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9abdc1841e
The validate_sync_standby_slots subroutine requires an LWLock, so it cannot run in processes without PGPROC; skip it there to avoid a crash. This replaces the current test for ReplicationSlotCtl being not null, which appears to be a solution for the same problem but less general. I also rewrote a related comment that mentioned ReplicationSlotCtl in StandbySlotsHaveCaughtup. This code came in with commit bf279ddd1c28; backpatch to 17. Reported-by: Gabriele Bartolini <gabriele.bartolini@enterprisedb.com> Reviewed-by: Amit Kapila <amit.kapila16@gmail.com> Reviewed-by: Zhijie Hou <houzj.fnst@fujitsu.com> Discussion: https://postgr.es/m/202411281216.sutbxtr6idnn@alvherre.pgsql