Comment 6 for bug 1427600

Ubuntu 15.10, apport 2.19.1-0ubuntu5. Trying to unpack to a non-existing directory. Get

     Traceback (most recent call last):
      File "/usr/bin/apport-unpack", line 73, in <module>
        pr.extract_keys(f, bin_keys, dir)
      File "/usr/lib/python3/dist-packages/problem_report.py", line 253, in extract_keys
        [item for item, element in b64_block.items() if element is False])

    $ grep UserGroups /var/crash/_usr_bin_hhvm.33.crash | cat -A
    UserGroups: $
    $