The invalidation callback looked the path up again after the
subscription event arrived. A transient lookup failure, or a stale
cached result, left the open handle pinned to its old entry with no
retry: the cursor had already advanced, so only another event for the
same path would recover it. Apply the entry the event itself carries:
NewEntry for in-place updates and rename destinations, and keep the
last entry when the path is vacated so unlinked-but-open reads still
work.
Chris Lu
fbda7d9601