The following bug has been logged on the website:
Bug reference: 14775
Logged by: Kyle Conroy
Email address: kyle(at)kyleconroy(dot)com
PostgreSQL version: 10beta2
Operating system: macOS
Description:
The Commit message format is incorrectly documented. The `flags` field[0] is
missing. I ran into this while creating a parser for the messages in
Golang.
[0]
https://github.com/postgres/postgres/blob/master/src/backend/replication/logical/proto.c#L80