From 4702440eff296a22d7af9f96370942e861a278b1 Mon Sep 17 00:00:00 2001
From: ywzqwwt <752252086@qq.com>
Date: Fri, 22 Feb 2019 15:09:51 +0800
Subject: [PATCH] core/snailchain.go: update the for loop in find common
 ancestor

---
 core/blockchain.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/blockchain.go b/core/blockchain.go
index 54ca6d33d4..3d11f912b3 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -1340,7 +1340,7 @@ func (bc *BlockChain) insertSidechain(it *insertIterator) (int, []interface{}, [
 		numbers []uint64
 	)
 	parent := bc.GetHeader(it.previous().Hash(), it.previous().NumberU64())
-	for parent != nil && !bc.HasState(parent.Root) {
+	for parent != nil && rawdb.ReadCanonicalHash(bc.db, parent.Number.Uint64()) != parent.Hash() {
 		hashes = append(hashes, parent.Hash())
 		numbers = append(numbers, parent.Number.Uint64())