Re: cleanup patches for incremental backup

I'm seeing some recent buildfarm failures for pg_walsummary:

    https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=sungazer&dt=2024-01-14%2006%3A21%3A58
    https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=idiacanthus&dt=2024-01-17%2021%3A10%3A36
    https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=serinus&dt=2024-01-20%2018%3A58%3A49
    https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=taipan&dt=2024-01-23%2002%3A46%3A57
    https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=serinus&dt=2024-01-23%2020%3A23%3A36

The signature looks nearly identical in each:

    #   Failed test 'WAL summary file exists'
    #   at t/002_blocks.pl line 79.

    #   Failed test 'stdout shows block 0 modified'
    #   at t/002_blocks.pl line 85.
    #                   ''
    #     doesn't match '(?^m:FORK main: block 0$)'

I haven't been able to reproduce the issue on my machine, and I haven't
figured out precisely what is happening yet, but I wanted to make sure
there is awareness.

-- 
Nathan Bossart
Amazon Web Services: https://aws.amazon.com