id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
12121,Duplicate conflicting forward declaration of basic_string_ref,white@…,Andrey Semashev,"In Boost 1.61 Beta 1, a new error means to much forward declaration of basic_string_ref.

boost/log/utility/formatting_ostream.hpp:39:76: error: redefinition of default argument for 'class traits'
 template<typename charT, typename traits = std::char_traits<charT> > class basic_string_ref;

Its also declared in
boost/utility/string_ref_fwd.hpp
and
boost/utility/string_ref.hpp


Removing the fwd declaration in formatting_ostream.hpp:39 and all is working.

Boost 1.61.0 beta
gcc 5.3.0 (x86_64-win32-seh-rev0, Built by MinGW-W64 project)
",Bugs,closed,To Be Determined,log,Boost 1.61.0,Problem,fixed,,