Description of problem:
after specifying repos (F20 sources at NFS + 6 other repos /updates + other/ at local http server), when anaconda process repository metadata, crash occurs.

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 "/usr/lib/python2.7/site-packages/yum/misc.py", line 790, in _decompress_chunked
    raise Errors.MiscError, msg
  File "/usr/lib/python2.7/site-packages/yum/misc.py", line 1147, in decompress
    _decompress_chunked(filename, out, ztype)
  File "/usr/lib/python2.7/site-packages/yum/misc.py", line 1162, in repo_gen_decompress
    return decompress(filename, dest=dest, check_timestamps=True)
  File "/usr/lib/python2.7/site-packages/yum/yumRepo.py", line 284, in _check_uncompressed_db_gen
    cached=repo.cache)
  File "/usr/lib/python2.7/site-packages/yum/yumRepo.py", line 239, in populate
    mydbtype)
  File "/usr/lib/python2.7/site-packages/yum/repos.py", line 383, in populateSack
    sack.populate(repo, mdtype, callback, cacheonly)
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 770, in _getSacks
    self.repos.populateSack(which=repos)
  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/pyanaconda/packaging/yumpayload.py", line 1004, in _yumGroups
    self._groups = self._yum.comps
  File "/usr/lib/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 889, in environments
    yum_groups = self._yumGroups
  File "/usr/lib/python2.7/site-packages/pyanaconda/ui/gui/spokes/source.py", line 473, in getRepoMetadata
    self.payload.environments
  File "/usr/lib/python2.7/threading.py", line 764, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python2.7/site-packages/pyanaconda/threads.py", line 192, in run
    threading.Thread.run(self, *args, **kwargs)
MiscError: Error reading from file /tmp/yum.cache/anaconda/607c312ecfd09c97b30489c0bb13e9ddf25624e703dea02611ba7000f739bb7c-primary.sqlite.bz2: invalid data stream

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda
cmdline_file:   initrd=initrd.img inst.stage2=hd:LABEL=Fedora\x2020\x20i386 askmethod BOOT_IMAGE=vmlinuz 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.11.10-301.fc20.i686
product:        Fedora
release:        Cannot get release name.
type:           anaconda
version:        20