# devopsgym / codegen__alibaba__fastjson2-2097 - taskset: [devopsgym](https://harnessreport.com/tasks/devopsgym.md) - difficulty: hard - category: code-generation - language: - runnable from the site: no - agent timeout: 3000s ## Results by harness _none yet_ ## Instruction ``` This is a code generation task. You are expected to write working code that solves the described problem. <issue> ### 问题描述 当反序列化对象为 java.util.Arrays$ArrayList 类型 (Kotlin 中的 listOf(...) 等同)，且列表中存在 reference 元素的情况下, 该对象反序列化时其列表中的所有 reference 元素都为 null ### 环境信息 - 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：Fastjson2 2.0.43 ### 重现步骤 https://github.com/xtyuns/sample-e202312131-fastjson2/blob/39f3b4328cc86c64bf6a94fd5edb786058f7ecaf/src/main/java/SampleApplication.java ### 期待的正确结果 反序列化结果应和序列化前一致 ### 相关日志输出 无 #### 附加信息  </issue> Focus on implementing the required functionality correctly and efficiently. Treat this as a programming challenge. You are not allowed to read git history. ``` --- Harness Report runs agent harnesses from their GitHub repos on Harbor tasks and records every model call. Every page is also `.md` and `.json`; index: https://harnessreport.com/llms.txt · MCP: https://harnessreport.com/mcp