Description of problem:
Problem was reported at the end of Fedora 20 install to hard disk

Version-Release number of selected component:
anaconda-20.25.15-1.fc20.x86_64

The following was filed automatically by anaconda:
anaconda 20.25.15-1 exception report
Traceback (most recent call first):
  File "/usr/lib64/python2.7/site-packages/pyanaconda/iutil.py", line 70, in _run_program
    program_log.info("Running... %s", " ".join(argv))
  File "/usr/lib64/python2.7/site-packages/pyanaconda/iutil.py", line 116, in execWithRedirect
    return _run_program(argv, stdin=stdin, stdout=stdout, root=root, env_prune=env_prune)[0]
  File "/usr/lib64/python2.7/site-packages/pyanaconda/network.py", line 932, in set_hostname
    iutil.execWithRedirect("hostnamectl", ["set-hostname", hn])
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/network.py", line 1203, in execute
    network.set_hostname(self.data.network.hostname)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/hubs/__init__.py", line 126, in _runSpoke
    action.execute()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/hubs/__init__.py", line 424, in _on_spoke_clicked
    self._runSpoke(spoke)
TypeError: sequence item 2: expected string, NoneType found

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda --liveinst --method=livecd:///dev/mapper/live-base
cmdline_file:   initrd=initrd0.img root=live:CDLABEL=Fedora-Live-Desktop-x86_64-20-1 rootfstype=auto ro rd.live.image quiet  rhgb rd.luks=0 rd.md=0 rd.dm=0 nomodeset BOOT_IMAGE=vmlinuz0 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.11.10-301.fc20.x86_64
product:        Fedora
release:        Fedora release 20 (Heisenbug)
type:           anaconda
version:        20