121     bp::pstream os2 = std::move(os);  variable
123     os2 << i << std::endl;
124     os2 << std::endl;
146     bp::opstream os2 = std::move(os);  variable
148     os2 << i << std::endl;
149     os2 << std::endl;
171     bp::pstream os2;  variable
172     os2 = std::move(os);
175     os2 << i << std::endl;
176     os2 << std::endl;
198     bp::opstream os2;  variable
199     os2 = std::move(os);
202     os2 << i << std::endl;
203     os2 << std::endl;
287         bp::opstream os2(std::move(p2));
289         os2.pipe(os1.pipe());