Bug 1204320

Description of problem:
Installing Fedora 20 on a Stylistic ST-6012 x86_64
This configuration has installed flawlessly on several other units.
Anaconda doesn't seem to check error conditions or recover well from any unexpected exception.

Version-Release number of selected component:
anaconda-20.25.15-1

The following was filed automatically by anaconda:
anaconda 20.25.15-1 exception report
Traceback (most recent call first):
  File "<string>", line 100, in next
  File "/usr/lib/yum-plugins/blacklist.py", line 47, in exclude_hook
    for event, elem in iterparse(infile):
  File "/usr/lib/python2.7/site-packages/yum/plugins.py", line 188, in run
    func(conduitcls(self, self.base, conf, **kwargs))
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 784, in _getSacks
    self.plugins.run('exclude')
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1050, in <lambda>
    pkgSack = property(fget=lambda self: self._getSacks(),
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 904, in _getGroups
    self.pkgSack
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1073, in <lambda>
    comps = property(fget=lambda self: self._getGroups(),
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 3760, in selectGroup
    if not self.comps.has_group(grpid):
  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 1091, in _selectYumGroup
    self._yum.selectGroup(groupid, group_package_types=pkg_types)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 1199, in _applyYumSelections
    self._selectYumGroup("core")
  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 1273, in checkSoftwareSelection
    self._applyYumSelections()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/software.py", line 124, in checkSoftwareSelection
    self.payload.checkSoftwareSelection()
  File "/usr/lib64/python2.7/threading.py", line 764, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 192, in run
    threading.Thread.run(self, *args, **kwargs)
IOError: [Errno 9] Bad file descriptor

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda
cmdline_file:   initrd=F20/x86_64/isolinux/initrd.img vnc headless shell sshd ksdevice=link lang=en_US keymap=us repo=nfs:vers=3:pickerel:/lake/fedora/20/trees/Fedora-20-x86_64-DVD BOOT_IMAGE=F20/x86_64/isolinux/vmlinuz 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.11.10-301.fc20.x86_64
product:        Fedora
release:        Cannot get release name.
type:           anaconda
version:        20