A directory rebuild wiped the cached children, listed the filer once, and
published the directory authoritatively cached over whatever came back. A
transient empty listing -- a momentary list-stream glitch that ends as a
clean EOF with no entries -- then stranded a populated directory cached
over an empty store, hiding every file in it until some unrelated event
happened to rebuild it: stat returns ENOENT and readdir returns nothing
though the files are safe on the filer, and nothing re-triggers a build.
Re-read the directory when the listing comes back empty before trusting
it. The first re-read is immediate, since the likely transient clears on a
fresh stream; later attempts space out. A genuinely empty directory still
lists empty every time and caches as before, so only empty listings pay
the extra read.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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