Comment 2 for bug 1764848

I was able to recreate this when upgrading a Ubuntu 16.04 chroot to Ubuntu 18.04 by editing /etc/apt/sources.list from xenial to bionic and running 'apt-get dist-upgrade'.

Setting up ca-certificates (20180409) ...
Updating certificates in /etc/ssl/certs...
rehash: skipping duplicate certificate in Go_Daddy_Class_2_CA.pem
dpkg: error processing package ca-certificates (--configure):
 installed ca-certificates package post-installation script subprocess returned error exit status 1