bug#12721: 24.2; package-installed-p behavior on emacs startup

[Glenn Morris]

kostafey wrote:

> How the function package-installed-p should behave on emacs startup if
> some package is already installed? It seems that it returns nil for
> installed package on emacs startup.

It needs package-initialize to have been run, which is only done after
your init file has been read, as documented eg in C-h v
package-enable-at-startup. Maybe you could run package-initialize
explicitly and set package-enable-at-startup to nil? Or use
after-init-hook?