FA-46200 / Bounded deques / Member archive

Aborted consumer claim is restored behind newer entries · case 05

Aborted consumer claim is restored behind newer entries.

Member previewVariant 5 · 3 implementations · 6 checks per implementation

Case contract

Claim a valid prefix of a bounded deque, then commit all, abort all, or commit its first item. Unconsumed claimed items rejoin ahead of unclaimed items before new entries fill remaining capacity.

Why this case matters

Controlled bounded deque implementation model with explicit storage and lifecycle observations.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
abort restores head	`[[7, 5, 6, 8, 9], [5, 6], [10]]`	`[[5, 6, 7, 8, 9], [5, 6], [10]]`	Failed

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