I'm having this bug not solved, it happened to me when I tried to install steam on 16.04.
The dpkg commands mentionned by #7 and #8 worked, but didn't solve the problem for me.
I also tried doing sudo apt-get remove libc6-amd64:i386 libc6-dev-amd64:i386, but my apt-get is still broken because of gcc-multilib, so it refuses to do anything.
I'm having this bug not solved, it happened to me when I tried to install steam on 16.04.
The dpkg commands mentionned by #7 and #8 worked, but didn't solve the problem for me.
I also tried doing sudo apt-get remove libc6-amd64:i386 libc6-dev- amd64:i386, but my apt-get is still broken because of gcc-multilib, so it refuses to do anything.