def lst = ['a', 'bc', 'def']
echo "Lst: $lst"

// Works
def str = String.join('\n', lst.toArray(new String[lst.size()]))
echo "Str: $str"

// Doesn't work
def str2 = String.join('\n', lst)
echo "Str2: ${str2}"

Started by user dsobral
DatadogBuildListener.java: Started build!
DatadogBuildListener.java: Using unix hostname found via `/bin/hostname -f`. Hostname: sfdev-061.richrelevance.com
DatadogBuildListener.java: Sending event
DatadogBuildListener.java: API call of type 'v1/events' was sent successfully!
DatadogBuildListener.java: Payload: {"alert_type":"info","title":"string_join_test build #5 started on sfdev-061.richrelevance.com","text":"%%% \n [Follow build #5 progress](https://jenkins.richrelevance.com/job/string_join_test/5/)  \n %%%","date_happened":1471555196,"event_type":"build start","host":"sfdev-061.richrelevance.com","tags":["job:string_join_test"],"aggregation_key":"string_join_test"}
[Pipeline] echo
Lst: [a, bc, def]
[Pipeline] echo
Str: a
bc
def
[Pipeline] End of Pipeline
[BFA] Scanning build for known causes...
[BFA] No failure causes found
[BFA] Done. 0s
DatadogBuildListener.java: Completed build!
DatadogBuildListener.java: Using unix hostname found via `/bin/hostname -f`. Hostname: sfdev-061.richrelevance.com
DatadogBuildListener.java: Sending event
DatadogBuildListener.java: API call of type 'v1/events' was sent successfully!
DatadogBuildListener.java: Payload: {"source_type_name":"jenkins","alert_type":"failure","title":"string_join_test build #5 failed on sfdev-061.richrelevance.com","text":"%%% \n [See results for build #5](https://jenkins.richrelevance.com/job/string_join_test/5/) (0.0 secs) \n %%%","date_happened":1471555196,"event_type":"build result","host":"sfdev-061.richrelevance.com","result":"FAILURE","tags":["job:string_join_test","result:FAILURE"],"aggregation_key":"string_join_test"}
DatadogBuildListener.java: Sending metric 'jenkins.job.duration' with value 0.0
DatadogBuildListener.java: API call of type 'v1/series' was sent successfully!
DatadogBuildListener.java: Payload: {"series":[{"metric":"jenkins.job.duration","points":[[1471555199,0]],"type":"gauge","host":"sfdev-061.richrelevance.com","tags":["job:string_join_test","result:FAILURE"]}]}
DatadogBuildListener.java: Sending service check 'jenkins.job.status' with status 2
DatadogBuildListener.java: API call of type 'v1/check_run' was sent successfully!
DatadogBuildListener.java: Payload: {"check":"jenkins.job.status","host_name":"sfdev-061.richrelevance.com","timestamp":1471555199,"status":2,"tags":["job:string_join_test","result:FAILURE"]}
java.lang.IllegalArgumentException: array element type mismatch
	at java.lang.reflect.Array.set(Native Method)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovyCallSiteSelector.parametersForVarargs(GroovyCallSiteSelector.java:102)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovyCallSiteSelector.matches(GroovyCallSiteSelector.java:49)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovyCallSiteSelector.findMatchingMethod(GroovyCallSiteSelector.java:177)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovyCallSiteSelector.staticMethod(GroovyCallSiteSelector.java:171)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onStaticCall(SandboxInterceptor.java:135)
	at org.kohsuke.groovy.sandbox.impl.Checker$2.call(Checker.java:180)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedStaticCall(Checker.java:177)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:91)
	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:16)
	at WorkflowScript.run(WorkflowScript:9)
	at ___cps.transform___(Native Method)
	at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:48)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:109)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:82)
	at sun.reflect.GeneratedMethodAccessor852.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
	at com.cloudbees.groovy.cps.impl.LocalVariableBlock$LocalVariable.get(LocalVariableBlock.java:33)
	at com.cloudbees.groovy.cps.LValueBlock$GetAdapter.receive(LValueBlock.java:30)
	at com.cloudbees.groovy.cps.impl.LocalVariableBlock.evalLValue(LocalVariableBlock.java:22)
	at com.cloudbees.groovy.cps.LValueBlock$BlockImpl.eval(LValueBlock.java:55)
	at com.cloudbees.groovy.cps.LValueBlock.eval(LValueBlock.java:16)
	at com.cloudbees.groovy.cps.Next.step(Next.java:58)
	at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:154)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:18)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:33)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:30)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovySandbox.runInSandbox(GroovySandbox.java:108)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:30)
	at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:164)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:360)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$100(CpsThreadGroup.java:80)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:236)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:226)
	at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:47)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)
	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Finished: FAILURE