core.clj

(ns mongo-sandbox.core
  (:use somnium.congomongo))

project.clj

(defproject mongo-sandbox "1.0.0-SNAPSHOT"
  :description "FIXME: write description"
  :dependencies [[org.clojure/clojure "1.2.1"]
		 [congomongo "0.1.9"]]
  :main mongo-sandbox.core)

stacktrace

c:\Program Files (x86)\Clojure Box\emacs\emacs\bin\mongo-sandbox>lein run
lein run
Exception in thread "main" java.lang.NullPointerException (NO_SOURCE_FILE:1)
	at clojure.lang.Compiler.eval(Compiler.java:5440)
	at clojure.lang.Compiler.eval(Compiler.java:5415)
	at clojure.lang.Compiler.eval(Compiler.java:5391)
	at clojure.core$eval.invoke(core.clj:2382)
	at clojure.main$eval_opt.invoke(main.clj:235)
	at clojure.main$initialize.invoke(main.clj:254)
	at clojure.main$null_opt.invoke(main.clj:279)
	at clojure.main$main.doInvoke(main.clj:354)
	at clojure.lang.RestFn.invoke(RestFn.java:421)
	at clojure.lang.Var.invoke(Var.java:369)
	at clojure.lang.AFn.applyToHelper(AFn.java:163)
	at clojure.lang.Var.applyTo(Var.java:482)
	at clojure.main.main(main.java:37)
Caused by: java.lang.NullPointerException
	at user$eval647.invoke(NO_SOURCE_FILE:1)
	at clojure.lang.Compiler.eval(Compiler.java:5424)
	... 12 more