fails:Open3.popen3 executes a process with a pipe to read stdout
fails:Open3.popen3 executes a process with a pipe to read stderr
fails:Open3.popen3 executes a process with a pipe to write stdin
fails:Open3.popen3 returns in, out, err and a thread waiting the process
fails:Open3.popen3 needs to be reviewed for spec completeness
