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Zip unnest omits a parent with two empty lists · case 02

Zip unnest omits a parent with two empty lists.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

Zip two optional lists within each parent row using longest-list semantics and zero-based ordinals. Missing positions become None; two empty or null lists yield one outer placeholder with ordinal None.

Why this case matters

A bounded deterministic data engine model makes representation and changelog faults reproducible.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
empty both	`[]`	`[[2, null, null, null]]`	Failed

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