Description of problem:
start with 80GB virtual disk
1. Installation options, partition scheme BTRFS.
2. Manual partitioning, click + to add a partition.
3. Enter / and 82gb in the dialog, click OK.
Crash.
The following was filed automatically by anaconda:
anaconda 19.23-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/devicefactory.py", line 1175, in __init__
    super(BTRFSFactory, self).__init__(storage, size, disks, **kwargs)
  File "/usr/lib/python2.7/site-packages/blivet/devicefactory.py", line 97, in get_device_factory
    return factory_class(blivet, size, disks, **kwargs)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 1875, in factoryDevice
    **kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 957, in _replace_device
    new_device = self.__storage.factoryDevice(*args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 1237, in _save_right_side
    selector=selector)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 2231, in _save_current_selector
    self._save_right_side(self._current_selector)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 2308, in on_page_clicked
    self._save_current_selector()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 894, in _do_refresh
    self.on_page_clicked(firstPage, mountpointToShow=mountpointToShow)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 1907, in on_add_clicked
    self._do_refresh(mountpointToShow=mountpoint)
TypeError: __init__() got an unexpected keyword argument 'container_raid_level'

Version-Release number of selected component:
anaconda-19.23-1.fc19.x86_64

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-Live-Desktop-x86_64-19-Be rootfstype=auto ro rd.live.image quiet  rhgb rd.luks=0 rd.md=0 rd.dm=0  BOOT_IMAGE=vmlinuz0 
core_backtrace: 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.9.0-0.rc8.git0.2.fc19.x86_64
other involved packages: python-blivet-0.11-1.fc19.noarch
packaging.log:  
product:        Fedora
release:        Fedora release 19 (Schrödinger’s Cat)
type:           anaconda
ureports_counter: 1
version:        19

Truncated backtrace:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 1907, in on_add_clicked
    self._do_refresh(mountpointToShow=mountpoint)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 894, in _do_refresh
    self.on_page_clicked(firstPage, mountpointToShow=mountpointToShow)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 2308, in on_page_clicked
    self._save_current_selector()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 2231, in _save_current_selector
    self._save_right_side(self._current_selector)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 1237, in _save_right_side
    selector=selector)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 957, in _replace_device
    new_device = self.__storage.factoryDevice(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 1875, in factoryDevice
    **kwargs)
  File "/usr/lib/python2.7/site-packages/blivet/devicefactory.py", line 97, in get_device_factory
    return factory_class(blivet, size, disks, **kwargs)
  File "/usr/lib/python2.7/site-packages/blivet/devicefactory.py", line 1175, in __init__
    super(BTRFSFactory, self).__init__(storage, size, disks, **kwargs)
TypeError: __init__() got an unexpected keyword argument 'container_raid_level'