id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc 4227,operator safe bool,Domagoj Šarić,Fernando Cacciola,See https://svn.boost.org/trac/boost/ticket/4226,Bugs,closed,Boost 1.56.0,optional,Boost 1.44.0,Optimization,fixed,,