fastjson版本 1.2.75、1.2.83

异常复现代码如下：

public class FastjsonTest {

    public static void main(String[] args) {
        String jsonString = "{state:{a:{check:['x','y']},b:{}},view:[{id:'a',name:'an'},{id:'b',name:'bn'}]}";
        System.out.println(JSONPath.eval(JSON.parseObject(jsonString), "$..view"));
        String errorJsonString = "{state:{a:{check:['x',null,'y']},b:{}},view:[{id:'a',name:'an'},{id:'b',name:'bn'}]}";
        System.out.println(JSONPath.eval(JSON.parseObject(errorJsonString), "$..view"));
    }

}

示例代码里的 errorJsonString 相比 jsonString 中间的check数组多了一个 null 元素。

1.2.83版本下的异常堆栈

Exception in thread "main" java.lang.NullPointerException
	at com.alibaba.fastjson.JSONPath.deepScan(JSONPath.java:4034)
	at com.alibaba.fastjson.JSONPath.deepScan(JSONPath.java:4024)
	at com.alibaba.fastjson.JSONPath.deepScan(JSONPath.java:4024)
	at com.alibaba.fastjson.JSONPath.deepScan(JSONPath.java:4024)
	at com.alibaba.fastjson.JSONPath$PropertySegment.eval(JSONPath.java:2350)
	at com.alibaba.fastjson.JSONPath.eval(JSONPath.java:121)
	at com.alibaba.fastjson.JSONPath.eval(JSONPath.java:642)
	at FastjsonTest.main(FastjsonTest.java:16)