java.lang.NullPointerException
 	at org.jenkinsci.plugins.workflow.steps.GeneralNonBlockingStepExecution$TailCall.onSuccess(GeneralNonBlockingStepExecution.java:138)
 	at org.jenkinsci.plugins.workflow.cps.CpsBodyExecution$SuccessAdapter.receive(CpsBodyExecution.java:377)
 	at com.cloudbees.groovy.cps.Outcome.resumeFrom(Outcome.java:73)
 	at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:166)
 	at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:163)
 	at org.codehaus.groovy.runtime.GroovyCategorySupport$ThreadCategoryInfo.use(GroovyCategorySupport.java:129)
 	at org.codehaus.groovy.runtime.GroovyCategorySupport.use(GroovyCategorySupport.java:268)
 	at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:163)
 	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:18)
 	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:51)
 	at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:185)
 	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:400)
 	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$400(CpsThreadGroup.java:96)
 	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:312)
 	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:276)
 	at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:67)
 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
 	at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:136)
 	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
 	at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
 	at java.lang.Thread.run(Thread.java:748)