Description of problem:
During install to blank hard disk,  boot workstation disk , select install to hard disk,  error occurs immedediatly as installer starts

Version-Release number of selected component:
anaconda-core-21.48.13-1.fc21.x86_64

The following was filed automatically by anaconda:
anaconda 21.48.13-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 2362, in _verifyMemberFormat
    if not isinstance(member.format, self.formatClass):
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 2419, in _addParent
    error = self._verifyMemberFormat(member)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 183, in append
    self.appendfunc(y)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 325, in _setParentList
    self._parents.append(parent)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 268, in __init__
    self.parents = parents
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 576, in __init__
    Device.__init__(self, name, parents=parents)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 2083, in __init__
    parents=parents, sysfsPath=sysfsPath)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 4277, in __init__
    sysfsPath=sysfsPath)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 1679, in handleUdevDMRaidMemberFormat
    parents=[device])
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 1882, in handleUdevDeviceFormat
    self.handleUdevDMRaidMemberFormat(info, device)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 1233, in addUdevDevice
    self.handleUdevDeviceFormat(info, device)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 2170, in _populate
    self.addUdevDevice(dev)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 2105, in populate
    self._populate()
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 479, in reset
    self.devicetree.populate(cleanupOnly=cleanupOnly)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 183, in storageInitialize
    storage.reset()
  File "/usr/lib64/python2.7/threading.py", line 766, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 227, in run
    threading.Thread.run(self, *args, **kwargs)
AttributeError: 'DMRaidArrayDevice' object has no attribute 'formatClass'

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda --liveinst --method=livecd:///dev/mapper/live-base
cmdline_file:   BOOT_IMAGE=/isolinux/vmlinuz0 root=live:LABEL=Fedora-Live-Workstation-x86_64-2 ro rd.live.image quiet rhgb
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.17.1-302.fc21.x86_64
other involved packages: python-blivet-0.61.8-1.fc21.noarch, python-libs-2.7.8-4.1.fc21.x86_64
product:        Fedora"
release:        Fedora release 21 (Twenty One)
type:           anaconda
version:        Fedora