From 7f782b136ee470f0e14ba67f5f0c7ed6aec3b9a7 Mon Sep 17 00:00:00 2001
From: rjl493456442 <garyrong0905@gmail.com>
Date: Thu, 27 Jun 2019 16:54:19 +0800
Subject: [PATCH] core: prevent reverting valid section when reorg happens

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

diff --git a/core/chain_indexer.go b/core/chain_indexer.go
index f91e3fd909..455f9f093a 100644
--- a/core/chain_indexer.go
+++ b/core/chain_indexer.go
@@ -243,7 +243,7 @@ func (c *ChainIndexer) newHead(head uint64, reorg bool) {
 	// If a reorg happened, invalidate all sections until that point
 	if reorg {
 		// Revert the known section number to the reorg point
-		known := head / c.sectionSize
+		known := (head + 1) / c.sectionSize
 		stored := known
 		if known < c.checkpointSections {
 			known = 0