I'm having trouble throwing an exception with the error message I want from
a list of error codes.  Here's a simple example of the problem:

(def messages (map #(str %) [1 2 3]))
(println messages)
(throw (java.lang.Exception. (str "Whoops: " messages)))

The println prints the messages just fine - I see "1 2 3".  However the
exception message contains something like 'clojure.lang.lazy...@13291'
instead of "1 2 3".  Here's a REPL session:

user=> (def messages (map #(str %) [1 2 3]))
#'user/messages
user=> (println messages)
(1 2 3)
nil
user=> (throw (java.lang.Exception. (str "Whoops: " messages)))
java.lang.Exception: Whoops: clojure.lang.lazy...@13291 (NO_SOURCE_FILE:0)


What am I missing?  I want the exception message to display as "Whoops: 1 2
3".

This happens with clojure 1.1 and a recent snapshot of 1.2.

Thanks.

Steve

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