Bug#955331: After upgrading to buster, libgobject-2.0.so.0 give error "undefined symbol: g_variant_dict_ref"

[Becka]

> Do you have an old version of libglib-2.0.so.0 in /lib/i386-linux-gnu?

Yes.  And I feel like I have wasted your time now, as this was the problem.  I did notice in one of the other bug reports that the submitter also had this, but I must have misread It not to realize it was their problem.  Although I had noticed the duplication too, I had assumed that being in different locations meant there was a reason for the two versions.  Much like Perl and Python seem to have a habit of multiplying!

Just for reference I will reply to your questions in case anything in them helps reveal why this problem is happening.


> Is there anything unusual about this machine that might have resulted
> in it being one of the unlucky ones (weird filesystem? unreliable disk?
> special kernel? crashes a lot? using experimental versions of dpkg?),
> or is it just an ordinary Debian stable system?

It is ordinary Debian stable originally installed from an image, I think that was squeeze, and updated through apt-get.  The one slightly odd thing about my setup is that my root is on a small USB stick, but several directories under /var are bind mounted to a hard disk to reduce writes but also for space.  Those are cache, lib, log, mail, spool, and swap.  /tmp is using tmpfs.

The server is mainly a file server, via NFS to a Mac and DLNA to my TV.  It had not been giving any hardware of software errors, and there was no pressing need to upgrade now.  It was only with being stuck at home that I thought it was the right time so I can keep everything at the latest versions.

> Please run these commands:
> 
>    ls -il /lib/x86_64-linux-gnu/libglib-2.0.so*
>    ls -il /usr/lib/x86_64-linux-gnu/libglib-2.0.so*

I have made the listings hardware independent for completeness.

$ sudo ls -il /lib/*/libglib-2.0.so*
847115 lrwxrwxrwx 1 root root      23 Mar 29 23:45 /lib/i386-linux-gnu/libglib-2.0.so.0 -> libglib-2.0.so.0.3600.4
847000 -rw-r--r-- 1 root root 1055648 Aug 10  2013 /lib/i386-linux-gnu/libglib-2.0.so.0.3600.4

$ sudo ls -il /usr/lib/*/libglib-2.0.so*
672722 lrwxrwxrwx 1 root root      16 Nov  6 08:29 /usr/lib/i386-linux-gnu/libglib-2.0.so -> libglib-2.0.so.0
672710 lrwxrwxrwx 1 root root      23 Nov  6 08:29 /usr/lib/i386-linux-gnu/libglib-2.0.so.0 -> libglib-2.0.so.0.5800.3
668238 -rw-r--r-- 1 root root 1275944 Nov  6 08:29 /usr/lib/i386-linux-gnu/libglib-2.0.so.0.5800.3


> If so, move the older version in /lib/i386-linux-gnu out of the way, and
> keep the newer version in /usr/lib/i386-linux-gnu. Then reinstall
> libglib2.0-0 (not strictly necessary but probably a good idea).

> You will probably also have old versions of libgio-2.0.so.0,
> libgmodule-2.0.so.0, libgthread-2.0.so.0 in /usr/lib/i386-linux-gnu. It's
> probably best if you remove those too.

That worked!  Thank you.  And yes, the other files did exist.


> As far as we can guess, this was caused by something going wrong several
> years ago (it would have been at the time you upgraded from GLib 2.36.4
> to a newer version, most likely in early 2014 - GLib 2.36.x was never
> in a stable release, so you must have been running testing or unstable
> at the time). Your logs in /var/log/apt probably don't go back that far,
> but if they do, or if you have sufficiently old backups of /var/log/apt,
> please show us what happened during that upgrade.

I cannot remember now, but it is quite possible I had added an unstable repository to install a specific package.

My oldest history.log file under /var/log/apt has the timestamp of Nov 29, 2015, and the below log entries are the start of the file as it attempts to upgrade the library from 2.33.12+really2.32.4-5 to 2.42.1-1.

