From aab6e892424700bf740f484864207a8f1617c030 Mon Sep 17 00:00:00 2001
From: Daniel Liu <139250065@qq.com>
Date: Mon, 3 Nov 2025 15:14:27 +0800
Subject: [PATCH] core: fix missing `nil` check, close XFN-114 (#1696)

---
 core/blockchain.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/core/blockchain.go b/core/blockchain.go
index 7b28b9b4dc..68b8e4f90c 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -1703,6 +1703,10 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals bool) (int, []
 			var winner []*types.Block
 
 			parent := bc.GetBlock(block.ParentHash(), block.NumberU64()-1)
+			if parent == nil {
+				log.Error("[insertChain] fail to get parent block", "number", block.NumberU64()-1, "hash", block.ParentHash())
+				return i, events, coalescedLogs, fmt.Errorf("fail to get parent block, number: %v, hash: %v", block.NumberU64()-1, block.ParentHash())
+			}
 			for !bc.HasFullState(parent) {
 				winner = append(winner, parent)
 				parent = bc.GetBlock(parent.ParentHash(), parent.NumberU64()-1)