Description of problem:
1. Installation Destination > Choose 6 disks previously used by anaconda of same version, with "guided" autopartitioning Btrfs.
2. Manual Partitioning > Delete all partitions/subvols
3. Add Root, set to Btrfs.
4. Finish.
5. Begin installation
Crash
The following was filed automatically by anaconda:
anaconda 18.37.8 exception report
Traceback (most recent call first):
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/formats/__init__.py", line 322, in destroy
    raise FormatDestroyError(msg)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/devices.py", line 4169, in _destroy
    DeviceFormat(device=device.path, exists=True).destroy()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/devices.py", line 818, in destroy
    self._destroy()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/deviceaction.py", line 286, in execute
    self.device.destroy()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/devicetree.py", line 323, in processActions
    action.execute()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/__init__.py", line 323, in doIt
    self.devicetree.processActions()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/__init__.py", line 174, in turnOnFilesystems
    storage.doIt()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/install.py", line 114, in doInstall
    turnOnFilesystems(storage)
  File "/usr/lib64/python2.7/threading.py", line 504, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 91, in run
    threading.Thread.run(self, *args, **kwargs)
FormatDestroyError: error wiping old signatures from /dev/sda2: 1

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-18-TC3-x86_64-Live-Deskto 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:         3.6.10-4.fc18.x86_64
other involved packages: python-libs-2.7.3-13.fc18.x86_64
package:        anaconda-18.37.8-1.fc18.x86_64
product:        Fedora
release:        Fedora release 18 (Spherical Cow)
type:           libreport
version:        18