The other entires in that log are for "apt-get upgrade” and “apt-get install ffmpeg” executed immediately after without error.  I have no memory of what I must have done between 9:20 and 9:28 to fix the dpkg error.  The only references to libglib2.0-0 in more recent log files are as part of an "apt-get upgrade” command which complete without error.  Those, incidentally, are upgrading in the steps (2.42.1-1+deb8u3, 2.50.3-2+deb9u2) and (2.50.3-2+deb9u2, 2.58.3-2+deb10u2).


Start-Date: 2015-11-29  08:34:51
Install: libglapi-mesa:i386 (10.3.2-1+deb8u1, automatic), ttf-bitstream-vera:i386 (1.10-8, automatic), libplist2:i386 (1.11-3, automatic), libestr0:i386 (0.1.9-1.1, automatic), libswscale3:i386 (11.4-1~deb8u1, automatic), libpangoxft-1.0-0:i386 (1.36.8-3, automatic), liblogging-stdlog0:i386 (1.0.4-1, automatic), libnl-3-200:i386 (3.2.24-2, automatic), libavutil54:i386 (11.4-1~deb8u1, automatic), libgnutlsxx28:i386 (3.3.8-6+deb8u3, automatic), libneon27:i386 (0.30.1-1, automatic), libnettle4:i386 (2.7.1-5, automatic), irqbalance:i386 (1.0.6-3, automatic), libapparmor1:i386 (2.9.0-3, automatic), netfilter-persistent:i386 (1.0.3, automatic), libx264-142:i386 (0.142.2431+gita5831aa-1+b2, automatic), python-pycparser:i386 (2.10+dfsg-3, automatic), libgl1-mesa-swx11:i386 (10.3.2-1+deb8u1, automatic), libgpac3:i386 (0.5.0+svn5324~dfsg1-1+b3, automatic), libjpeg62-turbo:i386 (1.3.1-12, automatic), libx86emu1:i386 (1.4-2, automatic), libnet-smtp-ssl-perl:i386 (1.01-3, automatic), libpangoft2-1.0-0:i386 (1.36.8-3, automatic), libglu1-mesa:i386 (9.0.0-2, automatic), libsystemd0:i386 (215-17+deb8u3, automatic), python-cryptography:i386 (0.6.1-1, automatic), libcdt5:i386 (2.38.0-7, automatic), libopenjpeg5:i386 (1.5.2-3, automatic), python-pyasn1-modules:i386 (0.0.5-0.1, automatic), libserf-1-1:i386 (1.3.8-1, automatic), postgresql-doc-9.4:i386 (9.4.5-0+deb8u1, automatic), iproute2:i386 (3.16.0-2, automatic), libatm1:i386 (2.5.1-1.5, automatic), dmeventd:i386 (1.02.90-2.2, automatic), startpar:i386 (0.59-3, automatic), pinentry-curses:i386 (0.8.3-2, automatic), python-characteristic:i386 (0.1.0-1, automatic), libavcodec-extra-56:i386 (11.4-1~deb8u1, automatic), libparted2:i386 (3.2-7, automatic), libnl-route-3-200:i386 (3.2.24-2, automatic), libdns100:i386 (9.9.5.dfsg-9+deb8u3, automatic), postgresql-client-9.4:i386 (9.4.5-0+deb8u1, automatic), libtasn1-6:i386 (4.2-3+deb8u1, automatic), libgphoto2-6:i386 (2.5.4-1.1+b2, automatic), libavformat56:i386 (11.4-1~deb8u1, automatic), libisccc90:i386 (9.9.5.dfsg-9+deb8u3, automatic), node-async:i386 (0.8.0-1, automatic), libgraphite2-3:i386 (1.2.4-3, automatic), libcgraph6:i386 (2.38.0-7, automatic), libavresample2:i386 (11.4-1~deb8u1, automatic), libaudit-common:i386 (2.4-1, automatic), libpangocairo-1.0-0:i386 (1.36.8-3, automatic), libhd21:i386 (21.6-1, automatic), libtasn1-doc:i386 (4.2-3+deb8u1, automatic), libelfg0:i386 (0.8.13-5, automatic), linux-image-3.16.0-4-686-pae:i386 (3.16.7-ckt20-1, automatic), libgcrypt20-dev:i386 (1.6.3-2, automatic), node-wordwrap:i386 (0.0.2-2, automatic), libc6-i686:i386 (2.19-18+deb8u1, automatic), libpython2.7-stdlib:i386 (2.7.9-2, automatic), emacsen-common:i386 (2.0.8, automatic), python-ply:i386 (3.4-5, automatic), python-six:i386 (1.8.0-1, automatic), liblwres90:i386 (9.9.5.dfsg-9+deb8u3, automatic), libosmesa6:i386 (10.3.2-1+deb8u1, automatic), libpango-1.0-0:i386 (1.36.8-3, automatic), node-optimist:i386 (0.3.5-1, automatic), debugedit:i386 (4.11.3-1.1, automatic), libjson-c2:i386 (0.11-4, automatic), libpangox-1.0-0:i386 (0.0.2-5, automatic), python-cffi:i386 (0.8.6-1, automatic), libksba8:i386 (1.3.2-1, automatic), gnupg-agent:i386 (2.0.26-6, automatic), libaa1:i386 (1.4p5-43, automatic), libpython2.7-minimal:i386 (2.7.9-2, automatic), libgcrypt20:i386 (1.6.3-2, automatic), libauthen-sasl-perl:i386 (2.1600-1, automatic), nettle-dev:i386 (2.7.1-5, automatic), libhogweed2:i386 (2.7.1-5, automatic), libbind9-90:i386 (9.9.5.dfsg-9+deb8u3, automatic), python-service-identity:i386 (1.0.0-3, automatic), libpython-stdlib:i386 (2.7.9-1, automatic), libavresample-dev:i386 (11.4-1~deb8u1, automatic), libgd3:i386 (2.1.0-5, automatic), libgvc6:i386 (2.38.0-7, automatic), libassuan0:i386 (2.1.2-2, automatic), libisc-export95:i386 (9.9.5.dfsg-9+deb8u3, automatic), libtiff5:i386 (4.0.3-12.3, automatic), libudev1:i386 (215-17+deb8u3, automatic), libisccfg90:i386 (9.9.5.dfsg-9+deb8u3, automatic), libgvpr2:i386 (2.38.0-7, automatic), libdns-export100:i386 (9.9.5.dfsg-9+deb8u3, automatic), libgnutls-deb0-28:i386 (3.3.8-6+deb8u3, automatic), libsigsegv2:i386 (2.10-4+b1, automatic), libdebconfclient0:i386 (0.192, automatic), liblua5.2-0:i386 (5.2.3-1.1, automatic), liblognorm1:i386 (1.0.1-3, automatic), libharfbuzz0b:i386 (0.9.35-2, automatic), libdb5.3:i386 (5.3.28-9, automatic), libxen-4.4:i386 (4.4.1-9+deb8u2, automatic), libgnutls28-dev:i386 (3.3.8-6+deb8u3, automatic), librtmp1:i386 (2.4+20150115.gita107cef-1, automatic), init:i386 (1.22, automatic), libirs-export91:i386 (9.9.5.dfsg-9+deb8u3, automatic), libisc95:i386 (9.9.5.dfsg-9+deb8u3, automatic), liblvm2cmd2.02:i386 (2.02.111-2.2, automatic), postgresql-contrib-9.4:i386 (9.4.5-0+deb8u1, automatic), libaudit1:i386 (2.4-1+b1, automatic), libio-html-perl:i386 (1.001-1, automatic), libxtables10:i386 (1.4.21-2+b1, automatic), libgphoto2-port10:i386 (2.5.4-1.1+b2, automatic), sysvinit-core:i386 (2.88dsf-59, automatic), gnupg2:i386 (2.0.26-6, automatic), postgresql-9.4:i386 (9.4.5-0+deb8u1, automatic), libprocps3:i386 (3.3.9-9, automatic), libffms2-3:i386 (2.20-1+b1, automatic), libtasn1-6-dev:i386 (4.2-3+deb8u1, automatic), libisccfg-export90:i386 (9.9.5.dfsg-9+deb8u3, automatic), libsasl2-modules-db:i386 (2.1.26.dfsg1-13+deb8u1, automatic)
