From 08bb58b482cb44c7fb933c41c3b9f98af6422f80 Mon Sep 17 00:00:00 2001
From: Martin Holst Swende <martin@swende.se>
Date: Thu, 15 Aug 2024 15:00:22 +0200
Subject: [PATCH] eth/protocols/eth: handle Count Zero

---
 eth/protocols/eth/handlers.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/eth/protocols/eth/handlers.go b/eth/protocols/eth/handlers.go
index bdc630a9f4..c79d8f7c04 100644
--- a/eth/protocols/eth/handlers.go
+++ b/eth/protocols/eth/handlers.go
@@ -144,6 +144,9 @@ func serviceContiguousBlockHeaderQuery(chain *core.BlockChain, query *GetBlockHe
 	if count > maxHeadersServe {
 		count = maxHeadersServe
 	}
+	if count == 0 {
+		return nil
+	}
 	if query.Origin.Hash == (common.Hash{}) {
 		// Number mode, just return the canon chain segment. The backend
 		// delivers in [N, N-1, N-2..] descending order, so we need to