Re: pgsql: Don't trust unvalidated xl_tot_len.

Re: To Thomas Munro
> > src/test/recovery/t/039_end_of_wal.pl   | 460 ++++++++++++++++++++++++++++++++
> 
> I haven't investigated the details yet, and it's not affecting the
> builds on apt.postgresql.org, but the Debian amd64 and i386 regression
> tests just failed this test on PG13 (11 and 15 are ok):

12 and 14 are also failing, now on Debian unstable. (Again, only in
the salsa.debian.org tests, not on apt.postgresql.org's buildds.)

12 amd64: https://salsa.debian.org/postgresql/postgresql/-/jobs/4898857
12 i386:  https://salsa.debian.org/postgresql/postgresql/-/jobs/4898858

The tests there are running in Docker containers.

Christoph