java - IOKE シェルでコードを実行しようとすると、エラーが発生しますか?

Question

IOKE シェルでコードを実行しようとすると、クラッシュします。

 >ioke
 iik> "Hello World" println
Exception in thread "main" java.lang.NullPointerException
            at ioke.lang.IokeIO$2.activate(IokeIO.java:129)
            at ioke.lang.TypeCheckingNativeMethod.activate(TypeCheckingNativeMethod.java:50)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateCompleteWithoutExplicitReceiver(Message.java:1145)
            at ioke.lang.Message.getEvaluatedArgument(Message.java:979)
            at ioke.lang.Message.getEvaluatedArgument(Message.java:983)
            at ioke.lang.FlowControlBehavior$9.activate(FlowControlBehavior.java:379)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Locals$1.activate(Locals.java:63)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateCompleteWith(Message.java:1093)
            at ioke.lang.LexicalBlock.activate(LexicalBlock.java:198)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.LexicalBlock$2.activate(LexicalBlock.java:86)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:1011)
            at ioke.lang.FileSystem$7.activate(FileSystem.java:308)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateCompleteWithoutExplicitReceiver(Message.java:1145)
            at ioke.lang.ConditionsBehavior$4.activate(ConditionsBehavior.java:342)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Locals$1.activate(Locals.java:63)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateCompleteWithoutExplicitReceiver(Message.java:1145)
            at ioke.lang.Message.getEvaluatedArgument(Message.java:979)
            at ioke.lang.Message.getEvaluatedArgument(Message.java:983)
            at ioke.lang.FlowControlBehavior$7.activate(FlowControlBehavior.java:298)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Locals$1.activate(Locals.java:63)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateCompleteWithoutExplicitReceiver(Message.java:1145)
            at ioke.lang.ConditionsBehavior$4.activate(ConditionsBehavior.java:342)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Locals$1.activate(Locals.java:63)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateCompleteWith(Message.java:1093)
            at ioke.lang.DefaultMethod.activate(DefaultMethod.java:283)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateComplete(Message.java:1066)
            at ioke.lang.Runtime.evaluateString(Runtime.java:525)
            at ioke.lang.Main.main(M

ain.java:149)

これがエラーになる原因は何ですか? 私は Windows 10 を使用しており、IOKE_HOME および JAVA_HOME 環境変数が設定されています (そうしないと、そもそも REPL が呼び出されません)。どんな助けでも大歓迎です。