Bazaar crash on any software/OS updates

  File "/usr/lib/python2.7/dist-packages/bzrlib/transport/__init__.py", line 720, in _seek_and_read
    c_offset.length, actual=len(data))
ShortReadvError: readv() read 0 bytes rather than 177 bytes at 0 for "7b9076f40b402af4d02b425c91c70801.rix"

bzr 2.5.1 on python 2.7.3 (Linux-3.2.0-60-generic-x86_64-with-
    Ubuntu-12.04-precise)
arguments: ['/usr/bin/bzr', 'commit', '-F', '/tmp/etckeeper-bzr.UnJZqUF1oi']
plugins: bash_completion[2.5.1], bzrtools[2.5.0], changelog_merge[2.5.1],
    dbus[0.1.0dev], etckeeper[unknown], explorer[1.2.2], fastimport[0.13.0],
    git[0.6.8], launchpad[2.5.1], netrc_credential_store[2.5.1],
    news_merge[2.5.1], po_merge[2.5.1], qbzr[0.22.2], rewrite[0.6.3],
    stats[0.1.0], trac[1.0.0dev], weave_fmt[2.5.1]
encoding: 'utf-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'

*** Bazaar has encountered an internal error. This probably indicates a
    bug in Bazaar. You can help us fix it by filing a bug report at
        https://bugs.launchpad.net/bzr/+filebug
    including this traceback and a description of the problem.
E: Problem executing scripts DPkg::Post-Invoke 'if [ -x /usr/bin/etckeeper ]; then etckeeper post-install; fi'
E: Sub-process returned an error code