FA-46972 / Bounded deques / Member archive

Deque borrow release reverses deferred reclamation order · case 02

Deque borrow release reverses deferred reclamation order.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

Release a unique deque borrow token. Retired storage is reclaimed only when both the owner and all borrowers are gone; unknown releases are idempotent. Return active pins, receipt, retired/reclaimed sets, reclamation epoch and owner state.

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
1	`[[], true, [], [5, 4], 3, false, false]`	`[[], true, [], [4, 5], 3, false, false]`	Failed

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