title: Issue with run jenkins in pipeline job
body: <p>I use jenkins pipeline for the first time and i want to print into the console "hello world" with pipeline job.</p>
  
  <p>I create my job as below with simple script to print hello world</p>
  
  <p><a href="https://i.stack.imgur.com/LMaZ3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LMaZ3.png" alt="Image pipeline"></a></p>
  
  <p>When i run my job i have like this error :</p>
  
  <pre><code>Running in Durability level: MAX_SURVIVABILITY
  java.lang.AbstractMethodError:org.jenkinsci.plugins.pipeline.modeldefinition.validator.ModelValidatorImpl.validateElement(Lorg/jenkinsci/plugins/pipeline/modeldefinition/ast/ModelASTStageBase;)Z
      at org.jenkinsci.plugins.pipeline.modeldefinition.ast.ModelASTStageBase.validate(ModelASTStageBase.java:49)
      at org.jenkinsci.plugins.pipeline.modeldefinition.ast.ModelASTStage.validate(ModelASTStage.java:67)
      at org.jenkinsci.plugins.pipeline.modeldefinition.ast.ModelASTStages.validate(ModelASTStages.java:38)
      at org.jenkinsci.plugins.pipeline.modeldefinition.ast.ModelASTStages.validate(ModelASTStages.java:32)
      at org.jenkinsci.plugins.pipeline.modeldefinition.ast.ModelASTElement.validate(ModelASTElement.java:256)
      at org.jenkinsci.plugins.pipeline.modeldefinition.ast.ModelASTElement.validate(ModelASTElement.java:247)
      at org.jenkinsci.plugins.pipeline.modeldefinition.ast.ModelASTPipelineDef.validate(ModelASTPipelineDef.java:49)
      at org.jenkinsci.plugins.pipeline.modeldefinition.ast.ModelASTMarkerInterface$validate.call(Unknown Source)
      at org.jenkinsci.plugins.pipeline.modeldefinition.parser.ModelParser.parsePipelineStep(ModelParser.groovy:258)
      at org.jenkinsci.plugins.pipeline.modeldefinition.parser.ModelParser.this$2$parsePipelineStep(ModelParser.groovy)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:498)
      at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:210)
      at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:59)
      at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:174)
      at org.jenkinsci.plugins.pipeline.modeldefinition.parser.ModelParser.parse(ModelParser.groovy:156)
      at sun.reflect.GeneratedMethodAccessor2005.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:498)
      at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
      at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
      at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
      at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
      at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:69)
      at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:174)
      at org.jenkinsci.plugins.pipeline.modeldefinition.parser.ModelParser.parse(ModelParser.groovy:123)
      at org.jenkinsci.plugins.pipeline.modeldefinition.parser.ModelParser.parse(ModelParser.groovy)
      at org.jenkinsci.plugins.pipeline.modeldefinition.parser.GroovyShellDecoratorImpl$1.call(GroovyShellDecoratorImpl.java:78)
      at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1065)
      at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:603)
      at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:581)
      at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:558)
      at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:298)
      at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:268)
      at groovy.lang.GroovyShell.parseClass(GroovyShell.java:688)
      at groovy.lang.GroovyShell.parse(GroovyShell.java:700)
      at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.doParse(CpsGroovyShell.java:142)
      at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.reparse(CpsGroovyShell.java:127)
      at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.parseScript(CpsFlowExecution.java:561)
      at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.start(CpsFlowExecution.java:522)
      at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:327)
      at hudson.model.ResourceController.execute(ResourceController.java:97)
      at hudson.model.Executor.run(Executor.java:429)
  Finished: FAILURE
  </code></pre>