FA-45848 / Bounded deques / Member archive

Reservation exceeds the available slot budget · case 03

Reservation exceeds the available slot budget.

Member previewVariant 3 · 3 implementations · 6 checks per implementation

Case contract

Reserve up to requested free positions in a reject-on-full ring. Return [grant,tail,first-span,second-span,free-after]. Head and size are valid, capacity positive.

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
limited free space	`[4, 0, 4, 0, -2]`	`[2, 0, 2, 0, 0]`	Failed

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