script.cachedDataRejected
当提供 cachedData 来创建 vm.Script 时，该值将根据 V8 对数据的接受情况设置为 true 或 false。
否则值为 undefined。
When cachedData is supplied to create the vm.Script, this value will be set
to either true or false depending on acceptance of the data by V8.
Otherwise the value is undefined.