From 7f3956152d3295f7943af1caadf7fd31362d8200 Mon Sep 17 00:00:00 2001
From: Martin Holst Swende <martin@swende.se>
Date: Wed, 23 Oct 2019 17:48:35 +0200
Subject: [PATCH] leveldb: fix nil deref

---
 ethdb/leveldb/leveldb.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ethdb/leveldb/leveldb.go b/ethdb/leveldb/leveldb.go
index 83897af709..20bc73c9a0 100644
--- a/ethdb/leveldb/leveldb.go
+++ b/ethdb/leveldb/leveldb.go
@@ -455,7 +455,9 @@ func (b *batch) ValueSize() int {
 
 // Write flushes any accumulated data to disk.
 func (b *batch) Write() error {
-	b.writeGauge.Inc(1)
+	if b.writeGauge != nil {
+		b.writeGauge.Inc(1)
+	}
 	return b.db.Write(b.b, nil)
 }