From 1d23db220ad584b3af1cc243cd3a1193bb1deeed Mon Sep 17 00:00:00 2001
From: moneromooo-monero <moneromooo-monero@users.noreply.github.com>
Date: Sun, 7 Dec 2014 11:36:44 +0000
Subject: db_lmdb: do not keep a dangling pointer to stack objects

---
 src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp b/src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp
index 632c2cc60..278bec14f 100644
--- a/src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp
+++ b/src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp
@@ -1804,12 +1804,14 @@ uint64_t BlockchainLMDB::add_block( const block& blk
   try
   {
     BlockchainDB::add_block(blk, block_size, cumulative_difficulty, coins_generated, txs);
+    m_write_txn = NULL;
 
     txn.commit();
   }
   catch (...)
   {
     m_num_outputs = num_outputs;
+    m_write_txn = NULL;
     throw;
   }
 
@@ -1830,12 +1832,14 @@ void BlockchainLMDB::pop_block(block& blk, std::vector<transaction>& txs)
   try
   {
     BlockchainDB::pop_block(blk, txs);
+    m_write_txn = NULL;
 
     txn.commit();
   }
   catch (...)
   {
     m_num_outputs = num_outputs;
+    m_write_txn = NULL;
     throw;
   }
 
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