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Download checkpoints advance only after durable writes · case 03
Download checkpoints advance only after durable writes.
Case contract
Return durable checkpoint: synced writes advance to written; unsynced writes retain prior checkpoint. written>=checkpoint.
Why this case matters
Range responses combine representation identity, conditional requests, framing, and partial-object state.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| resume-checkpoint-after-fsync fixture 0 | 6 | 3 | Failed |
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