From 543c87cc3824c035f484d7a899122c9c3765ec4a Mon Sep 17 00:00:00 2001
From: ahrtr <wachao@vmware.com>
Date: Mon, 4 Apr 2022 18:58:18 +0800
Subject: [PATCH] etcd-dump-logs will panic if there is no WAL entry after the
 snapshot

---
 tools/etcd-dump-logs/main.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/etcd-dump-logs/main.go b/tools/etcd-dump-logs/main.go
index cda3dd5b8..82789c810 100644
--- a/tools/etcd-dump-logs/main.go
+++ b/tools/etcd-dump-logs/main.go
@@ -123,8 +123,10 @@ and output a hex encoded line of binary for each input line`)
 	fmt.Printf("WAL metadata:\nnodeID=%s clusterID=%s term=%d commitIndex=%d vote=%s\n",
 		id, cid, state.Term, state.Commit, vid)
 
-	fmt.Printf("WAL entries:\n")
-	fmt.Printf("lastIndex=%d\n", ents[len(ents)-1].Index)
+	fmt.Printf("WAL entries: %d\n", len(ents))
+	if len(ents) > 0 {
+		fmt.Printf("lastIndex=%d\n", ents[len(ents)-1].Index)
+	}
 
 	fmt.Printf("%4s\t%10s\ttype\tdata", "term", "index")
 	if *streamdecoder != "" {