From the ubiquitysyslog file:
May 7 06:19:27 ubuntu kernel: [ 541.518356] frontend[24026]: segfault at 802 ip 080d974d sp bfded400 error 4 in perl[8048000+163000] May 7 06:19:32 ubuntu ubiquity: dpkg: error processing user-setup (--purge): May 7 06:19:32 ubuntu ubiquity: subprocess installed post-removal script was killed by signal (Segmentation fault), core dumped
From the ubiquitysyslog file:
May 7 06:19:27 ubuntu kernel: [ 541.518356] frontend[24026]: segfault at 802 ip 080d974d sp bfded400 error 4 in perl[8048000+ 163000]
May 7 06:19:32 ubuntu ubiquity: dpkg: error processing user-setup (--purge):
May 7 06:19:32 ubuntu ubiquity: subprocess installed post-removal script was killed by signal (Segmentation fault), core dumped