FA-46728 / Bounded deques / Member archive

Deque gap insertion shifts only bookmarks at the exact insertion point · case 03

Deque gap insertion shifts only bookmarks at the exact insertion point.

Member previewVariant 3 · 3 implementations · 7 checks per implementation

Case contract

Insert a batch at a deque gap atomically. Left-biased bookmarks at that gap stay before inserted values, right-biased bookmarks move after them, and later gaps shift by inserted length.

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
0	`[[3, 5, 6, 4], [[0, "left"], [1, "left"], [3, "right"], [2, "left"]], true, 3]`	`[[3, 5, 6, 4], [[0, "left"], [1, "left"], [3, "right"], [4, "left"]], true, 3]`	Failed

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

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