RHEL7 Beta Installation fails with an abrt message "anaconda-19.31.36-1: AttributeError: 'YumBase' object has no attribute 'preconf'"

Issue

• Installing Red Hat Enterprise Linux 7 Beta, and it fails with the following abrt message and traceback.

cmdline:        /usr/bin/python  /sbin/anaconda
cmdline_file:    console=ttyS0 inst.text inst.stage2=hd:LABEL=RHEL-7.0\x20Everything.x86_64
comment:        
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.10.0-54.0.1.el7.x86_64
last_occurrence: 1386879600
pkg_arch:       x86_64
pkg_epoch:      0
pkg_name:       anaconda
pkg_release:    1
pkg_version:    19.31.36
product:        Red Hat Enterprise Linux
release:        Red Hat Enterprise Linux Server release 7.0 Beta (Maipo)
time:           Thu 12 Dec 2013 08:20:00 PM UTC
version:        7.0

anaconda-tb:    Text file, 186821 bytes
anaconda.log:   Text file, 4454 bytes
packaging.log:  Text file, 10405 bytes
program.log:    Text file, 20687 bytes
storage.log:    Text file, 74038 bytes
syslog:         Text file, 57725 bytes

backtrace:
:Traceback (most recent call last):
:  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 168, in run
:    threading.Thread.run(self, *args, **kwargs)
:  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/ui/tui/spokes/source.py", line 314, in getRepoMetadata
:    self.payload.updateBaseRepo(fallback=False, checkmount=False)
:  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 476, in updateBaseRepo
:    self._configureBaseRepo(self.storage, checkmount=checkmount)
:  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 772, in _configureBaseRepo
:    self._yum.preconf.releasever = self._getReleaseVersion(url)
:AttributeError: 'YumBase' object has no attribute 'preconf'

description:
:The following was filed automatically by anaconda:
:anaconda 19.31.36-1 exception report
:Traceback (most recent call first):
:  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 772, in _configureBaseRepo
:    self._yum.preconf.releasever = self._getReleaseVersion(url)
:  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 476, in updateBaseRepo
:    self._configureBaseRepo(self.storage, checkmount=checkmount)
:  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/tui/spokes/source.py", line 314, in getRepoMetadata
:    self.payload.updateBaseRepo(fallback=False, checkmount=False)
:  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 168, in run
:    threading.Thread.run(self, *args, **kwargs)
:AttributeError: 'YumBase' object has no attribute 'preconf'