emacs with emacs-slime shows error "Don't know how to compile nil"

[R Mercado]

I see the error below when starting emacs ever since I added emacs-slime
to my fedora 20 box.

/usr/share/emacs/site-lisp/site-start.d/slime.el:Error: Don't know how
to compile nil

Where to report the bug?

Thanks