From b6307c42e095c6f8e9e7c2518fb1004cc8f201a1 Mon Sep 17 00:00:00 2001
From: William Banfield <4561443+williambanfield@users.noreply.github.com>
Date: Tue, 18 Jan 2022 19:57:00 -0500
Subject: [PATCH] consensus: check proposal non-nil in prevote message delay
 metric (#7625)

---
 internal/consensus/state.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/internal/consensus/state.go b/internal/consensus/state.go
index 17d032464..eb4b6b2c6 100644
--- a/internal/consensus/state.go
+++ b/internal/consensus/state.go
@@ -2399,11 +2399,16 @@ func (cs *State) checkDoubleSigningRisk(height int64) error {
 }
 
 func (cs *State) calculatePrevoteMessageDelayMetrics() {
+	if cs.Proposal == nil {
+		return
+	}
 	ps := cs.Votes.Prevotes(cs.Round)
 	pl := ps.List()
+
 	sort.Slice(pl, func(i, j int) bool {
 		return pl[i].Timestamp.Before(pl[j].Timestamp)
 	})
+
 	var votingPowerSeen int64
 	for _, v := range pl {
 		_, val := cs.Validators.GetByAddress(v.ValidatorAddress)