From 43cc880a9b28e3ebfd4af687cc100e9947c8708c Mon Sep 17 00:00:00 2001
From: Matt Corallo <git@bluematt.me>
Date: Sat, 15 Jul 2017 20:03:11 -0400
Subject: [PATCH] Fix segfault when shutting down before fully loading

This was introduced by 3192975f1d177aa9f0bbd823c6387cfbfa943610.
It can be triggered easily when canceling DB upgrade from
pre-per-utxo.
---
 src/init.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/init.cpp b/src/init.cpp
index d00ba56ede4be..d32d7e6b4778c 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -263,7 +263,9 @@ void PrepareShutdown()
     }
 
     // FlushStateToDisk generates a SetBestChain callback, which we should avoid missing
-    FlushStateToDisk();
+    if (pcoinsTip != nullptr) {
+        FlushStateToDisk();
+    }
 
     // After there are no more peers/RPC left to give us new data which may generate
     // CValidationInterface callbacks, flush them...