Version-Release number of selected component:
anaconda-20.21-1.fc20.x86_64

The following was filed automatically by anaconda:
anaconda 20.21-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 2404, in size
    size += max(0, self.align(pv.size - pv.format.peStart))
  File "/usr/lib/python2.7/site-packages/blivet/devicefactory.py", line 412, in <lambda>
    containers.sort(key=lambda c: getattr(c, "freeSpace", c.size),
  File "/usr/lib/python2.7/site-packages/blivet/devicefactory.py", line 413, in get_container
    reverse=True)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 1268, in _save_right_side
    container = factory.get_container()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 1883, in on_back_clicked
    self._save_right_side(self._current_selector)
AttributeError: 'DeviceFormat' object has no attribute 'peStart'

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda --liveinst --method=livecd:///dev/mapper/live-osimg-min --lang en_US.UTF-8
cmdline_file:   initrd=initrd0.img root=live:CDLABEL=Fedora-20-Nightly-x86_64-Live-de 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:         3.11.2-301.fc20.x86_64
other involved packages: python-blivet-0.22-1.fc20.noarch
product:        Fedora
release:        Fedora release 20 (Heisenbug)
type:           anaconda
version:        20