From 7b1acda395879f4ff4b430647b98328f785ba2e4 Mon Sep 17 00:00:00 2001
From: "Wladimir J. van der Laan" <laanwj@gmail.com>
Date: Tue, 26 Apr 2016 14:34:40 +0200
Subject: [PATCH] chain: Add assertion in case of missing records in index db

---
 src/chain.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/chain.cpp b/src/chain.cpp
index 5b8ce076c..39520cc8f 100644
--- a/src/chain.cpp
+++ b/src/chain.cpp
@@ -90,6 +90,7 @@ CBlockIndex* CBlockIndex::GetAncestor(int height)
             pindexWalk = pindexWalk->pskip;
             heightWalk = heightSkip;
         } else {
+            assert(pindexWalk->pprev);
             pindexWalk = pindexWalk->pprev;
             heightWalk--;
         }