From 5439978a377013a3e951f48915300b56a3010d3c Mon Sep 17 00:00:00 2001
From: Etan Kissling <etan@status.im>
Date: Sun, 19 Jun 2022 07:54:35 +0200
Subject: [PATCH] only process deposits if merkleizer available (#3774)

`m.depositsChain.blocks.len` may change during `startEth1Syncing`. If
that happened, an additional check now ensures that `scratchMerkleizer`
was initialized before attempting to use it.
---
 beacon_chain/eth1/eth1_monitor.nim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/beacon_chain/eth1/eth1_monitor.nim b/beacon_chain/eth1/eth1_monitor.nim
index c080cfb78..b84758d5c 100644
--- a/beacon_chain/eth1/eth1_monitor.nim
+++ b/beacon_chain/eth1/eth1_monitor.nim
@@ -1469,7 +1469,7 @@ proc startEth1Syncing(m: Eth1Monitor, delayBeforeStart: Duration) {.async.} =
         m.terminalBlockHash = some terminalBlockCandidate.hash
         m.terminalBlockNumber = some terminalBlockCandidate.number
 
-    if shouldProcessDeposits:
+    if shouldProcessDeposits and scratchMerkleizer != nil:
       if m.latestEth1BlockNumber <= m.cfg.ETH1_FOLLOW_DISTANCE:
         continue