bug#16762: Installed packages are not considered part of the archive contents

[Stefan]

>> Doesn't the above package-installed-p mean that we can't complete the
>> name of an already installed package we want to upgrade?

> Before the patch, `package-install' would be a no-op for a currently
> installed package, even if a new version is available (because when the PKG
> argument is not a pkg-desc, it's passed to `package-compute-transaction' in
> the list of requirements without version, and it's immediately satisfied,
> requiring no package installation).

> Considering that `package-install' wouldn't remove the currently installed
> version, I don't think we'd want it to work for upgrades, anyway.

OK.  Then let's try it on `emacs-24' and keep our fingers crossed,


        Stefan