Description of problem:
Today FC2T1 was updated to yum-2.0.5.20040229-1.
The problem is that now yum does not work, which mean I can not
receive a fixed version of yum (catch-22).

Version-Release number of selected component (if applicable
yum-2.0.5.20040229-1

How reproducible:
Always

Steps to Reproduce:
1. yum check-update
  
Actual results:
#yum check-update
Gathering header information file(s) from server(s)
Server: Fedora Core 1.90 - Development Tree
Finding updated packages
Downloading needed headers
Traceback (most recent call last):
  File "/usr/bin/yum", line 30, in ?
    yummain.main(sys.argv[1:])
  File "/usr/share/yum/yummain.py", line 253, in main
    clientStuff.download_headers(HeaderInfo, nulist)
  File "/usr/share/yum/clientStuff.py", line 919, in download_headers
    cachedbdict = returnCacheDBHeaders(nulist)
  File "/usr/share/yum/clientStuff.py", line 901, in returnCacheDBHeaders
    mi = cachedb.dbMatch()
UnboundLocalError: local variable 'cachedb' referenced before assignment

Expected results:
Feching headers