Description of problem:
Selecting etc4 /dev/sc14 as disk and not formating.

Version-Release number of selected component:
anaconda-20.14-1.fc20.x86_64

The following was filed automatically by anaconda:
anaconda 20.14-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 1948, in copy
    root.swaps = [new.devicetree.getDeviceByID(d.id) for d in root.swaps]
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 845, in _reset_storage
    self.__storage = self.storage.copy()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 866, in refresh
    self._reset_storage()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/hubs/__init__.py", line 108, in _runSpoke
    action.refresh()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/hubs/__init__.py", line 413, in _on_spoke_clicked
    self._runSpoke(spoke)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/hubs/__init__.py", line 429, in _on_spoke_clicked
    self._on_spoke_clicked(self._spokes[dest].selector, None, self._spokes[dest])
AttributeError: 'NoneType' object has no attribute 'id'

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda --liveinst --method=livecd:///dev/mapper/live-osimg-min --lang is_IS.utf8
cmdline_file:   initrd=initrd0.img root=live:CDLABEL=Fedora-Live-Desktop-x86_64-20-Al rootfstype=auto ro rd.live.image quiet  rhgb rd.luks=0 rd.md=0 rd.dm=0  BOOT_IMAGE=vmlinuz0 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.11.0-300.fc20.x86_64
other involved packages: python-blivet-0.20-1.fc20.noarch
product:        Fedora
release:        Fedora release 20 (Heisenbug)
type:           anaconda
version:        20