Re: pg_waldump: support decoding of WAL inside tarfile

On Fri, Mar 20, 2026 at 11:49:02PM -0400, Tom Lane wrote:
> Andrew Dunstan <andrew@dunslane.net> writes:
> > Thanks, committed with very minor tweaks.
>
> Buildfarm members batta and hachi don't like this very much.
> They fail the pg_verifybackup tests like so:
>
> # Running: pg_verifybackup --exit-on-error
/home/admin/batta/buildroot/HEAD/pgsql.build/src/bin/pg_verifybackup/tmp_check/t_008_untar_primary_data/backup/server-backup
> pg_waldump: error: could not find WAL in archive "base.tar.zst"
> pg_verifybackup: error: WAL parsing failed for timeline 1

I did not look at what's happening on the host, but it seems like a
safe bet to assume that we are not seeing many failures in the
buildfarm because we don't have many animals that have the idea to add
--with-zstd to their build configuration, like these two ones.
--
Michael