I'm getting these errors with MSVC12 on the current develop branch: compile-c-c++ bin.v2\libs\thread\build\msvc-12.0\debug\address-model-64\threading-multi\win32\thread.obj thread.cpp C:\src\boost\boost/type_traits/common_type.hpp(111) : fatal error C1001: An internal error has occurred in the compiler. (compiler file 'f:\dd\vctools\compiler\cxxfe\sl\p1\c\esumem.c', line 8636) To work around this problem, try simplifying or changing the program near the locations listed above. Please choose the Technical Support command on the Visual C++ Help menu, or open the Technical Support help file for more information C:\src\boost\boost/type_traits/common_type.hpp(133) : see reference to class template instantiation 'boost::type_traits_detail::common_type_impl<T1,T2>' being compiled with [ T1=int_least64_t , T2=int_least64_t ] C:\src\boost\boost/type_traits/common_type.hpp(139) : see reference to class template instantiation 'boost::type_traits_detail::common_type_decay_helper<T1,T2,__int64,__int64>' being compiled with [ T1=int_least64_t , T2=int_least64_t ] C:\src\boost\boost/chrono/duration.hpp(405) : see reference to class template instantiation 'boost::common_type<Rep1,Rep2>' being compiled with [ Rep1=int_least64_t , Rep2=int_least64_t ] C:\src\boost\boost/thread/win32/basic_timed_mutex.hpp(211) : see reference to class template instantiation 'boost::common_type<boost::chrono::system_clock::duration,boost::chrono::system_clock::duration>' being compiled call "C:\Users\Lastique\AppData\Local\Temp\b2_msvc_12.0_vcvarsall_x86_amd64.cmd"
nul cl /Zm800 -nologo @"bin.v2\libs\thread\build\msvc-12.0\debug\address-model-64\threading-multi\win32\thread.obj.rsp"
...failed compile-c-c++ bin.v2\libs\thread\build\msvc-12.0\debug\address-model-64\threading-multi\win32\thread.obj...