I installed VS2013, compiled boost trunk r86347 (no apparent errors but I didn't do a full log check) I found a compiler crash if you do (full repro case): #include <boost/thread/synchronized_value.hpp> #include <boost/property_tree/ptree.hpp> boost::synchronized_value<boost::property_tree::ptree> tree; That's the whole code of the file. Which triggers: 1> config.cpp 1>e:\projects\sdk\boost\boost\include\boost-1_55\boost\thread\synchronized_value.hpp(401): fatal error C1001: An internal error has occurred in the compiler. 1> (compiler file 'f:\dd\vctools\compiler\cxxfe\sl\p1\c\types.c', line 12852) 1> To work around this problem, try simplifying or changing the program near the locations listed above. 1> Please choose the Technical Support command on the Visual C++ 1> Help menu, or open the Technical Support help file for more information 1> e:\projects\games\netrush\netrush_projects\projects\netrush\system\core\config.cpp(151) : see reference to class template instantiation 'boost::synchronized_value<boost::property_tree::ptree,boost::mutex>' being compiled Build has been canceled. It might be related to a compiler crash I reported there: http://connect.microsoft.com/VisualStudio/feedback/details/802157/compiler-c... I'm not sure if it would be a good idea to make this a test. I'll replace this code by a separate mutex and will report if I find other problems. Note that I didn't have this problem with a previous boost trunk release from july (can't find the specific revision right now), compiled with the RC. W<http://connect.microsoft.com/VisualStudio/feedback/details/802157/compiler-crash-mixing-boost-synchronized-value-and-boost-property-tree>hen I got VS2013 RTM I compiled my project with boost trunk from july compiled by the RC, it worked as before, so I don't know if the change was in boost or the compiler or both.