Upgrade: python-crypto:i386 (2.6-4+deb7u3, 2.6.1-5+b2), dmsetup:i386 (1.02.74-8, 1.02.90-2.2), libpam0g:i386 (1.1.3-9, 1.1.8-3.1), python-twisted-names:i386 (12.0.0-1, 14.0.2-3), libpam-modules-bin:i386 (1.1.3-7.1, 1.1.8-3.1), python-twisted-core:i386 (12.0.0-1, 14.0.2-3), shared-mime-info:i386 (1.0-1+b1, 1.3-1), rpm2cpio:i386 (4.10.0-5+deb7u2, 4.11.3-1.1), libatasmart4:i386 (0.19-1, 0.19-3), iproute:i386 (20120521-3+b3, 3.16.0-2), libpolkit-gobject-1-0:i386 (0.105-3, 0.105-8), librpmbuild3:i386 (4.10.0-5+deb7u2, 4.11.3-1.1), exim4-config:i386 (4.80-7+deb7u1, 4.84-8+deb8u1), bind9-host:i386 (9.8.4.dfsg.P1-6+nmu2+deb7u7, 9.9.5.dfsg-9+deb8u3), procps:i386 (3.3.3-3, 3.3.9-9), libpam-modules:i386 (1.1.3-7.1, 1.1.8-3.1), libglib2.0-bin:i386 (2.33.12+really2.32.4-5, 2.42.1-1), python-zope.interface:i386 (3.6.1-3, 4.1.1-3.1), gphoto2:i386 (2.4.14-1, 2.5.4-1+b1), libdjvulibre21:i386 (3.5.25.3-1, 3.5.25.4-4+b1), libwmf0.2-7:i386 (0.2.8.4-10.3+deb7u1, 0.2.8.4-10.3+deb8u1), libimage-exiftool-perl:i386 (8.60-2, 9.74-1), libglib2.0-dev:i386 (2.33.12+really2.32.4-5, 2.42.1-1), lvm2:i386 (2.02.95-8, 2.02.111-2.2), libdjvulibre-dev:i386 (3.5.25.3-1, 3.5.25.4-4+b1), libjasper-dev:i386 (1.900.1-13+deb7u3, 1.900.1-debian1-2.4), librtmp-dev:i386 (2.4+20121230.gitdf6c518-1, 2.4+20150115.gita107cef-1), gir1.2-gdkpixbuf-2.0:i386 (2.26.1-1+deb7u2, 2.31.1-2+deb8u3), python-twisted-web:i386 (12.0.0-1, 14.0.2-3), dnsutils:i386 (9.8.4.dfsg.P1-6+nmu2+deb7u7, 9.9.5.dfsg-9+deb8u3), libaprutil1-dbd-sqlite3:i386 (1.5.2-1, 1.5.4-1), python-sqlparse:i386 (0.1.4-1, 0.1.13-2), udisks:i386 (1.0.4-7wheezy1, 1.0.5-1+b1), lynx:i386 (2.8.8dev.12-2, 2.8.9dev1-2+deb8u1), exim4-daemon-light:i386 (4.80-7+deb7u1, 4.84-8+deb8u1), iputils-ping:i386 (20101006-1+b1, 20121221-5+b2), postgresql-contrib:i386 (9.1+134wheezy4, 9.4+165), mutt:i386 (1.5.21-6.2+deb7u3, 1.5.23-3), libgcrypt11-dev:i386 (1.5.3-3, 1.5.4-3+really1.6.3-2), libmailtools-perl:i386 (2.09-1, 2.13-1), libcryptsetup4:i386 (1.4.3-4, 1.6.6-5), m4:i386 (1.4.16-3, 1.4.17-4), librpmio3:i386 (4.10.0-5+deb7u2, 4.11.3-1.1), libxslt1.1:i386 (1.1.26-14.1, 1.1.28-2+b2), librpm3:i386 (4.10.0-5+deb7u2, 4.11.3-1.1), rpm-common:i386 (4.10.0-5+deb7u2, 4.11.3-1.1), libsemanage1:i386 (2.1.6-6, 2.3-1+b1), libgraphviz-dev:i386 (2.26.3-14+deb7u2, 2.38.0-7), libcairo2-dev:i386 (1.12.2-3, 1.14.0-2.1), libusb-1.0-0:i386 (1.0.11-1, 1.0.19-1), libcairo2:i386 (1.12.2-3, 1.14.0-2.1), libfontconfig1:i386 (2.9.0-7.1, 2.11.0-6.3), libaprutil1-ldap:i386 (1.5.2-1, 1.5.4-1), fontconfig-config:i386 (2.9.0-7.1, 2.11.0-6.3), subversion:i386 (1.6.17dfsg-4+deb7u10, 1.8.10-6+deb8u1), libgdk-pixbuf2.0-common:i386 (2.26.1-1+deb7u2, 2.31.1-2+deb8u3), login:i386 (4.1.5.1-1, 4.2-3+deb8u1), bluez:i386 (4.99-2, 5.23-2+b1), spamassassin:i386 (3.3.2-5+deb7u3, 3.4.0-6), python2.7:i386 (2.7.3-6+deb7u2, 2.7.9-2), libcurl3-gnutls:i386 (7.34.0-1, 7.38.0-4+deb8u2), libnetcf1:i386 (0.1.9-2+deb7u2, 0.2.3-4.1), liblvm2app2.2:i386 (2.02.95-8, 2.02.111-2.2), python-minimal:i386 (2.7.3-4+deb7u1, 2.7.9-1), parted:i386 (2.3-12, 3.2-7), libdevmapper1.02.1:i386 (1.02.74-8, 1.02.90-2.2), isc-dhcp-client:i386 (4.2.2.dfsg.1-5+deb70u7, 4.3.1-6+deb8u1), hwinfo:i386 (16.0-2.2, 21.6-1), libfontconfig1-dev:i386 (2.9.0-7.1, 2.11.0-6.3), initramfs-tools:i386 (0.109.1, 0.120), libck-connector0:i386 (0.4.5-3.1, 0.4.6-5), libsvn1:i386 (1.6.17dfsg-4+deb7u10, 1.8.10-6+deb8u1), fontconfig:i386 (2.9.0-7.1, 2.11.0-6.3), python-openssl:i386 (0.13-2+deb7u1, 0.14-1), python-twisted-mail:i386 (12.0.0-1, 14.0.2-3), python2.7-minimal:i386 (2.7.3-6+deb7u2, 2.7.9-2), python-gi:i386 (3.2.2-2, 3.14.0-1), dbus:i386 (1.6.8-1+deb7u6, 1.8.20-0+deb8u1), gir1.2-freedesktop:i386 (1.32.1-1, 1.42.0-2.2), udev:i386 (175-7.2, 215-17+deb8u3), passwd:i386 (4.1.5.1-1, 4.2-3+deb8u1), node-uglify:i386 (1.3.4-1~bpo7+1, 2.4.15-1), libvirt0:i386 (0.9.12.3-1+deb7u1, 1.2.9-9+deb8u1), python-plist:i386 (1.8-1, 1.11-3), libpango1.0-0:i386 (1.30.0-1, 1.36.8-3), libcups2:i386 (1.6.4-2, 1.7.5-11+deb8u1), libsemanage-common:i386 (2.1.6-6, 2.3-1), libcurl3:i386 (7.34.0-1, 7.38.0-4+deb8u2), lynx-cur:i386 (2.8.8dev.12-2, 2.8.9dev1-2+deb8u1), libcairo-script-interpreter2:i386 (1.12.2-3, 1.14.0-2.1), iptables-persistent:i386 (0.5.7, 1.0.3), python:i386 (2.7.3-4+deb7u1, 2.7.9-1), bsdutils:i386 (2.20.1-5.5, 2.25.2-6), sudo:i386 (1.8.5p2-1+nmu3, 1.8.10p3-1+deb8u2), gir1.2-glib-2.0:i386 (1.32.1-1, 1.42.0-2.2), libxen-dev:i386 (4.1.4-3+deb7u9, 4.4.1-9+deb8u2), base-passwd:i386 (3.5.28, 3.5.37), libssl-dev:i386 (0.9.8o-4squeeze14, 1.0.1k-3+deb8u1), dictionaries-common:i386 (1.12.11, 1.23.17), libavformat-dev:i386 (0.8.17-1, 11.4-1~deb8u1), libssh2-1:i386 (1.4.3-2, 1.4.3-4.1), davfs2:i386 (1.4.6-1.1+wheezy1, 1.5.2-1), python-twisted-conch:i386 (12.0.0-1, 14.0.2-3), python-twisted-words:i386 (12.0.0-1, 14.0.2-3), libpython2.7:i386 (2.7.3-6+deb7u2, 2.7.9-2), gir1.2-rsvg-2.0:i386 (2.36.1-2, 2.40.5-1), libgirepository-1.0-1:i386 (1.32.1-1, 1.42.0-2.2), curl:i386 (7.21.0-2.1+squeeze6, 7.38.0-4+deb8u2), libgudev-1.0-0:i386 (175-7.2, 215-17+deb8u3), isc-dhcp-common:i386 (4.2.2.dfsg.1-5+deb70u7, 4.3.1-6+deb8u1), postgresql:i386 (9.1+134wheezy4, 9.4+165), libwmf-dev:i386 (0.2.8.4-10.3+deb7u1, 0.2.8.4-10.3+deb8u1), postgresql-doc:i386 (9.1+134wheezy4, 9.4+165), python-dateutil:i386 (1.5+dfsg-0.1, 2.2-2), rpm:i386 (4.10.0-5+deb7u2, 4.11.3-1.1), libdevmapper-event1.02.1:i386 (1.02.74-8, 1.02.90-2.2), postgresql-client:i386 (9.1+134wheezy4, 9.4+165), libjasper1:i386 (1.900.1-13+deb7u3, 1.900.1-debian1-2.4), libgnutls-openssl27:i386 (2.12.23-8, 3.3.8-6+deb8u3), libavcodec-dev:i386 (0.8.17-1, 11.4-1~deb8u1), sysvinit-utils:i386 (2.88dsf-45, 2.88dsf-59), libldap-2.4-2:i386 (2.4.31-2+deb7u1, 2.4.40+dfsg-1+deb8u1), libxdot4:i386 (2.26.3-14+deb7u2, 2.38.0-7), libpam-ck-connector:i386 (0.4.5-3.1, 0.4.6-5), libgdk-pixbuf2.0-0:i386 (2.26.1-1+deb7u2, 