rinari-web-server: errors on requests

[bgainor]

When running rinari-web-server, I get the following errors in Emacs' *Messages* buffer (usually several times):

error in process filter: run-hooks: Symbol's value as variable is void: compilation-filter-start
error in process filter: Symbol's value as variable is void: compilation-filter-start

I noticed compilation-filter-start is listed as a new feature in Emacs 24 (http://www.masteringemacs.org/articles/2011/12/12/what-is-new-in-emacs-24-part-2/), whereas I am using Emacs 23.2.1. Is there some way I can hack around this, or does Rinari require Emacs 24?