Description of problem:
Running QA:Testcase_Anaconda_rescue_mode on ppc64 KVM using FC21 Alpha RC1 DVD iso.
I have reached screen propting about disk scan. Presented with options to continue, read-only and skip, choosing any results in similar crash(this choosing continue). Every time/run value of KeyError is diffrent(regardless, option...).

Version-Release number of selected component:
anaconda-21.48.8-1

The following was filed automatically by anaconda:
anaconda 21.48.8-1 exception report
Traceback (most recent call first):
  File "/usr/lib64/python2.7/site-packages/snack.py", line 348, in run
    return self.trans[which]
  File "/usr/lib64/python2.7/site-packages/snack.py", line 693, in run
    return self.form.run()
  File "/usr/lib64/python2.7/site-packages/snack.py", line 673, in runOnce
    result = self.run(x, y)
  File "/usr/lib64/python2.7/site-packages/snack.py", line 833, in ButtonChoiceWindow
    return bb.buttonPressed(g.runOnce(x, y))
  File "/usr/lib64/python2.7/site-packages/pyanaconda/rescue.py", line 299, in doRescue
    [_("Continue"), _("Read-Only"), _("Skip")] )
  File "/sbin/anaconda", line 1310, in <module>
    rescue.doRescue(anaconda.intf, anaconda.rescue_mount, ksdata)
KeyError: 858215776

Additional info:
addons:         com_redhat_kdump
cmdline:        /usr/bin/python  /sbin/anaconda
cmdline_file:   BOOT_IMAGE=/ppc/ppc64/vmlinuz rescue ro
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.17.0-300.fc21.ppc64
product:        Fedora"
release:        Cannot get release name.
type:           anaconda
version:        Fedora