2.31.1-2+deb8u3), linux-image-686-pae:i386 (3.2+46, 3.16+63), libglib2.0-0:i386 (2.33.12+really2.32.4-5, 2.42.1-1), librsvg2-2:i386 (2.36.1-2, 2.40.5-1), libcairo-gobject2:i386 (1.12.2-3, 1.14.0-2.1), libpolkit-backend-1-0:i386 (0.105-3, 0.105-8), python-pkg-resources:i386 (0.6.24-1, 5.5.1-1), libsasl2-2:i386 (2.1.25.dfsg1-6+deb7u1, 2.1.26.dfsg1-13+deb8u1), analog:i386 (6.0-19.1, 6.0-20+b2), cryptsetup-bin:i386 (1.4.3-4, 1.6.6-5), libgpgme11:i386 (1.2.0-1.4+deb7u1, 1.5.1-6), exim4:i386 (4.80-7+deb7u1, 4.84-8+deb8u1), librsvg2-dev:i386 (2.36.1-2, 2.40.5-1), rsyslog:i386 (5.8.11-3+deb7u2, 8.4.2-1+deb8u1), libva1:i386 (1.2.1-2, 1.4.1-1), exim4-base:i386 (4.80-7+deb7u1, 4.84-8+deb8u1), librpmsign1:i386 (4.10.0-5+deb7u2, 4.11.3-1.1), sysv-rc:i386 (2.88dsf-41+deb7u1, 2.88dsf-59), libxenstore3.0:i386 (4.1.4-3+deb7u9, 4.4.1-9+deb8u2), libavutil-dev:i386 (0.8.17-1, 11.4-1~deb8u1), libhttp-message-perl:i386 (6.03-1, 6.06-1), libvirt-dev:i386 (0.9.12.3-1+deb7u1, 1.2.9-9+deb8u1), x264:i386 (0.133.2339+git585324f-2, 0.142.2431+gita5831aa-1+b2), libgdk-pixbuf2.0-dev:i386 (2.26.1-1+deb7u2, 2.31.1-2+deb8u3), libaprutil1:i386 (1.5.2-1, 1.5.4-1), initscripts:i386 (2.88dsf-41+deb7u1, 2.88dsf-59), iptables:i386 (1.4.14-3.1, 1.4.21-2+b1), libpathplan4:i386 (2.26.3-14+deb7u2, 2.38.0-7), librsvg2-common:i386 (2.36.1-2, 2.40.5-1), ntfs-3g:i386 (2012.1.15AR.5-2.1+deb7u2, 2014.2.15AR.2-1+deb8u2), libpolkit-agent-1-0:i386 (0.105-3, 0.105-8), sysvinit:i386 (2.88dsf-41+deb7u1, 2.88dsf-59), python-gobject:i386 (3.2.2-2, 3.14.0-1), consolekit:i386 (0.4.5-3.1, 0.4.6-5)
Remove: ttf-dejavu-core:i386 (2.33-3), libswscale2:i386 (10.1-1~bpo70+1), libavutil52:i386 (9.10-1), libavutil53:i386 (10.1-1~bpo70+1), libgphoto2-port0:i386 (2.4.14-2), libgnutlsxx27:i386 (2.12.23-8), libtasn1-3-dev:i386 (2.14-3), libx264-133:i386 (0.133.2339+git585324f-2+b1), re2c:i386 (0.13.5-1), libcdt4:i386 (2.26.3-14+deb7u2), python-dbus-dev:i386 (1.2.0-2), libparted0debian1:i386 (2.3-16), libgphoto2-2:i386 (2.4.14-2), libavformat54:i386 (9.10-1), libcgraph5:i386 (2.26.3-14+deb7u2), libhd16:i386 (16.0-2.2), wwwconfig-common:i386 (0.2.2), libjs-underscore:i386 (1.7.0~dfsg-1), libxfont1:i386 (1.5.1-1), libjs-sphinxdoc:i386 (1.2.3+dfsg-1), libhal1:i386 (0.5.14-8), libgnutls-dev:i386 (2.12.23-8), libgphoto2-l10n:i386 (2.5.4-1.1), python-dbus:i386 (1.2.0-2+b3), libgvc5:i386 (2.26.3-14+deb7u2), libpthread-stubs0:i386 (0.3-3), libgd2-xpm:i386 (2.0.36~rc1~dfsg-6.1+deb7u1), libfontenc1:i386 (1.1.2-1+b2), xfonts-utils:i386 (7.7+2), libgvpr1:i386 (2.26.3-14+deb7u2), libnl1:i386 (1.1-8), libavcodec54:i386 (9.10-1), liblua5.1-0:i386 (5.1.5-7.1), html2text:i386 (1.3.2a-15), libgraph4:i386 (2.26.3-14+deb7u2), xfonts-encodings:i386 (1.0.4-2), libneon27-gnutls:i386 (0.29.6-3), libffms2-2:i386 (2.17+r731-3), gsfonts-x11:i386 (0.22)
Error: Sub-process /usr/bin/dpkg returned an error code (1)
End-Date: 2015-11-29  08:38:40

