SMART test crashes on unexpected output from smartctl

[Rod Smith]

I got the following output in a recent test:

</comment>
    </question>
    <question name="disk/smart_sda">
      <answer type="multiple_choice">fail</answer>
      <answer_choices>
        <value type="str">none</value>
        <value type="str">pass</value>
        <value type="str">fail</value>
        <value type="str">skip</value>
      </answer_choices>
      <comment>INFO Starting SMART self-test on /dev/sda
Traceback (most recent call last):
  File "/tmp/nest-arzbp__8.bd85c40ab6e98dade1a6cd3406bf13a1e1d38c18deeb7ebaa3f2895ca4fd8f71/disk_smart", line 321, in &lt;module&gt;
    sys.exit(main())
  File "/tmp/nest-arzbp__8.bd85c40ab6e98dade1a6cd3406bf13a1e1d38c18deeb7ebaa3f2895ca4fd8f71/disk_smart", line 305, in main
    status, returncode = poll_for_status(args, disk, previous_entries)
TypeError: 'int' object is not iterable
</comment>

I think I see the cause and will try to fix it while I've got the disks that are throwing this error.

[Daniel Manrique (roadmr)]

A fix was merged here:

https://code.launchpad.net/~rodsmith/checkbox/smart-increase-timeout/+merge/252634

Since apparently that timeout increase makes the problem go away, I'll set this to Fix Released. If it appears again, please re-file. (BTW we have to triage these appropriately, partly my fault: this belonged in plainbox-provider-checkbox).