This is the details I get when the package operation fails if I click repair:
installArchives() failed: E: Cannot get debconf version. Is debconf installed? debconf: apt-extracttemplates failed: No such file or directory E: Cannot get debconf version. Is debconf installed? debconf: apt-extracttemplates failed: No such file or directory E: Cannot get debconf version. Is debconf installed? debconf: apt-extracttemplates failed: No such file or directory dpkg: regarding .../libgcc1_1%3a4.9.1-0ubuntu1_amd64.deb containing libgcc1:amd64, pre-dependency problem: libgcc1 pre-depends on multiarch-support multiarch-support is unpacked, but has never been configured. dpkg: error processing archive /var/cache/apt/archives/libgcc1_1%3a4.9.1-0ubuntu1_amd64.deb (--unpack): pre-dependency problem - not installing libgcc1:amd64 Errors were encountered while processing: /var/cache/apt/archives/libgcc1_1%3a4.9.1-0ubuntu1_amd64.deb Error in function: dpkg: dependency problems prevent configuration of libc6:amd64: libc6:amd64 depends on libgcc1; however: Package libgcc1 is not installed. dpkg: error processing package libc6:amd64 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of multiarch-support: multiarch-support depends on libc6 (>= 2.3.6-2); however: Package libc6:amd64 is not configured yet. dpkg: error processing package multiarch-support (--configure): dependency problems - leaving unconfigured
apt-cache policy debconf