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-rw-r--r--src/blockchain_utilities/blockchain_blackball.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/blockchain_utilities/blockchain_blackball.cpp b/src/blockchain_utilities/blockchain_blackball.cpp
index 7f80eecef..833a19a0b 100644
--- a/src/blockchain_utilities/blockchain_blackball.cpp
+++ b/src/blockchain_utilities/blockchain_blackball.cpp
@@ -341,7 +341,7 @@ static bool for_all_transactions(const std::string &filename, uint64_t &start_id
if (dbr) throw std::runtime_error("Failed to open rings database file '"
+ actual_filename + "': " + std::string(mdb_strerror(dbr)));
- dbr = mdb_txn_begin(env, NULL, 0, &txn);
+ dbr = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn);
if (dbr) throw std::runtime_error("Failed to create LMDB transaction: " + std::string(mdb_strerror(dbr)));
epee::misc_utils::auto_scope_leave_caller txn_dtor = epee::misc_utils::create_scope_leave_handler([&](){if (tx_active) mdb_txn_abort(txn);});
tx_active = true;