Comment 2 for bug 1289331

From the logs, the root of this error is:

Stopped glibc upgrade. Please retry the upgrade after you have
checked or stopped services by hand.
dpkg: error processing /var/cache/apt/archives/libc6_2.17-93ubuntu4_i386.deb (--unpack):
 subprocess new pre-installation script returned error exit status 1

We really shouldn't be asking users this debconf question as part of a foreign libc upgrade. Triaging as "low", however, since the problem occurred only because you answered the question inconsistently for libc6:amd64 vs. libc6:i386, and in the common case users will not be shown this question at all.