From 4c2a45288a6bc89ce2e48c2854943904dcd01bab Mon Sep 17 00:00:00 2001 From: moneromooo-monero Date: Fri, 12 Dec 2014 23:20:41 +0000 Subject: [PATCH] db_lmdb: catch attempt to remove block from an empty blockchain It would probably have thrown when not finding a block at height 2^64-1, but better make things clear. --- src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp b/src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp index f53e5bac..a4dbb1d8 100644 --- a/src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp +++ b/src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp @@ -207,6 +207,9 @@ void BlockchainLMDB::remove_block() LOG_PRINT_L3("BlockchainLMDB::" << __func__); check_open(); + if (m_height == 0) + throw0(BLOCK_DNE ("Attempting to remove block from an empty blockchain")); + MDB_val_copy k(m_height - 1); MDB_val h; if (mdb_get(*m_write_txn, m_block_hashes, &k, &h))