// deallocated the memory here.
detail::binder2<Handler, boost::system::error_code, std::size_t>
handler(o->handler_, o->ec_, o->bytes_transferred_);
// deallocated the memory here.
detail::binder2<Handler, boost::system::error_code, std::size_t>
handler(o->handler_, o->ec_, o->bytes_transferred_);