From b039e29c174306b292dc6f9313c8ef3d107aa70f Mon Sep 17 00:00:00 2001
From: jc <jc@jc>
Date: Mon, 25 Jun 2018 09:55:49 -0400
Subject: [PATCH] Don't write a null anchor to chainstate

---
 src/txdb.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/txdb.cpp b/src/txdb.cpp
index ef620e951..5bdb9ed8b 100644
--- a/src/txdb.cpp
+++ b/src/txdb.cpp
@@ -192,7 +192,8 @@ bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins,
     // In the last batch, mark the database as consistent with hashBlock again.
     batch.Erase(DB_HEAD_BLOCKS);
     batch.Write(DB_BEST_BLOCK, hashBlock);
-    batch.Write(DB_BEST_ANCHOR, hashAnchor);
+    if(!hashAnchor.IsNull())
+        batch.Write(DB_BEST_ANCHOR, hashAnchor);
 
     LogPrint(BCLog::COINDB, "Writing final batch of %.2f MiB\n", batch.SizeEstimate() * (1.0 / 1048576.0));
     bool ret = db.WriteBatch(batch);