Return codes from minions are not correctly handled. Executing the following command on the salt master

root@xxx:~# salt 'salt-master' cmd.run '/bin/false'
salt-master:
ERROR: Minions returned with non-zero exit code
root@xxx:~# echo $?
11

correctly reports the failure.
Executing the same command with the saltstack plugin results in a SUCCESSful build, instead of a FAILURE.