From f045635ebc4987e553fcf55fd27cf0a8f4686213 Mon Sep 17 00:00:00 2001
From: jl777 <jameslee777@yahoo.com>
Date: Tue, 24 Apr 2018 15:35:48 +0300
Subject: [PATCH] Fix

---
 src/txmempool.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index 9dcfab346..26926ae16 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -401,15 +401,19 @@ void CTxMemPool::removeConflicts(const CTransaction &tx, std::list<CTransaction>
     }
 }
 
+int32_t komodo_validate_interest(const CTransaction &tx,int32_t txheight,uint32_t nTime,int32_t dispflag);
+
 void CTxMemPool::removeExpired(unsigned int nBlockHeight)
 {
+    CBlockIndex *tipindex;
     // Remove expired txs from the mempool
     LOCK(cs);
     list<CTransaction> transactionsToRemove;
     for (indexed_transaction_set::const_iterator it = mapTx.begin(); it != mapTx.end(); it++)
     {
         const CTransaction& tx = it->GetTx();
-        if (IsExpiredTx(tx, nBlockHeight) || komodo_validate_interest(tx,chainActive.Tip()->nHeight+1,chainActive.Tip()->GetMedianTimePast() + 777,0) < 0)
+        tipindex = chainActive.Tip();
+        if (IsExpiredTx(tx, nBlockHeight) || (tipindex != 0 && komodo_validate_interest(tx,tipindex->nHeight+1,tipindex->GetMedianTimePast() + 777,1) < 0)
         {
             transactionsToRemove.push_back(tx);
         }