system-packages-update with aptitude only updates metadata

[ghost]

When system-packages-package-manager is set to aptitude, M-x system-packages-update only runs aptitude update. This updates the list of available packages, but does not install updates. I would suggest appending aptitude safe-upgrade (or similar) to the chain.

From aptitude(8):

       update
           Updates the list of available packages from the apt sources (this
           is equivalent to “apt-get update”)

       safe-upgrade
           Upgrades installed packages to their most recent version. Installed
           packages will not be removed unless they are unused (see the
           section “Managing Automatically Installed Packages” in the aptitude
           reference manual). Packages which are not currently installed may
           be installed to resolve dependencies unless the --no-new-installs
           command-line option is supplied.

• Debian 9.3 (stretch)
• system-packages 20180307.646
• GNU Emacs 25.1.1

[jabranham]

Fixed, thanks!