From ceaefdd5f362537a1908d0095059e4be788f3dee Mon Sep 17 00:00:00 2001
From: Cory Fields <cory-nospam-@coryfields.com>
Date: Tue, 13 Feb 2018 00:24:14 -0500
Subject: fix possible shutdown assertion with -reindex-shutdown

Credit @eklitzke for reproducing.
---
 src/validation.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/validation.cpp b/src/validation.cpp
index 371460a6f0..dabf7e279e 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -2087,7 +2087,7 @@ bool static FlushStateToDisk(const CChainParams& chainparams, CValidationState &
             nLastWrite = nNow;
         }
         // Flush best chain related state. This can only be done if the blocks / block index write was also done.
-        if (fDoFullFlush) {
+        if (fDoFullFlush && !pcoinsTip->GetBestBlock().IsNull()) {
             // Typical Coin structures on disk are around 48 bytes in size.
             // Pushing a new one to the database can cause it to be written
             // twice (once in the log, and once in the tables). This is already
-- 
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