pi@raspberry ~ $ sudo apt-get dist-upgrade
    Reading package lists... Done
    Building dependency tree... Done
    Calculating upgrade... Done
    The following NEW packages will be installed:
      apt apt-utils base-files base-passwd bash bash-completion bsdmainutils bsdutils ca-certificates coreutils dash debconf debconf-i18n debianutils diffutils dpkg e2fslibs e2fsprogs findutils gnupg gnupg-curl gpgv grep gzip hostname
      initscripts insserv krb5-locales libacl1 libapt-inst1.5 libapt-pkg4.12 libattr1 libblkid1 libbz2-1.0 libcomerr2 libcurl3-gnutls libdb5.1 libgcrypt11 libgnutls26 libgpg-error0 libgpm2 libgssapi-krb5-2 libidn11 libk5crypto3
      libkeyutils1 libkrb5-3 libkrb5support0 libldap-2.4-2 liblocale-gettext-perl liblzma5 libmount1 libncurses5 libp11-kit0 libpam-modules libpam-modules-bin libpam-runtime libpam0g libpng12-0 libreadline6 librtmp0 libsasl2-2
      libsasl2-modules libselinux1 libsemanage-common libsemanage1 libsepol1 libslang2 libss2 libssh2-1 libssl1.0.0 libstdc++6 libtasn1-3 libtext-charwidth-perl libtext-iconv-perl libtext-wrapi18n-perl libtinfo5 libusb-0.1-4 libustr-1.0-1
      libuuid1 login lsb-base mount ncurses-base ncurses-bin openssl original-awk passwd perl-base psmisc raspbian-archive-keyring readline-common sed sensible-utils sysv-rc sysvinit sysvinit-utils tar tzdata util-linux uuid-runtime zlib1g
    0 upgraded, 101 newly installed, 0 to remove and 0 not upgraded.
    1 not fully installed or removed.
    Need to get 0 B/36.0 MB of archives.
    After this operation, 89.7 MB of additional disk space will be used.
    Do you want to continue [Y/n]?
    Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/Debconf/DbDriver/File.pm line 44, <DEBCONF_CONFIG> chunk 3.
    Use of uninitialized value in -e at /usr/share/perl5/Debconf/DbDriver/File.pm line 46, <DEBCONF_CONFIG> chunk 3.
    Use of uninitialized value in pattern match (m//) at /usr/share/perl5/Debconf/DbDriver/File.pm line 47, <DEBCONF_CONFIG> chunk 3.
    Use of uninitialized value $directory in -d at /usr/share/perl5/Debconf/DbDriver/File.pm line 48, <DEBCONF_CONFIG> chunk 3.
    Use of uninitialized value $directory in concatenation (.) or string at /usr/share/perl5/Debconf/DbDriver/File.pm line 49, <DEBCONF_CONFIG> chunk 3.
    debconf: DbDriver "config": mkdir :No such file or directory
    Setting up libc6:armhf (2.13-38+rpi2+deb7u8) ...
    Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/Debconf/DbDriver/File.pm line 44, <DEBCONF_CONFIG> chunk 3.
    Use of uninitialized value in -e at /usr/share/perl5/Debconf/DbDriver/File.pm line 46, <DEBCONF_CONFIG> chunk 3.
    Use of uninitialized value in pattern match (m//) at /usr/share/perl5/Debconf/DbDriver/File.pm line 47, <DEBCONF_CONFIG> chunk 3.
    Use of uninitialized value $directory in -d at /usr/share/perl5/Debconf/DbDriver/File.pm line 48, <DEBCONF_CONFIG> chunk 3.
    Use of uninitialized value $directory in concatenation (.) or string at /usr/share/perl5/Debconf/DbDriver/File.pm line 49, <DEBCONF_CONFIG> chunk 3.
    debconf: DbDriver "config": mkdir :No such file or directory
    dpkg: error processing libc6:armhf (--configure):
     subprocess installed post-installation script returned error exit status 1
    Errors were encountered while processing:
     libc6:armhf
    E: Sub-process /usr/bin/dpkg returned an error code (1)