as reported in http://dev.clojure.org/jira/browse/CLJS-1606, bootstrapped clojure accepts `09` as a number, whereas Clojure does not.
https://github.com/clojure/tools.reader/commit/6987dfaf25e2e849765200e098dd1b270916a211 fixed
as reported in http://dev.clojure.org/jira/browse/CLJS-1606, bootstrapped clojure accepts `09` as a number, whereas Clojure does not.