Start-Date: 2015-11-29  09:09:18
Install: xdg-user-dirs:i386 (0.15-2, automatic), libgvc6:i386 (2.38.0-7), libgvpr2:i386 (2.38.0-7, automatic)
Upgrade: libglib2.0-0:i386 (2.33.12+really2.32.4-5, 2.42.1-1)
Remove: libgvc5:i386 (2.26.3-14+deb7u2)
Error: Sub-process /usr/bin/dpkg returned an error code (1)
End-Date: 2015-11-29  09:09:29

Start-Date: 2015-11-29  09:09:57
Install: xdg-user-dirs:i386 (0.15-2, automatic), libgvc6:i386 (2.38.0-7), libgvpr2:i386 (2.38.0-7, automatic)
Upgrade: libglib2.0-0:i386 (2.33.12+really2.32.4-5, 2.42.1-1)
Remove: libgvc5:i386 (2.26.3-14+deb7u2)
Error: Sub-process /usr/bin/dpkg returned an error code (1)
End-Date: 2015-11-29  09:09:59

Start-Date: 2015-11-29  09:19:19
Commandline: apt-get -f install
Install: xdg-user-dirs:i386 (0.15-2, automatic), libgvc6:i386 (2.38.0-7, automatic), libgvpr2:i386 (2.38.0-7, automatic)
Upgrade: libglib2.0-0:i386 (2.33.12+really2.32.4-5, 2.42.1-1)
Remove: libgvc5:i386 (2.26.3-14+deb7u2)
Error: Sub-process /usr/bin/dpkg returned an error code (1)
End-Date: 2015-11-29  09:19:28

