Try to recover from closing a freed cursor

kriszyp · Jan 21, 2025 · e764d2c · e764d2c
1 parent 447c167
commit e764d2c
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/dependencies/lmdb/libraries/liblmdb/mdb.c b/dependencies/lmdb/libraries/liblmdb/mdb.c
@@ -10357,6 +10357,11 @@ void
 mdb_cursor_close(MDB_cursor *mc)
 {
 	if (mc) {
+		if (!mc->mc_txn || !mc->mc_txn->mt_env) {
+	        fprintf(stderr, "cursor_close: mc->mc_txn or mc->mc_txn->mt_env is NULL, ensure that cursors are closed before the transaction is closed\n");
+			free(mc);
+			return;
+        }
 		MDB_CURSOR_UNREF(mc, 0);
 	}
 	if (mc && !mc->mc_backup) {