FA-26505 / HTTP ranges / Member archive

Missing cached bytes remain unavailable instead of becoming zero bytes · case 05

Missing cached bytes remain unavailable instead of becoming zero bytes.

Member previewVariant 5 · 3 implementations · 6 checks per implementation

Case contract

cells maps integer offsets to one-character strings. Return the requested bytes only if every requested offset exists, else None; empty request returns empty.

Why this case matters

Range responses combine representation identity, conditional requests, framing, and partial-object state.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
cache-holes-not-zero-filled fixture 0	`"a\u0000"`	`null`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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