PG Bug reporting form <noreply(at)postgresql(dot)org> writes:
> In PostgreSQL 16, pg_basebackup could be run without prompting for a
> password.
> However, when running pg_basebacup on PostgreSQL 17, the user is prompted
> for a password even if .pgpass is set.
Yup, that's a bug. Fix pushed, thanks for the report!
regards, tom lane