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Dictionary equality reports false when either lane is null · case 04

Dictionary equality reports false when either lane is null.

Member previewVariant 4 · 3 implementations · 7 checks per implementation

Case contract

Compare two dictionary vectors row by row using decoded values, not local codes. Null validity yields UNKNOWN(None), including two null lanes. Dictionary entries themselves are ordinary integer values. Output follows the supplied pair selection order.

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
unknown left	`[false]`	`[null]`	Failed

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