[CentOS] Yum segmentation fault updating from 5.6 to 5.7

Craig White wrote:
> make sure that there isn't any yum/rpm processes running...
> ps aux|grep yum
> ps aux|grep rpm
>
> Once you've determined they aren't running, try...
>
> yum clean metadata
> yum clean dbcache
>
> (those should be executed when you execute 'yum clean all' but maybe it ain't gettin' done)
>
> and then
> yum update

Segmentation fault again:

[root at picard yum.repos.d]# ps aux | grep yum
root     18050  0.0  0.0   4016   684 pts/1   S+   08:21   0:00 grep yum
[root at picard yum.repos.d]# ps aux | grep rpm 

root     18052  0.0  0.0   4016   684 pts/1   S+   08:21   0:00 grep rpm
[root at picard yum.repos.d]# yum clean metadata
Loaded plugins: downloadonly, fastestmirror, priorities
6 metadata files removed
1 sqlite files removed
0 metadata files removed
[root at picard yum.repos.d]# yum clean dbcache
Loaded plugins: downloadonly, fastestmirror, priorities
0 sqlite files removed
[root at picard yum.repos.d]# yum update 

Loaded plugins: downloadonly, fastestmirror, priorities
Loading mirror speeds from cached hostfile
  * base: mirror.opendoc.net
  * extras: mirror.opendoc.net
  * updates: mirror.opendoc.net
base                                          | 1.1 kB     00:00
base/primary                                  | 961 kB     00:00
Segmentation fault