Start-Date: 2015-11-29  09:20:16
Commandline: apt-get -f install
Install: xdg-user-dirs:i386 (0.15-2, automatic), libgvc6:i386 (2.38.0-7, automatic), libgvpr2:i386 (2.38.0-7, automatic)
Upgrade: libglib2.0-0:i386 (2.33.12+really2.32.4-5, 2.42.1-1)
Remove: libgvc5:i386 (2.26.3-14+deb7u2)
Error: Sub-process /usr/bin/dpkg returned an error code (1)
End-Date: 2015-11-29  09:20:24

Start-Date: 2015-11-29  09:28:45
Commandline: apt-get -f install
Install: xdg-user-dirs:i386 (0.15-2, automatic), libgvc6:i386 (2.38.0-7, automatic), libgvpr2:i386 (2.38.0-7, automatic)
Upgrade: libglib2.0-0:i386 (2.33.12+really2.32.4-5, 2.42.1-1)
Remove: libgvc5:i386 (2.26.3-14+deb7u2)
End-Date: 2015-11-29  09:29:13


> The output of these commands would also be useful information:
> 
> for lib in /lib/i386-linux-gnu/*.so.*; do dpkg -S "$lib" >/dev/null || echo "$lib is not owned by a package"; done
> for lib in /usr/lib/i386-linux-gnu/*.so.*; do dpkg -S "$lib" >/dev/null || echo "$lib is not owned by a package"; done

Neither command produced any output.

I hope something in the above can help with locating the cause of this bug.  It seems the clash must have existed for quite a while, as I appear to have installed a newer version in November 2015 than the one that was sitting under /lib.