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Failed to initialize
java.lang.ClassCircularityError: org/jruby/RubyClass	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Unknown Source)	at org.jenkinsci.bytecode.ClassWriter.loadClass(ClassWriter.java:97)	at org.jenkinsci.bytecode.ClassWriter.getCommonSuperClass(ClassWriter.java:64)	at org.kohsuke.asm5.ClassWriter.getMergedType(ClassWriter.java:1654)	at org.kohsuke.asm5.Frame.merge(Frame.java:1426)	at org.kohsuke.asm5.Frame.merge(Frame.java:1374)	at org.kohsuke.asm5.MethodWriter.visitMaxs(MethodWriter.java:1475)	at org.kohsuke.asm5.tree.MethodNode.accept(MethodNode.java:833)	at org.kohsuke.asm5.commons.JSRInlinerAdapter.visitEnd(JSRInlinerAdapter.java:187)	at org.jenkinsci.bytecode.Transformer$1$1.visitEnd(Transformer.java:107)	at org.kohsuke.asm5.MethodVisitor.visitEnd(MethodVisitor.java:877)	at org.kohsuke.asm5.ClassReader.readMethod(ClassReader.java:1021)	at org.kohsuke.asm5.ClassReader.accept(ClassReader.java:693)	at org.kohsuke.asm5.ClassReader.accept(ClassReader.java:506)	at org.jenkinsci.bytecode.Transformer.transform(Transformer.java:113)	at hudson.ClassicPluginStrategy$AntClassLoader2.defineClassFromData(ClassicPluginStrategy.java:800)	at jenkins.util.AntClassLoader.getClassFromStream(AntClassLoader.java:1310)	at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:1366)	at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:1326)	at jenkins.util.AntClassLoader.loadClass(AntClassLoader.java:1079)	at java.lang.ClassLoader.loadClass(Unknown Source)	at org.jenkinsci.jruby.RubyClassConverter.(RubyClassConverter.java:12)	at org.jenkinsci.jruby.JRubyXStream.register(JRubyXStream.java:25)	at ruby.RubyRuntimePlugin.initRubyXStreams(RubyRuntimePlugin.java:44)	at ruby.RubyRuntimePlugin.start(RubyRuntimePlugin.java:28)	at hudson.ClassicPluginStrategy.startPlugin(ClassicPluginStrategy.java:449)	at hudson.ClassicPluginStrategy.load(ClassicPluginStrategy.java:438)	at hudson.PluginManager$2$1$1.run(PluginManager.java:384)	at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169)	at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:282)	at jenkins.model.Jenkins$8.runTask(Jenkins.java:915)	at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:210)	at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)	at java.lang.Thread.run(Unknown Source)