From 8259c573212213e3cd8da7146af525e067c4ddaa Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Sat, 1 Dec 2012 00:41:27 +0100
Subject: [PATCH] Only send reorged txn to mempool after checkpoint

---
 src/main.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index a63aa74a64e..320834e9813 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1704,9 +1704,11 @@ bool SetBestChain(CBlockIndex* pindexNew)
         if (!viewTemp.Flush())
             return error("SetBestBlock() : Cache flush failed after disconnect");
 
-        // Queue memory transactions to resurrect
+        // Queue memory transactions to resurrect.
+        // We only do this for blocks after the last checkpoint (reorganisation before that
+        // point should only happen with -reindex/-loadblock, or a misbehaving peer.
         BOOST_FOREACH(const CTransaction& tx, block.vtx)
-            if (!tx.IsCoinBase())
+            if (!tx.IsCoinBase() && pindex->nHeight > Checkpoints::GetTotalBlocksEstimate())
                 vResurrect.push_back(tx);
     }