ITS#7517 Document that dirty DBs may not be closed

diff --git a/libraries/liblmdb/lmdb.h b/libraries/liblmdb/lmdb.h
index 220eea1c6ad41951c2c82e9daf70205d0e6689a9..646d456e31c608c16b10fc095ea4120271de3ad4 100644 (file)
--- a/libraries/liblmdb/lmdb.h
+++ b/libraries/liblmdb/lmdb.h
@@ -827,7 +827,8 @@ int  mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *stat);
         *
         * This call is not mutex protected. Handles should only be closed by
         * a single thread, and only if no other threads are going to reference
-        * the database handle or one of its cursors any further.
+        * the database handle or one of its cursors any further. Do not close
+        * a handle if an existing transaction has modified its database.
         * @param[in] env An environment handle returned by #mdb_env_create()
         * @param[in] dbi A database handle returned by #mdb_dbi_open()
         */