alibaba / alibaba/fastjson2

[BUG]字符串包含NaN等特殊Double值时,反序列化成JSONObject时报错

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bug
Dominant language
Java
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Description

### 问题描述
字符串包含NaN等特殊Double值时,反序列化成JSONObject时报错

### 环境信息
*请填写以下信息:*

- JDK信息: Openjdk 1.8.0_272]
- 版本信息:Fastjson 2.0.54 (兼容包)

### 重现步骤
*如何操作可以重现该问题:*

1. 使用 `JSONObject.parseObject()` 方法
2. 输入 `{"scores":[[0.88,0.18],[NaN,NaN]}` 数据
3. 出现 `com.alibaba.fastjson2.JSONException: offset 25, character N, line 1, column 25, fastjson-version 2.0.54 {"scores":[[0.88,0.18],[NaN,NaN]}` 错误
```
//示例代码
String json = "{\"scores\":[[0.88,0.18],[NaN,NaN]}";
JSONObject obj = JSONObject.parseObject(json);
System.out.println(obj);
```

### 期待的正确结果
期望可以正常反序列化,或者提供相关Feature支持特殊Double值的反序列化

### 相关日志输出
Caused by: com.alibaba.fastjson2.JSONException: offset 25, character N, line 1, column 25, fastjson-version 2.0.54 {"scores":[[0.88,0.18],[NaN,NaN]}
at com.alibaba.fastjson2.JSONReader.readArray(JSONReader.java:2724)
at com.alibaba.fastjson2.JSONReader.readArray(JSONReader.java:2681)
at com.alibaba.fastjson2.JSONReader.read(JSONReader.java:2201)
at com.alibaba.fastjson.JSON.parseObject(JSON.java:189)
... 46 more

#### 附加信息
*如果你还有其他需要提供的信息,可以在这里填写(可以提供截图、视频等)。*

Contributor guide

Open the contributing guide

Research direction

Start with the supplied JSONObject.parseObject() reproduction and the JSONReader.java stack frames, especially readArray. Check how the parser handles NaN in the reported Fastjson 2.0.54 compatibility package. Done means the example deserializes successfully, or the supported feature behavior is clearly covered by a test.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
backend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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