Whatever it is, it can hardly be described as an isolated incident,
since at least two related bug reports have already been merged.
Downgrading console-common from 0.7.86 to 0.7.85 allows me to get on
with my work.
root@aptosidbox:~# dpkg --configure --pending
Setting up console-common (0.7.86) ...
Looking for keymap to install:
NONE
insserv: There is a loop between service cryptdisks-early and checkroot
if started
insserv: loop involving service checkroot at depth 11
insserv: loop involving service keyboard-setup at depth 10
insserv: There is a loop between service cryptdisks-early and checkroot
if started
insserv: loop involving service hwclock at depth 13
insserv: loop involving service lvm2 at depth 3
insserv: loop involving service cryptdisks-early at depth 2
insserv: loop involving service udev at depth 1
insserv: There is a loop between service checkroot and keyboard-setup if
started
insserv: loop involving service keymap at depth 24
insserv: exiting now without changing boot order!
update-rc.d: error: insserv rejected the script header
dpkg: error processing console-common (--configure):
subprocess installed post-installation script returned error exit status 1