projekte\libs\boost_1_35\build\x86\include\boost-1_35\boost\bind\bind_template.hpp(20) : see reference to function template instantiation 'void boost::_bi::list1<A1>::operator ()<void(__cdecl *)(Handler_t),boost::_bi::list0>(boost::_bi::type<T>,F &,A &,int)' being compiled 1> with 1> [ 1> A1=boost::_bi::value<boost::_bi::protected_bind_t<boost::_bi::bind_t<void,void (__cdecl *)(int),boost::_bi::list1<boost::_bi::value<int>>>>>, 1> Handler_t=boost::_bi::bind_t<void,void (__cdecl *)(int),boost::_bi::list1<boost::_bi::value<int>>>, 1> T=void, 1> F=void (__cdecl *)(boost::_bi::bind_t<void,void (__cdecl *)(int),boost::_bi::list1<boost::_bi::value<int>>>), 1> A=boost::_bi::list0 1> ] 1> d:\projekte\libs\boost_1_35\build\x86\include\boost-1_35\boost\bind\bind_template.hpp(18) : while compiling class template member function 'void boost::_bi::bind_t<R,F,L>::operator ()(void)' 1> with 1> [ 1> R=void, 1> F=void (__cdecl *)(boost::_bi::bind_t<void,void (__cdecl *)(int),boost::_bi::list1<boost::_bi::value<int>>>), 1> L=boost::_bi::list1<boost::_bi::value<boost::_bi::protected_bind_t<boost::_bi::bind_t<void,void (__cdecl *)(int),boost::_bi::list1<boost::_bi::value<int>>>>>> 1> ] 1> d:\projekte\test2\main.cpp(14) : see reference to class template instantiation 'boost::_bi::bind_t<R,F,L>' being compiled 1> with 1> [ 1> R=void, 1> F=void (__cdecl *)(boost::_bi::bind_t<void,void (__cdecl *)(int),boost::_bi::list1<boost::_bi::value<int>>>), 1> L=boost::_bi::list1<boost::_bi::value<boost::_bi::protected_bind_t<boost::_bi::bind_t<void,void (__cdecl *)(int),boost::_bi::list1<boost::_bi::value<int>>>>>> 1> ] 1> d:\projekte\test2\main.cpp(23) : see reference to function template instantiation 'void Test1<boost::_bi::bind_t<R,F,L>>(Handler_t)' being compiled 1> with 1> [ 1> R=void, 1> F=void (__cdecl *)(int), 1> L=boost::_bi::list1<boost::_bi::value<int>>, 1> Handler_t=boost::_bi::bind_t<void,void (__cdecl *)(int),boost::_bi::list1<boost::_bi::value<int>>> 1> ]