package libc6 2.21-0ubuntu4 failed to install/upgrade: trying to overwrite shared '/usr/share/doc/libc6/changelog.Debian.gz', which is different from other instances of package libc6:i386

[Theophilus]

libc6 appears broken. This is my third time doing a clean install, and every time, the same error occurs.

ProblemType: Package
DistroRelease: Ubuntu 15.04
Package: libc6 2.21-0ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-17.17-generic 3.19.6
Uname: Linux 3.19.0-17-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
AptOrdering:
 libc6: Install
 libc6: Configure
 libc6: Configure
 NULL: ConfigurePending
Architecture: amd64
Date: Sat May 16 22:32:39 2015
Dependencies:
 gcc-5-base 5.1~rc1-0ubuntu1
 libc6 2.21-0ubuntu4
 libgcc1 1:5.1~rc1-0ubuntu1
 multiarch-support 2.21-0ubuntu4
ErrorMessage: trying to overwrite shared '/usr/share/doc/libc6/changelog.Debian.gz', which is different from other instances of package libc6:i386
InstallationDate: Installed on 2015-05-15 (1 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
RelatedPackageVersions:
 dpkg 1.17.25ubuntu1
 apt 1.0.9.7ubuntu4
SourcePackage: glibc
Title: package libc6 2.21-0ubuntu4 failed to install/upgrade: trying to overwrite shared '/usr/share/doc/libc6/changelog.Debian.gz', which is different from other instances of package libc6:i386
UpgradeStatus: No upgrade log present (probably fresh install)