From 976bea43c6f2309c43e92620f1cebef732f0b905 Mon Sep 17 00:00:00 2001
From: Alan Orwick <alan.kev11@gmail.com>
Date: Thu, 21 Jul 2022 16:46:40 -0500
Subject: [PATCH] downloader.go: catch nil header

---
 eth/downloader/queue.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/eth/downloader/queue.go b/eth/downloader/queue.go
index 60f9437f3a..2f12a690b6 100644
--- a/eth/downloader/queue.go
+++ b/eth/downloader/queue.go
@@ -337,6 +337,10 @@ func (q *queue) Schedule(headers []*types.Header, from uint64) []*types.Header {
 	for _, header := range headers {
 		// Make sure chain order is honoured and preserved throughout
 		hash := header.Hash()
+		if header == nil {
+			log.Warn("Header nil", "expected", from)
+			break
+		}
 		if header.Number == nil || header.Number[types.QuaiNetworkContext].Uint64() != from {
 			log.Warn("Header broke chain ordering", "number", header.Number, "hash", hash, "expected", from)
 			break