truncate.patch

diff --git a/src/box/alter.cc b/src/box/alter.cc
index e209f16..1326551 100644
--- a/src/box/alter.cc
+++ b/src/box/alter.cc
@@ -1388,7 +1388,7 @@ on_replace_dd_index(struct trigger * /* trigger */, void *event)
 	auto lock_guard = make_scoped_guard([&]{ latch_unlock(&schema_lock); });
 
 	struct txn *txn = (struct txn *) event;
-	txn_check_autocommit(txn, "Space _index");
+	/* txn_check_autocommit(txn, "Space _index"); */
 	struct txn_stmt *stmt = txn_current_stmt(txn);
 	struct tuple *old_tuple = stmt->old_tuple;
 	struct tuple *new_tuple = stmt->new_tuple;
diff --git a/src/box/box.cc b/src/box/box.cc
index a311d6e..12adbf1 100644
--- a/src/box/box.cc
+++ b/src/box/box.cc
@@ -717,6 +717,7 @@ space_truncate(struct space *space)
 	key_buf_end = mp_encode_uint(key_buf, space_id(space));
 	assert(key_buf_end <= key_buf + sizeof(key_buf));
 
+	txn_check_autocommit(txn, "Space _index");
 	/* BOX_INDEX_ID is id of _index space, we need 0 index of that space */
 	struct space *space_index = space_cache_find(BOX_INDEX_ID);
 	Index *index = index_find(space_index, 0);
@@ -740,6 +741,7 @@ space_truncate(struct space *space)
 	}
 	assert(index_count <= BOX_INDEX_MAX);
 
+	box_txn_begin();
 	/* drop all selected indexes */
 	for (int i = index_count - 1; i >= 0; --i) {
 		uint32_t index_id = tuple_field_u32(indexes[i], 1);
@@ -747,8 +749,10 @@ space_truncate(struct space *space)
 		key_buf_end = mp_encode_uint(key_buf_end, space_id(space));
 		key_buf_end = mp_encode_uint(key_buf_end, index_id);
 		assert(key_buf_end <= key_buf + sizeof(key_buf));
-		if (box_delete(BOX_INDEX_ID, 0, key_buf, key_buf_end, NULL))
+		if (box_delete(BOX_INDEX_ID, 0, key_buf, key_buf_end, NULL)) {
+			box_txn_rollback();
 			diag_raise();
+		}
 	}
 
 	/* create all indexes again, now they are empty */
@@ -756,9 +760,11 @@ space_truncate(struct space *space)
 		tuple = indexes[i];
 		if (box_insert(BOX_INDEX_ID, tuple->data,
 			       tuple->data + tuple->bsize, NULL)) {
+			box_txn_rollback();
 			diag_raise();
 		}
 	}
+	box_txn_commit();
 }
 
 int