I intended to use a namespace declaration like this:
user> (ns three-tier (:use clojure.contrib.sql))
nil
but I mistakenly typed
user> (ns three-tier (:use (clojure.contrib.sql)))
nil
The latter :use call accomplished nothing, but that bit of knowledge
is hard to come by.
The enclosed patch changes Clojure to check for such a malformed
prefix list and throw an exception with a message that should help
narrow down the problem:
user=> (ns three-tier (:use (clojure.contrib.sql)))
java.lang.Exception: found prefix clojure.contrib.sql, but no name(s)
(NO_SOURCE_FILE:0)
--Steve
Index: src/clj/clojure/boot.clj
===================================================================
--- src/clj/clojure/boot.clj (revision 1081)
+++ src/clj/clojure/boot.clj (working copy)
@@ -3202,6 +3202,7 @@
(apply load-lib nil (prependss arg opts))
(let [[prefix & args] arg]
(throw-if (nil? prefix) "prefix cannot be nil")
+ (throw-if (nil? args) "found prefix %s, but no name(s)"
prefix)
(doseq arg args
(apply load-lib prefix (prependss arg opts))))))))
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