Bisect clang regression between 5.0 and trunk

[Teemperor]

Current clang/llvm from trunk doesn't compile boost anymore with our modulemap:

hile building module 'boost_modules_wrapper' imported from /home/teemperor/boost-compile/cms.cpp:2:
In file included from <module-includes>:326:
/home/teemperor/boost-compile/inc/boost/units/cmath.hpp:604:103: error: no member named 'radians' in namespace 'boost::units::si'
    return quantity<unit<plane_angle_dimension, homogeneous_system<System> >,Y>(acos(val.value())*si::radians);
                                                                                                  ~~~~^
/home/teemperor/boost-compile/inc/boost/units/cmath.hpp:622:103: error: no member named 'radians' in namespace 'boost::units::si'
    return quantity<unit<plane_angle_dimension, homogeneous_system<System> >,Y>(asin(val.value())*si::radians);
                                                                                                  ~~~~^
/home/teemperor/boost-compile/inc/boost/units/cmath.hpp:640:103: error: no member named 'radians' in namespace 'boost::units::si'
    return quantity<unit<plane_angle_dimension, homogeneous_system<System> >,Y>(atan(val.value())*si::radians);
                                                                                                  ~~~~^
/home/teemperor/boost-compile/inc/boost/units/cmath.hpp:659:113: error: no member named 'radians' in namespace 'boost::units::si'
    return quantity<unit<plane_angle_dimension, homogeneous_system<System> >, Y>(atan2(y.value(),x.value())*si::radians);
                                                                                                            ~~~~^
While building module 'boost_modules_wrapper' imported from /home/teemperor/boost-compile/cms.cpp:2:

We need to bisect the clang commits between 5.0 and now to see what commit broke this that we can fix it.

[vgvassilev]

Hey @yamaguchi1024, could you look into this problem. llvm-lab bisect could be very useful here.

[Teemperor]

r315402 is the reason it seems

[vgvassilev]

The discussion here may contain some information how to reproduce it...