I tested this with versions of update-manager and ubuntu-release-upgrader from cosmic-proposed and the test case did pass.
Setting up ubuntu-release-upgrader-gtk (1:18.10.11.4) ...
Setting up update-manager-core (1:18.10.10.1) ...
Setting up update-manager (1:18.10.10.1) ...
bdmurray@clean-cosmic-amd64:~$ do-release-upgrade -d
Checking for a new Ubuntu release
In /etc/update-manager/release-upgrades Prompt
is set to never so upgrading is not possible.
I tested this with versions of update-manager and ubuntu- release- upgrader from cosmic-proposed and the test case did pass.
Setting up ubuntu- release- upgrader- gtk (1:18.10.11.4) ... clean-cosmic- amd64:~ $ do-release-upgrade -d manager/ release- upgrades Prompt
Setting up update-manager-core (1:18.10.10.1) ...
Setting up update-manager (1:18.10.10.1) ...
bdmurray@
Checking for a new Ubuntu release
In /etc/update-
is set to never so upgrading is not possible.