StandardIO is a 'pure', non-seekable stream so Pos() and Size() have no meaning.
StandardIO will also never reach end-of-file.
ReadStdin blocks until an end-of-line is received, so you'll have to pipe something with an end-of-line in it instead of just 'hello'.
StandardIO will also never reach end-of-file.
ReadStdin blocks until an end-of-line is received, so you'll have to pipe something with an end-of-line in it instead of just 'hello'.