Hi Hannu,
Glad it was useful.
> Hmm, this is what I get on PostgreSQL 16.4
> [...] 0/17F5830
On master pg_lsn now zero-pads the low word -- commit 2633dae2e48
("Standardize LSN formatting by zero padding", Jul 2025) made
pg_lsn_out use %X/%08X. 16.4, 17 and 18 still use %X, so L matches
pg_lsn there; on master it does not, since the patch formats L with
%X. If L is meant to mirror pg_lsn, %08X would track the new format.
Happy to re-test once you post the next version.
Regards,
Manu