id summary reporter owner description type status milestone component version severity resolution keywords cc 9693 error C2039: 'proto_tag' : is not a member of 'boost::phoenix::custom_terminal,void>' Joseph Southwell Andrey Semashev "Some time in the last month the following statement stopped compiling with modular-boost/master on visual studio 2013. The first error is... error C2039: 'proto_tag' : is not a member of 'boost::phoenix::custom_terminal,void>' I have attached a build.log and an example cpp file. I switched to develop and got the same result. I am new to git so not sure I did it right. git checkout develop git pull --recurse-submodules .\b2 --toolset=msvc-12.0 " Bugs closed To Be Determined log Boost Development Trunk Regression fixed