Dear Hou, Thanks for updating the patch. I ran tests and reproducer [1] for all versions. Confirmed the issue happened before the patch and fixed after applying them.
One difference between master and others is that pg_sync_replication_slots() on HEAD is not returned. Because the behavior was changed by 0d2d4a0, not related with the fix. I feel these patches are enough good shape. [1]: https://www.postgresql.org/message-id/TY7PR01MB14554DBE84290130EB421DD28F596A%40TY7PR01MB14554.jpnprd01.prod.outlook.com Best regards, Hayato Kuroda FUJITSU LIMITED
