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Linearized growth retains the displaced read cursor · case 05

Linearized growth retains the displaced read cursor.

Member previewVariant 5 · 3 implementations · 6 checks per implementation

Case contract

Grow a ring to larger positive capacity. Linearize occupied slots in logical order, clear unused storage, reset head and report next insertion index and unchanged logical count.

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
wrapped live data	`[[6, 7, 5, null, null, null, null], 3, 3, 3]`	`[[6, 7, 5, null, null, null, null], 0, 3, 3]`	Failed

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