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Commit <FIXME> fixed the bug that RemoveTempRelationsCallback() did not push/register a snapshot. That only went unnoticed because often a valid catalog snapshot exists and is returned by GetOldestSnapshot(). But due to invalidation processing that is not reliable. Thus assert in init_toast_snapshot() that there is a registered or active snapshot, using the new HaveRegisteredOrActiveSnapshot(). Author: Andres Freund Discussion: https://postgr.es/m/20220219180002.6tubjq7iw7m52bgd@alap3.anarazel.de