Description of problem:
Error occured while starting blivet-gui for the first time

Version-Release number of selected component:
blivet-gui-0.2.3-1.fc22.noarch

Additional info:
reporter:       libreport-2.5.0
blivet-gui.log: 
cmdline:        /usr/bin/python  /usr/bin/blivet-gui
executable:     /usr/bin/blivet-gui
hashmarkername: blivet-gui
kernel:         4.0.0-0.rc5.git1.3.fc22.x86_64
other involved packages: python-blivet-1.0.5-1.fc22.noarch
product:        Fedora
release:        Fedora release 22 (Twenty Two)
type:           Python
version:        22

Truncated backtrace:
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/blivetgui/list_devices.py", line 195, in on_disk_selection_changed
    self.blivet_gui.update_partitions_view(device_changed=True)
  File "/usr/lib/python2.7/site-packages/blivetgui/blivetgui.py", line 143, in update_partitions_view
    self.list_partitions.update_partitions_list(self.list_devices.selected_device)
  File "/usr/lib/python2.7/site-packages/blivetgui/list_partitions.py", line 135, in update_partitions_list
    partitions = self.blivet_gui.blivet_utils.get_partitions(selected_device)
  File "/usr/lib/python2.7/site-packages/blivetgui/utils.py", line 386, in get_partitions
    partitions = self.get_free_space(blivet_device, partitions)
  File "/usr/lib/python2.7/site-packages/blivetgui/utils.py", line 297, in get_free_space
    free_space = blivet.partitioning.getFreeRegions([blivet_device])
  File "/usr/lib/python2.7/site-packages/blivet/partitioning.py", line 407, in getFreeRegions
    for f in disk.format.partedDisk.getFreeSpaceRegions():
AttributeError: 'Ext4FS' object has no attribute 'partedDisk'