Description of problem:
Hit the reboot button at the end of the installation.

Version-Release number of selected component:
anaconda-core-21.39-1.fc21.x86_64

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 4253, in _postTeardown
    self.name = "tmploop%d" % self.id
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 870, in teardown
    self._postTeardown(recursive=recursive)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 365, in teardownParents
    parent.teardown(recursive=recursive)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 875, in _postTeardown
    self.teardownParents(recursive=recursive)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 870, in teardown
    self._postTeardown(recursive=recursive)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 2108, in deactivate
    StorageDevice.teardown(self, recursive=recursive)
  File "/sbin/anaconda", line 79, in exitHandler
    dev.deactivate(recursive=True)
  File "/usr/lib64/python2.7/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
DeviceError: Cannot rename existing device.

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda --image=test.img
cmdline_file:   BOOT_IMAGE=/vmlinuz-3.15.0-0.rc8.git2.1.fc21.x86_64 root=/dev/mapper/luks-36285af3-9661-4c95-af2d-d0c251e1942c ro vconsole.font=latarcyrheb-sun16 rd.luks.uuid=luks-4ec93b6f-d2ed-4f14-b24c-8eaca9815c34 rd.luks.uuid=luks-36285af3-9661-4c95-af2d-d0c251e1942c rhgb quiet LANG=en_US.UTF-8
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.15.0-0.rc8.git2.1.fc21.x86_64
other involved packages: python-blivet-0.54-1.fc21.noarch, python-libs-2.7.7-1.fc21.x86_64
product:        Fedora
release:        Fedora release 21 (Rawhide)
type:           anaconda
version:        rawhide