FA-46500 / Bounded deques / Member archive

Rejected borrowed-block release still clears payload references · case 05

Rejected borrowed-block release still clears payload references.

Member previewVariant 5 · 3 implementations · 6 checks per implementation

Case contract

A deque block with outstanding borrowers cannot be freed. Otherwise clear its live references, append to a bounded free-block cache and dispose the oldest surplus block identities.

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	`[[1], false, [], []]`	`[[1], false, [5], []]`	Failed

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

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