From a32e68b8c4179b33963fd80dc9cfa03c75b79d52 Mon Sep 17 00:00:00 2001
From: zhuangdeshuai <32005730+zhuangdeshuai@users.noreply.github.com>
Date: Wed, 3 Jan 2024 19:22:33 +0800
Subject: [PATCH] =?UTF-8?q?[fix]=20=E4=BF=AE=E5=A4=8D=20fastjson2=20?=
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* [fix] 修复 fastjson2 在反序列化列表对象存在引用关系时，存在数据数组越界或者数据丢失的问题
---
 core/src/main/java/com/alibaba/fastjson2/JSONReader.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/core/src/main/java/com/alibaba/fastjson2/JSONReader.java b/core/src/main/java/com/alibaba/fastjson2/JSONReader.java
index 1fdb877463..09d4283a16 100644
--- a/core/src/main/java/com/alibaba/fastjson2/JSONReader.java
+++ b/core/src/main/java/com/alibaba/fastjson2/JSONReader.java
@@ -451,7 +451,11 @@ public final void handleResolveTasks(Object root) {
                         if (index == list.size()) {
                             list.add(fieldValue);
                         } else {
-                            list.set(index, fieldValue);
+                            if (index < list.size() && list.get(index) == null) {
+                                list.set(index, fieldValue);
+                            } else {
+                                list.add(index, fieldValue);
+                            }
                         }
                         continue;
                     }