From b49f3bf2c5b5284f713c4ceaf189ee4978c150a1 Mon Sep 17 00:00:00 2001
From: rjl493456442 <garyrong0905@gmail.com>
Date: Tue, 16 Jul 2019 17:01:28 +0800
Subject: [PATCH] core: add rlock for pendingState read access

---
 core/tx_pool.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/tx_pool.go b/core/tx_pool.go
index f54ab47417..6bcb97b0c6 100644
--- a/core/tx_pool.go
+++ b/core/tx_pool.go
@@ -420,6 +420,9 @@ func (pool *TxPool) SetGasPrice(price *big.Int) {
 // Nonce returns the next nonce of an account, with all transactions executable
 // by the pool already applied on top.
 func (pool *TxPool) Nonce(addr common.Address) uint64 {
+	pool.mu.RLock()
+	defer pool.mu.RUnlock()
+
 	return pool.pendingNonces.get(addr)
 }