FA-29344 / HTTP retries / Member archive

Replay source snapshot: Body mutation after the first attempt changes replay bytes · case 04

Body mutation after the first attempt changes replay bytes

Member previewVariant 4 · 3 implementations · 7 checks per implementation

Case contract

Events open(list of integer bytes, starting index), mutate(index,byte), read(count), retry, close. Opening freezes bytes and origin. Reads advance within the frozen representation. Retry rewinds to origin. Reads after close return closed; retry after close returns closed. Output read chunks or status markers.

Why this case matters

Offline deterministic model of HTTP request retries.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
3	`["rewound", [99, 5]]`	`["rewound", [4, 5]]`	Failed

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