[CentOS] Yum segmentation fault updating from 5.6 to 5.7

[sebastiano at datafaber.net]

On Fri, 16 Sep 2011 09:15:23 -0400, m.roth at 5-cent.us wrote:
> Has anyone in this thread - I may have missed some posts last night -
> suggested yum reinstall yum?

This wasn't suggested yet, so I've tried it and it fails in the same 
way (not unexpectedly, I would say):

[root at picard ~]# yum reinstall yum
Loaded plugins: downloadonly, fastestmirror, priorities
Setting up Reinstall Process
Determining fastest mirrors
  * base: mirrors.ircam.fr
  * updates: mirrors.ircam.fr
base                                          | 1.1 kB     00:00
base/primary                                  | 961 kB     00:02
Segmentation fault

Trying again without plugins:

[root at picard ~]# yum clean all
Loaded plugins: downloadonly, fastestmirror, priorities
Cleaning up Everything
Cleaning up list of fastest mirrors
[root at picard ~]# yum --noplugins reinstall yum
Setting up Reinstall Process
base                                          | 1.1 kB     00:00
base/primary                                  | 961 kB     00:01
Segmentation fault