Description of problem:
Clicked the Reclaim Disk Space option after the install didn't let me continue after custom partitioning, even though it wouldn't say what was wrong. I have a couple drives on this computer, but one is dedicated to Fedora 20. I was using BTRFS with no encryption. The disk was prepartitioned using GPT partitioning, with a 2GB swap, 500MB ext4 boot partition, and the rest was a BTRFS partition. During the custom partitioning step, I told it to reformat all 3. The disk is the boot disk in my bios, and I marked it as the boot disk in the installer.

Version-Release number of selected component:
anaconda-20.25.6-1.fc20.x86_64

The following was filed automatically by anaconda:
anaconda 20.25.6-1 exception report
Traceback (most recent call first):
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/lib/resize.py", line 268, in _update_action_buttons
    self._shrinkButton.set_sensitive(device.resizable)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/lib/resize.py", line 442, in on_selection_changed
    self._update_action_buttons(self._diskStore[itr])
TypeError: Argument 1 does not allow None as a value

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda --liveinst --method=livecd:///dev/mapper/live-base --lang en_US.UTF-8
cmdline_file:   initrd=initrd0.img root=live:CDLABEL=Fedora-Live-KDE-x86_64-20-Beta-5 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:         3.11.6-301.fc20.x86_64
product:        Fedora
release:        Fedora release 20 (Heisenbug)
type:           anaconda
version:        20