Arvados

(Also noticed that its diagnostic message goes to stdout instead of stderr.) (this part seems to have been user error)

Desired:

$ echo foo | crunchstat -cgroup-root=/sys/fs/cgroup cat 2>/dev/null
foo
$ cat /tmp/stderr
crunchstat: Running [cat]
$

Observed:

$ echo foo | crunchstat -cgroup-root=/sys/fs/cgroup cat 2>/tmp/stderr
$ cat /tmp/stderr
crunchstat: Running [cat]
$