java.lang.IllegalArgumentException: Cannot assign to non-mutable: mta, compiling:(manifold/deferred.clj:453:5) Seems to be caused by this bug: http://dev.clojure.org/jira/browse/CLJ-1075
java.lang.IllegalArgumentException: Cannot assign to non-mutable: mta, compiling:(manifold/deferred.clj:453:5)
Seems to be caused by this bug: http://dev.clojure.org/jira/browse/CLJ-1075