synaptic's python2.7 errors : crash in meth()

[dino99]

RR i386, logged as gnome-classic (fallback)

here is what is logged into .xsession-errors when synaptic is used for checking possible updates, then doing the upgrades.

Traceback (most recent call last):
  File "/usr/sbin/update-apt-xapian-index", line 97, in <module>
    indexer.slave()
  File "/usr/lib/python2.7/dist-packages/axi/indexer.py", line 454, in slave
    childProgress = ClientProgress(self.progress)
  File "/usr/lib/python2.7/dist-packages/axi/indexer.py", line 211, in __init__
    self.sock.connect(axi.XAPIANDBUPDATESOCK)
  File "/usr/lib/python2.7/socket.py", line 224, in meth
    return getattr(self._sock,name)(*args)
socket.error: [Errno 2] No such file or directory

That issue also make a crash: when apport check it, it detect an old (unknown) lp:965127 report, so it cant be uploaded.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: apt-xapian-index 0.45ubuntu2
ProcVersionSignature: Ubuntu 3.8.0-8.17-generic 3.8.0
Uname: Linux 3.8.0-8-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.8-0ubuntu4
Architecture: i386
Date: Thu Feb 28 00:51:40 2013
MarkForUpload: True
PackageArchitecture: all
SourcePackage: apt-xapian-index
UpgradeStatus: No upgrade log present (probably fresh install)

[tlc (tlc)]

I see this same traceback in my 12.04 cron results when update-apt-xapian-index is run.
Also, it's been reported here: https://bugs.launchpad.net/ubuntu/+source/apt-xapian-index/+bug/655831

/etc/cron.daily/apt:
Traceback (most recent call last):
  File "/usr/sbin/update-apt-xapian-index", line 97, in <module>
    indexer.slave()
  File "/usr/lib/python2.7/dist-packages/axi/indexer.py", line 449, in slave
    childProgress = ClientProgress(self.progress)
  File "/usr/lib/python2.7/dist-packages/axi/indexer.py", line 206, in __init__
    self.sock.connect(axi.XAPIANDBUPDATESOCK)
  File "/usr/lib/python2.7/socket.py", line 224, in meth
    return getattr(self._sock,name)(*args)
socket.error: [Errno 2] No such file or directory