java.lang.ClassCastException: org.codehaus.groovy.ast.stmt.ReturnStatement cannot be cast to org.codehaus.groovy.ast.stmt.BlockStatement
        at org.codehaus.groovy.classgen.FinalVariableAnalyzer.fallsThrough(FinalVariableAnalyzer.java:480)
        at org.codehaus.groovy.classgen.FinalVariableAnalyzer.visitSwitch(FinalVariableAnalyzer.java:344)
        at org.codehaus.groovy.ast.stmt.SwitchStatement.visit(SwitchStatement.java:53)
        at org.codehaus.groovy.ast.CodeVisitorSupport.visitBlockStatement(CodeVisitorSupport.java:86)
        at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitBlockStatement(ClassCodeVisitorSupport.java:106)
        at org.codehaus.groovy.classgen.FinalVariableAnalyzer.visitBlockStatement(FinalVariableAnalyzer.java:147)
        at org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:69)
        at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClassCodeContainer(ClassCodeVisitorSupport.java:110)
        at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitConstructorOrMethod(ClassCodeVisitorSupport.java:121)
        at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitMethod(ClassCodeVisitorSupport.java:132)
        at org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1103)
        at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:54)
        at org.codehaus.groovy.classgen.Verifier.checkFinalVariables(Verifier.java:263)
        at org.codehaus.groovy.classgen.Verifier.visitClass(Verifier.java:258)
        at org.codehaus.groovy.control.CompilationUnit$18.call(CompilationUnit.java:811)
        at org.codehaus.groovy.control.CompilationUnit$18.call(CompilationUnit.java:871)
        at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1084)
        at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:640)
        at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:618)
        at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:595)
        at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:574)
        at org.gradle.api.internal.tasks.compile.ApiGroovyCompiler.execute(ApiGroovyCompiler.java:268)
        at org.gradle.api.internal.tasks.compile.ApiGroovyCompiler.execute(ApiGroovyCompiler.java:68)
        at org.gradle.api.internal.tasks.compile.GroovyCompilerFactory$DaemonSideCompiler.execute(GroovyCompilerFactory.java:87)
        at org.gradle.api.internal.tasks.compile.GroovyCompilerFactory$DaemonSideCompiler.execute(GroovyCompilerFactory.java:75)
        at org.gradle.api.internal.tasks.compile.daemon.AbstractDaemonCompiler$CompilerWorkAction.execute(AbstractDaemonCompiler.java:113)
        at org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:50)
        at org.gradle.workers.internal.AbstractClassLoaderWorker$1.create(AbstractClassLoaderWorker.java:47)
        at org.gradle.workers.internal.AbstractClassLoaderWorker$1.create(AbstractClassLoaderWorker.java:37)
        at org.gradle.internal.classloader.ClassLoaderUtils.executeInClassloader(ClassLoaderUtils.java:98)
        at org.gradle.workers.internal.AbstractClassLoaderWorker.executeInClassLoader(AbstractClassLoaderWorker.java:37)
        at org.gradle.workers.internal.IsolatedClassloaderWorker.execute(IsolatedClassloaderWorker.java:49)
        at org.gradle.workers.internal.WorkerDaemonServer.execute(WorkerDaemonServer.java:84)
        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.gradle.process.internal.worker.request.WorkerAction$1.call(WorkerAction.java:129)
        at org.gradle.process.internal.worker.child.WorkerLogEventListener.withWorkerLoggingProtocol(WorkerLogEventListener.java:41)
        at org.gradle.process.internal.worker.request.WorkerAction.run(WorkerAction.java:126)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
        at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
        at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182)
        at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164)
        at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:412)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
        at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
        at java.lang.Thread.run(Thread.java:748)