From 09ddb265d608c185b9564ee59a6150714615c17a Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Sat, 18 Jun 2016 18:16:36 +0200
Subject: [PATCH] Stop trimming when mapTx is empty

---
 src/txmempool.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index 58c66ae45..be8b2c206 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -1144,7 +1144,7 @@ void CTxMemPool::TrimToSize(size_t sizelimit, std::vector<uint256>* pvNoSpendsRe
 
     unsigned nTxnRemoved = 0;
     CFeeRate maxFeeRateRemoved(0);
-    while (DynamicMemoryUsage() > sizelimit) {
+    while (!mapTx.empty() && DynamicMemoryUsage() > sizelimit) {
         indexed_transaction_set::index<descendant_score>::type::iterator it = mapTx.get<descendant_score>().begin();
 
         // We set the new mempool min fee to the feerate of the removed set, plus the