Bug: Unable to load org.clojure/core.memoize library 0.5.3+

[chrisfjones]

Given the following project.clj:

(defproject memoize-test "0.1.0-SNAPSHOT"
  :dependencies [[org.clojure/clojure "1.5.1"]
                 [org.clojure/core.memoize "0.5.6"]]
  :main memoize-test.core)

... and the following code

(ns memoize-test.core
  (:require [clojure.core.memoize :as memo]))

(def memo+ (memo/memo +))
(defn -main []
  (println (memo+ 1 1)))

... when loaded up in LT, produces the following errors:

java.lang.Exception: namespace 'clojure.core.memoize' not found
            core.clj:5380 clojure.core/load-lib
          RestFn.java:142 clojure.lang.RestFn.applyTo
             core.clj:619 clojure.core/apply
            core.clj:5413 clojure.core/load-libs
          RestFn.java:137 clojure.lang.RestFn.applyTo
             core.clj:619 clojure.core/apply
            core.clj:5496 clojure.core/require
          RestFn.java:408 clojure.lang.RestFn.invoke
         NO_SOURCE_FILE:1 memoize-test.core/eval4911[fn]
         NO_SOURCE_FILE:1 memoize-test.core/eval4911

... and in the context of a larger project has produced:

clojure.lang.Compiler$CompilerException: java.lang.RuntimeException: No such var: clojure.core.cache/through, compiling:(clojure/core/memoize.clj:52:3)
             Compiler.java:6380 clojure.lang.Compiler.analyze
             Compiler.java:6322 clojure.lang.Compiler.analyze
             Compiler.java:3573 clojure.lang.Compiler$InvokeExpr.parse
...

... but works fine via 'lein run' or 'lein repl'

Also, changing the core.memoize version to 0.5.2 in the project.clj will cause the example to load and function perfectly in LT. core.memoize introduced a dependency on core.cache in 0.5.3+, which seems to be the culprit.

[ibdknox]

I'm desperately trying to figure this one out, I can get it to happen, but there's no obvious cause. Everything appears to be correct and only happens with core.memoize. I'm not the only one this seems to happen to either. lein-clojuredocs has a similar issue. I think it may actually be a problem with core.memoize itself.

[dzer6]

Chris,

Try to add [org.clojure/core.cache "0.6.3"] to dependencies in project.clj

PS I found solution here: http://www.raynes.me/logs/irc.freenode.net/clojure/2013-09-11.txt

Andrew

[chrisfjones]

Andrew,
Thanks! Adding that sequence:

[org.clojure/core.cache "0.6.3"]
[org.clojure/core.memoize "0.5.6" :exclusions [org.clojure/core.cache]]

..worked for me (even though memoize 0.5.6 has a transitive dependency on cache 0.6.3 anyway)

Looks like the clojure.core.cache/through function references its own clojure.core.cache namespace before its loaded - https://github.com/clojure/core.cache/blob/master/src/main/clojure/clojure/core/cache.clj#L53? Forcing lein to load that namespace first seems to bypass that problem somehow.

p.s. I'm amazed you were able to glean substance from that chat log ;)

[ibdknox]

fixed in 0.5.5 as far as I can tell.

[sritchie]

I was seeing the same thing when including this namespace from lib-noir:

[noir.util.middleware :as nm]

Problem fixed by explicitly including core.memoize 0.5.6.

[sventech]

I'm seeing the same error in core.memoize 0.5.7 (but not in 0.5.6) and the above solution fixed it.