Problem: A failed initial directory listing discards the listing state:
the user is left in an empty modifiable non-listing buffer, and
the BufEnter autocmd retries the failing open, repeating the
error on every re-entry.
Solution: Render the failure as an empty listing with state and handlers
intact: the error is reported once and "R" or :edit retries the
listing. Keep the error on the listing state so a failed
listing is distinguishable from an empty one; the next list
clears it.
d80121327f
