"GLib-WARNING **: GError set over the top of a previous GError" on yum

Issue: 'yum' does not work properly and reports an error on every single run. Full error message:

# yum update


(process:364942): GLib-WARNING **: GError set over the top of a previous GError or uninitialized memory.
This indicates a bug in someone's code. You must ensure an error is NULL before it's set.
The overwriting error message was: Parsing primary.xml error: Premature end of data in tag format line 93382


(process:364942): GLib-WARNING **: GError set over the top of a previous GError or uninitialized memory.
This indicates a bug in someone's code. You must ensure an error is NULL before it's set.
The overwriting error message was: Parsing primary.xml error: Premature end of data in tag package line 93377


(process:364942): GLib-WARNING **: GError set over the top of a previous GError or uninitialized memory.
This indicates a bug in someone's code. You must ensure an error is NULL before it's set.
The overwriting error message was: Parsing primary.xml error: Premature end of data in tag metadata line 2

Traceback (most recent call last):
File "/usr/bin/yum", line 29, in <module>
yummain.user_main(sys.argv[1:], exit_code=True)
File "/usr/share/yum-cli/yummain.py", line 276, in user_main
errcode = main(args)
File "/usr/share/yum-cli/yummain.py", line 129, in main
result, resultmsgs = base.doCommands()
File "/usr/share/yum-cli/cli.py", line 434, in doCommands
self._getTs(needTsRemove)
File "/usr/lib/python2.6/site-packages/yum/depsolve.py", line 99, in _getTs
self._getTsInfo(remove_only)
File "/usr/lib/python2.6/site-packages/yum/depsolve.py", line 110, in _getTsInfo
pkgSack = self.pkgSack
File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 883, in <lambda>
pkgSack = property(fget=lambda self: self._getSacks(),
File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 668, in _getSacks
self.repos.populateSack(which=repos)
File "/usr/lib/python2.6/site-packages/yum/repos.py", line 294, in populateSack
sack.populate(repo, mdtype, callback, cacheonly)
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 186, in populate
dobj = repo_cache_function(xml, csum)
File "/usr/lib64/python2.6/site-packages/sqlitecachec.py", line 46, in getPrimary
self.repoid))
TypeError: Parsing primary.xml error: Premature end of data in tag file line 93382

Reason: You have an outdated alt-libxml2 package which actually has broken system libxml2 library functionality.  

Solution: Update alt-libxml2 after removing broken ldconfig path:

rm -f /etc/ld.so.conf.d/alt-libxml2.conf

ldconfig

yum update alt-libxml2