FYI fairywren failed in this test: https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=fairywren&dt=2023-12-16%2022%3A03%3A06
===8<=== Restoring database schemas in the new cluster *failure* Consult the last few lines of "C:/tools/nmsys64/home/pgrunner/bf/root/HEAD/pgsql.build/testrun/pg_upgrade/003_logical_slots/data/t_003_logical_slots_newpub_data/pgdata/pg_upgrade_output.d/20231216T221418.035/log/pg_upgrade_dump_1.log" for the probable cause of the failure. Failure, exiting [22:14:34.598](22.801s) not ok 10 - run of pg_upgrade of old cluster [22:14:34.600](0.001s) # Failed test 'run of pg_upgrade of old cluster' # at C:/tools/nmsys64/home/pgrunner/bf/root/HEAD/pgsql/src/bin/pg_upgrade/t/003_logical_slots.pl line 177. ===8<=== Without that log it might be hard to figure out what went wrong though :-/