confusing log messages on pg_ctl -w start

Andrew Dunstan wrote:

When I run pg_ctl -w start I often see this on the log, which is less
than clear, if not downright confusing:

....
LOG: database system is ready
FATAL: the database system is starting up

Any ideas on how to improve this?

Yes, that FATAL message certainly looks bad. It seems something is
trying to connect early. Is there anyway to improve this?

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