[no project] tmp $ set ABC 
***ERROR*** Exception encountered: (type "set VERBOSE false" to disable stack traces)
java.lang.NullPointerException
	at org.jboss.forge.shell.plugins.builtin.Echo.tokensToString(Echo.java:52)
	at org.jboss.forge.shell.plugins.builtin.SetPlugin.run(SetPlugin.java:53)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.jboss.forge.shell.command.Execution.perform(Execution.java:160)
	at org.jboss.forge.shell.command.fshparser.FSHRuntime.run(FSHRuntime.java:109)
	at org.jboss.forge.shell.command.fshparser.FSHRuntime.run(FSHRuntime.java:47)
	at org.jboss.forge.shell.ShellImpl$ExecutorThread.run(ShellImpl.java:795)
	at org.jboss.forge.shell.ShellImpl.execute(ShellImpl.java:818)
	at org.jboss.forge.shell.ShellImpl.doShell(ShellImpl.java:608)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.jboss.weld.bean.proxy.AbstractBeanInstance.invoke(AbstractBeanInstance.java:48)
	at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:125)
	at org.jboss.forge.shell.ShellImpl$Proxy$_$$_WeldClientProxy.doShell(ShellImpl$Proxy$_$$_WeldClientProxy.java)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.jboss.weld.util.reflection.SecureReflections$13.work(SecureReflections.java:305)
	at org.jboss.weld.util.reflection.SecureReflectionAccess.run(SecureReflectionAccess.java:54)
	at org.jboss.weld.util.reflection.SecureReflectionAccess.runAsInvocation(SecureReflectionAccess.java:163)
	at org.jboss.weld.util.reflection.SecureReflections.invoke(SecureReflections.java:299)
	at org.jboss.weld.introspector.jlr.WeldMethodImpl.invokeOnInstance(WeldMethodImpl.java:188)
	at org.jboss.weld.introspector.ForwardingWeldMethod.invokeOnInstance(ForwardingWeldMethod.java:59)
	at org.jboss.weld.injection.MethodInjectionPoint.invokeOnInstanceWithSpecialValue(MethodInjectionPoint.java:198)
	at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:282)
	at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:265)
	at org.jboss.weld.event.ObserverMethodImpl.notify(ObserverMethodImpl.java:234)
	at org.jboss.weld.manager.BeanManagerImpl.notifyObservers(BeanManagerImpl.java:635)
	at org.jboss.weld.manager.BeanManagerImpl.fireEvent(BeanManagerImpl.java:622)
	at org.jboss.weld.manager.BeanManagerImpl.fireEvent(BeanManagerImpl.java:616)
	at org.jboss.forge.shell.Bootstrap$1.run(Bootstrap.java:186)
	at java.lang.Thread.run(Thread.java:722)