Comment 30 for bug 996916

Stephane Charette's 2016-07-25 comment #12 helped me.

I am attempting to upgrade 14.04.5 to 16.04.x.

Unlike others, I did not have a 'postgis' package installed. However, I do have postgresql-plperl-9.3 installed and, after removing this package, the upgrade proceeded normally.

# dpkg --get-selections | grep -i postg
postgresql install
postgresql-9.3 install
postgresql-client-9.3 install
postgresql-client-common install
postgresql-common install
postgresql-contrib-9.3 install
postgresql-plperl-9.3 install
postgresql-server-dev-9.3 install
# apt-get remove postgresql-plperl-9.3