Description of problem:


Version-Release number of selected component:
anaconda-21.39-1

The following was filed automatically by anaconda:
anaconda 21.39-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 686, in _setName
    raise errors.DeviceError("Cannot rename existing device.")
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 406, in <lambda>
    lambda s, v: s._setName(v),
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 4733, in _setFormat
    self.name = "btrfs.%d" % self.id
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 1038, in <lambda>
    lambda d,f: d._setFormat(f),
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 567, in __init__
    self.format = fmt
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 2231, in __init__
    super(ContainerDevice, self).__init__(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 4627, in __init__
    super(BTRFSDevice, self).__init__(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 4713, in __init__
    super(BTRFSVolumeDevice, self).__init__(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 1703, in handleBTRFSFormat
    exists=True)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 1859, in handleUdevDeviceFormat
    self.handleBTRFSFormat(info, device)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 1245, in addUdevDevice
    self.handleUdevDeviceFormat(info, device)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 2133, in _populate
    self.addUdevDevice(dev)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 2069, in populate
    self._populate()
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 471, in reset
    self.devicetree.populate(cleanupOnly=cleanupOnly)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 189, 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)
DeviceError: Cannot rename existing device.

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda
cmdline_file:   initrd=/test/vpodzime/my_composes/initrd.img root=live:http://cobra02/trees/vp/my_comps_squashfs.img nokill repo=http://cobra02/trees/rawhide/x86_64/os/ text BOOT_IMAGE=/test/vpodzime/my_composes/vmlinuz 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.15.0-0.rc8.git0.1.fc21.x86_64
product:        Fedora
release:        Cannot get release name.
type:           anaconda
version:        21