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Deque transaction charges staged entries rather than allocation cost · case 05

Deque transaction charges staged entries rather than allocation cost.

Member previewVariant 5 · 3 implementations · 7 checks per implementation

Case contract

Publish a complete staged bounded deque only if its captured epoch matches, its occupancy fits and allocation credits suffice. Failure preserves state, epoch and credits; success retires the old snapshot.

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
5	`[[7], 6, 2, "committed", [5, 6]]`	`[[7], 6, 0, "committed", [5, 6]]`	Failed

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