XLogReadRecord() error in XlogReadTwoPhaseData() - Mailing list pgsql-hackers

On Sun, Oct 24, 2021 at 04:35:02PM -0700, Noah Misch wrote:
> https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=kittiwake&dt=2021-10-24%2012%3A01%3A10
> got an interesting v9.6 failure [...]:
> 
> 2021-10-24 14:25:29.263 CEST [34569:175] pgbench ERROR:  could not read two-phase state from xlog at 0/158F4E0
> 2021-10-24 14:25:29.263 CEST [34569:176] pgbench STATEMENT:  COMMIT PREPARED 'c1';

As a first step, let's report the actual XLogReadRecord() error message.
Attached.  All the other sites that expect no error already do this.