alibaba / alibaba/fastjson2

[BUG]反序列化为JSONobject存在$ref引用,使用SerializerFeature.DisableCircularReferenceDetect会存在循环引用,栈溢出问题,生产环境不适用

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bug
Dominant language
Java
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Description

### 问题描述
*简要描述您碰到的问题。*

### 环境信息
*请填写以下信息:*

- OS信息: [e.g.:CentOS 8.4.2105 4Core 3.10GHz 16 GB]
- JDK信息: [e.g.:Openjdk 1.8.0_312]
- 版本信息:[e.g.:Fastjson2 2.x.x]

### 重现步骤
*如何操作可以重现该问题:*

1. 使用 `xxx.xxx` 方法
2. 输入 `...` 数据
3. 出现 `...` 错误
```java
//可在此输入示例代码
```

### 期待的正确结果
*对您期望发生的结果进行清晰简洁的描述。*

### 相关日志输出
*请复制并粘贴任何相关的日志输出。*

#### 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

The issue provides no concrete source file, test, or callable method; it only identifies Fastjson2 JSON deserialization, $ref references, and SerializerFeature.DisableCircularReferenceDetect. Start by constructing a minimal Java reproduction from those details, then verify that the corrected behavior handles the reference without recursive stack overflow.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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