IllegalArgumentException Parameter declaration println should be a vector  clojure.core/assert-valid-fdecl (core.clj:6682)
=> (pst)
IllegalArgumentException Parameter declaration println should be a vector
    clojure.core/assert-valid-fdecl (core.clj:6682)
    clojure.core/sigs (core.clj:220)
    clojure.core/defn (core.clj:298)
    clojure.lang.Var.invoke (Var.java:431)
    clojure.lang.Var.applyTo (Var.java:532)
    clojure.lang.Compiler.macroexpand1 (Compiler.java:6452)
    clojure.lang.Compiler.macroexpand (Compiler.java:6513)
    clojure.lang.Compiler.eval (Compiler.java:6587)
    clojure.lang.Compiler.load (Compiler.java:7047)
    datest1.core/eval2453 (NO_SOURCE_FILE:1)
    clojure.lang.Compiler.eval (Compiler.java:6603)
    clojure.lang.Compiler.eval (Compiler.java:6566)
nil