id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc 5096,display_expr is noncopyable,Christopher Schmidt,Eric Niebler,proto::functional::display_expr is not copyable. This can trigger hard errors inside Fusion when being passed to fusion::for_each as a functor because Fusion may expect functors to be copyable.,Bugs,closed,To Be Determined,proto,Boost Development Trunk,Problem,fixed,,