fastjson解析json字符串到java对象，当存在通配符继承Comparable时报堆栈溢出。

[Viyond]

fastjson 版本，从1.2.35到最新1.2.46均试过均存在一下问题；
jdk版本：和jdk版本无关

问题描述：

public class FastJsonTest {

    public static void main(String[] args) {
        IndexQuery_Number query_number = new IndexQuery_Number();
        IndexQuery_Comparable query_comparable = new IndexQuery_Comparable();
        List<Integer> keys = Arrays.asList(1234);
        query_number.setKeys(keys);
        query_comparable.setKeys(keys);

        try{
            System.out.println("======= query with number =======");
            String json1 = JSON.toJSONString(query_number);
            System.out.println(json1);
            IndexQuery_Number queryNumber = JSON.parseObject(json1, new TypeReference<IndexQuery_Number>(){});
            System.out.println(queryNumber);

            System.out.println("\n======= query with comparable =======");
            String json2 = JSON.toJSONString(query_comparable);
            System.out.println(json2);
            IndexQuery_Comparable queryComparable = JSON.parseObject(json2, new TypeReference<IndexQuery_Comparable>(){});
            System.out.println(queryComparable);

        }catch (Throwable e){
            e.printStackTrace();
        }
    }

    static class IndexQuery_Comparable{
        List<? extends Comparable> keys;

        public List<? extends Comparable> getKeys() {
            return keys;
        }

        public void setKeys(List<? extends Comparable> keys) {
            this.keys = keys;
        }

        @Override
        public String toString() {
            return "IndexQuery{" +
                    "keys=" + keys +
                    '}';
        }
    }

    static class IndexQuery_Number{
        List<? extends Number> keys;

        public List<? extends Number> getKeys() {
            return keys;
        }

        public void setKeys(List<? extends Number> keys) {
            this.keys = keys;
        }

        @Override
        public String toString() {
            return "IndexQuery{" +
                    "keys=" + keys +
                    '}';
        }
    }

}

问题现象：
通配符继承Comparable会报堆栈溢出，通配符继承Number则完成正常解析。错误结果输入如下：
======= query with number =======
{"keys":[1234]}
IndexQuery{keys=[1234]}

======= query with comparable =======
{"keys":[1234]}
com.alibaba.fastjson.JSONException
at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:665)
at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:633)
at com.alibaba.fastjson.parser.deserializer.JavaObjectDeserializer.deserialze(JavaObjectDeserializer.java:42)
at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:661)
at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:633)
at com.alibaba.fastjson.parser.deserializer.JavaObjectDeserializer.deserialze(JavaObjectDeserializer.java:42)
at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:661)
………………………………………………
………………………………………………
at com.alibaba.fastjson.parser.deserializer.JavaObjectDeserializer.deserialze(JavaObjectDeserializer.java:42)
at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:661)
Caused by: java.lang.StackOverflowError
at java.lang.Exception.(Exception.java:84)
at java.lang.RuntimeException.(RuntimeException.java:80)
at com.alibaba.fastjson.JSONException.(JSONException.java:33)
at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:665)

[Viyond]

请问下这个issue有人看吗？

[Viyond]

RT

[wenshao]

https://github.com/alibaba/fastjson/releases/tag/1.2.49
问题已修复，请用新版本