Subject: Re: bug#19855: package-installed-p returns nil for installed packages

From: Noam Postavsky <[email-masked]>
Date: Sat, 25 Jun 2016 14:43:15 -0400

tag 19855 + unreproducible
quit

Works for me too. Possibly you have an old package.el on your
load-path? Try M-x list-load-path-shadows