From bd3e2600fdfebdbdfc1762e63d90641c3b931693 Mon Sep 17 00:00:00 2001
From: Daniel Liu <liudaniel@qq.com>
Date: Mon, 18 Dec 2023 10:49:40 +0800
Subject: [PATCH] eth/downloader: make Broadcast run after Wait (#264)

---
 eth/downloader/queue.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/eth/downloader/queue.go b/eth/downloader/queue.go
index fca2e54875..2a093f075b 100644
--- a/eth/downloader/queue.go
+++ b/eth/downloader/queue.go
@@ -146,6 +146,9 @@ func (q *queue) Reset() {
 // Close marks the end of the sync, unblocking WaitResults.
 // It may be called even if the queue is already closed.
 func (q *queue) Close() {
+	q.lock.Lock()
+	defer q.lock.Unlock()
+
 	q.closed = true
 	q.active.Broadcast()
 }