Description of problem:
When trying to use yum remove foo[double tab for completion]

Version-Release number of selected component:
yum-3.4.3-119.fc20

Additional info:
reporter:       libreport-2.1.9
cmdline:        /usr/bin/python -t /usr/share/yum-cli/completion-helper.py -d 0 -C list installed kernel-libre
executable:     /usr/share/yum-cli/completion-helper.py
kernel:         3.11.9-libre.300.fc20.gnu.x86_64
runlevel:       N 5
type:           Python
uid:            1000

Truncated backtrace:
yumRepo.py:706:_dirSetupMkdir_p:RepoError: Error making cache directory: /var/cache/yum/x86_64/20/fedora-source error was: [Errno 13] Permission denied: '/var/cache/yum/x86_64/20/fedora-source'

Traceback (most recent call last):
  File "/usr/share/yum-cli/completion-helper.py", line 95, in <module>
    main(sys.argv[1:])
  File "/usr/share/yum-cli/completion-helper.py", line 83, in main
    base.getOptionsConfig(args)
  File "/usr/share/yum-cli/cli.py", line 351, in getOptionsConfig
    self.parseCommands() # before we return check over the base command + args
  File "/usr/share/yum-cli/cli.py", line 408, in parseCommands
    if not os.path.exists(repo.metadata_cookie):
  File "/usr/lib/python2.7/site-packages/yum/yumRepo.py", line 778, in <lambda>
    metadata_cookie = property(lambda self: self._dirGetAttr('metadata_cookie'))
  File "/usr/lib/python2.7/site-packages/yum/yumRepo.py", line 750, in _dirGetAttr
    self.dirSetup()
  File "/usr/lib/python2.7/site-packages/yum/yumRepo.py", line 729, in dirSetup
    self._dirSetupMkdir_p(dir)
  File "/usr/lib/python2.7/site-packages/yum/yumRepo.py", line 706, in _dirSetupMkdir_p
    raise Errors.RepoError, msg
RepoError: Error making cache directory: /var/cache/yum/x86_64/20/fedora-source error was: [Errno 13] Permission denied: '/var/cache/yum/x86_64/20/fedora-source'

Local variables in innermost frame:
msg: "Error making cache directory: /var/cache/yum/x86_64/20/fedora-source error was: [Errno 13] Permission denied: '/var/cache/yum/x86_64/20/fedora-source'"
dpath: '/var/cache/yum/x86_64/20/fedora-source'
self: <yum.yumRepo.YumRepository object at 0x1079cd0>
e: OSError(13, 'Permission denied')