JMeter-jexl3函数无法声明局部变量

我正在使用最新的JMeter 4并尝试使用basic jexl syntax 在中声明局部变量的 jexl function

可以使用var关键字定义局部变量;它们的识别规则与上下文变量相同。 基本声明:var x;

所以在JMeter我试过

${__jexl2(var x;)}

并成功,但使用 ${__jexl3(var x;)} 它引发解析器异常:

2018-04-25 14:18:16,451 ERROR o.a.j.f.Jexl3Function: An error occurred while evaluating the expression "var a;"

org.apache.commons.jexl3.JexlException$Parsing: @1:1 parsing error in 'var'
    at org.apache.commons.jexl3.JexlEngine.createExpression(JexlEngine.java:304) ~[commons-jexl3-3.1.jar:3.1]
    at org.apache.jmeter.functions.Jexl3Function.execute(Jexl3Function.java:94) [ApacheJMeter_functions.jar:4.0 r1823414]
    at org.apache.jmeter.engine.util.CompoundVariable.execute(CompoundVariable.java:137) [ApacheJMeter_core.jar:4.0 r1823414]
    at org.apache.jmeter.engine.util.CompoundVariable.execute(CompoundVariable.java:112) [ApacheJMeter_core.jar:4.0 r1823414]
    at org.apache.jmeter.testelement.property.FunctionProperty.getStringValue(FunctionProperty.java:101) [ApacheJMeter_core.jar:4.0 r1823414]
    at org.apache.jmeter.testelement.AbstractTestElement.getPropertyAsString(AbstractTestElement.java:281) [ApacheJMeter_core.jar:4.0 r1823414]
    at org.apache.jmeter.testelement.AbstractTestElement.getName(AbstractTestElement.java:165) [ApacheJMeter_core.jar:4.0 r1823414]
    at org.apache.jmeter.sampler.DebugSampler.sample(DebugSampler.java:56) [ApacheJMeter_components.jar:4.0 r1823414]
    at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:490) [ApacheJMeter_core.jar:4.0 r1823414]
    at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:416) [ApacheJMeter_core.jar:4.0 r1823414]
    at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:250) [ApacheJMeter_core.jar:4.0 r1823414]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_25]

是JMeter问题还是jexl3问题,还是我遗漏了什么?

编辑

除了无法解析var之外,它还无法解析 ; ,下面是一个使用jexl2但使用jexl3失败的工作示例:

${__jexl3(abc=new("java.util.ArrayList"\, 1);)}