From 9b5da42745431272120c00dd1a20d75707447e85 Mon Sep 17 00:00:00 2001
From: Simon <simon@bitcartel.com>
Date: Tue, 11 Jul 2017 18:03:10 -0700
Subject: [PATCH] Fixes #2480. Null entry in map was dereferenced leading to a
 segfault.

---
 src/wallet/asyncrpcoperation_sendmany.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/wallet/asyncrpcoperation_sendmany.cpp b/src/wallet/asyncrpcoperation_sendmany.cpp
index ac4490197..901bd9e34 100644
--- a/src/wallet/asyncrpcoperation_sendmany.cpp
+++ b/src/wallet/asyncrpcoperation_sendmany.cpp
@@ -589,6 +589,10 @@ bool AsyncRPCOperation_sendmany::main_impl() {
             {
                 LOCK2(cs_main, pwalletMain->cs_wallet);
                 const CWalletTx& wtx = pwalletMain->mapWallet[jso.hash];
+                // Zero confirmaton notes belong to transactions which have not yet been mined
+                if (mapBlockIndex.find(wtx.hashBlock) == mapBlockIndex.end()) {
+                    throw JSONRPCError(RPC_WALLET_ERROR, strprintf("mapBlockIndex does not contain block hash %s", wtx.hashBlock.ToString()));
+                }
                 wtxHeight = mapBlockIndex[wtx.hashBlock]->nHeight;
                 wtxDepth = wtx.GetDepthInMainChain();
             }