What does the exception below mean? Does trampoline require something to be
defined/included that the usual way doesn't?
Exception in thread "main" java.lang.IllegalArgumentException: No
implementation of method: :make-writer of protocol:
#'clojure.java.io/IOFactory found for class: nil (NO_SOURCE_FILE:0)
at clojure.lang.Compiler.eval(Compiler.java:5440)
at clojure.lang.Compiler.eval(Compiler.java:5391)
at clojure.core$eval.invoke(core.clj:2382)
at clojure.main$eval_opt.invoke(main.clj:235)
at clojure.main$initialize.invoke(main.clj:254)
at clojure.main$script_opt.invoke(main.clj:270)
at clojure.main$main.doInvoke(main.clj:354)
at clojure.lang.RestFn.invoke(RestFn.java:483)
at clojure.lang.Var.invoke(Var.java:381)
at clojure.lang.AFn.applyToHelper(AFn.java:180)
at clojure.lang.Var.applyTo(Var.java:482)
at clojure.main.main(main.java:37)
Caused by: java.lang.IllegalArgumentException: No implementation of method:
:make-writer of protocol: #'clojure.java.io/IOFactory found for class: nil
at clojure.core$_cache_protocol_fn.invoke(core_deftype.clj:471)
at clojure.java.io$fn__7420$G__7374__7427.invoke(io.clj:63)
at clojure.java.io$writer.doInvoke(io.clj:113)
at clojure.lang.RestFn.invoke(RestFn.java:411)
at clojure.lang.AFn.applyToHelper(AFn.java:163)
at clojure.lang.RestFn.applyTo(RestFn.java:133)
at clojure.core$apply.invoke(core.clj:542)
at clojure.core$spit.doInvoke(core.clj:5385)
at clojure.lang.RestFn.invoke(RestFn.java:426)
at leiningen.trampoline$write_trampoline.invoke(trampoline.clj:32)
at leiningen.trampoline$trampoline.doInvoke(trampoline.clj:57)
at clojure.lang.RestFn.invoke(RestFn.java:426)
at clojure.lang.Var.invoke(Var.java:369)
at clojure.lang.AFn.applyToHelper(AFn.java:165)
at clojure.lang.Var.applyTo(Var.java:482)
at clojure.core$apply.invoke(core.clj:542)
at leiningen.core$apply_task.invoke(core.clj:228)
at leiningen.core$_main.doInvoke(core.clj:294)
at clojure.lang.RestFn.applyTo(RestFn.java:140)
at clojure.core$apply.invoke(core.clj:542)
at leiningen.core$_main.invoke(core.clj:297)
at user$eval42.invoke(NO_SOURCE_FILE:1)
at clojure.lang.Compiler.eval(Compiler.java:5424)
... 11 more
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