Three crash bugs in convert_fp8_to_int4.py, all on the download path:
P3: 'import fcntl' at line 211 is Unix-only — ModuleNotFoundError on Windows.
The --indir test path returns before reaching it so tests pass, but
'--repo' on Windows hard-crashes. Guarded the import: try fcntl (Unix),
fall back to msvcrt.locking (Windows), skip if neither available.
P4: repo_info retry loop had range(999) — up to ~16 hours of retries on a
bad network, then fell through to line 395 where 'info' was unbound
(NameError). Capped at 10 retries and added an explicit error + return
when exhausted. Also added an early return if no safetensors shards are
found in the repo.
P5: if the shards list was empty (wrong repo, all filtered out), the
'for i, sh in enumerate(shards)' loop never executed and 'i' was unbound
at line 460 (NameError). Now caught by the early return from P4.
Co-authored-by: woolcoxm <13604288+woolcoxm@users.noreply.github.com>
woolcoxm