Obtained Jenkinsfile from 6358ba22586578b9eef2e6cc76d250e1dc6ed758
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
WorkflowScript: 3: unexpected token: testing @ line 3, column 1.
   testing.sayHello('World')
   ^

1 error

	at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:310)
	at org.codehaus.groovy.control.ErrorCollector.addFatalError(ErrorCollector.java:150)
	at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:120)
	at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:132)
	at org.codehaus.groovy.control.SourceUnit.addError(SourceUnit.java:360)
	at org.codehaus.groovy.antlr.AntlrParserPlugin.transformCSTIntoAST(AntlrParserPlugin.java:145)
	at org.codehaus.groovy.antlr.AntlrParserPlugin.parseCST(AntlrParserPlugin.java:111)
	at org.codehaus.groovy.control.SourceUnit.parse(SourceUnit.java:237)
	at org.codehaus.groovy.control.CompilationUnit$1.call(CompilationUnit.java:167)
	at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:931)
	at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:593)
	at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:569)
	at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:546)
	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.reparse(CpsGroovyShell.java:67)
	at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.parseScript(CpsFlowExecution.java:430)
	at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.start(CpsFlowExecution.java:393)
	at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:238)
	at hudson.model.ResourceController.execute(ResourceController.java:98)
	at hudson.model.Executor.run(Executor.java:404)
Finished: FAILURE