Running that with some options for verbosity confirmed that it isn't the
deluser/delgroup calls that break.
Instead later on in the postrm
(/var/lib/dpkg/info/libvirt-daemon-system.postrm) the generated snippets enter
# Automatically added by dh_installdebconf/11.1.6ubuntu2
if [ "$1" = purge ] && [ -e /usr/share/debconf/confmodule ]; then
. /usr/share/debconf/confmodule
db_purge
fi
# End automatically added section
That section triggers this log:
+ [ -e /usr/share/debconf/confmodule ]
+ . /usr/share/debconf/confmodule
+ [ ! 1 ]
+ [ -z ]
+ exec
+ [ ]
+ exec
+ DEBCONF_REDIR=1
+ export DEBCONF_REDIR
+ db_purge
+ _db_cmd PURGE
+ _db_internal_IFS=
+ IFS=
+ printf %s\n PURGE
+ IFS=
+ IFS=
read -r _db_internal_line
+ RET=20 Unsupported command "removing" (full line was "Removing group
`libvirtd' ...") received from confmodule.
+ return 20
So the issue seems about removing group libvirtd (and not libvirt-dnsmaq
as it first seemed) and somehow that error message creeps into the
debconf handling and then breaks it there.
** Changed in: libvirt (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1951903
Title:
package libvirt-daemon-system 4.0.0-1ubuntu8.19 failed to
install/upgrade: installed libvirt-daemon-system package post-removal
script subprocess returned error exit status 128
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