FAILURE MAP
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Decoding: Replacement is emitted before the committed prefix · case 05

Replacement is emitted before the committed prefix.

Member previewVariant 5 · 3 implementations · 7 checks per implementation

Case contract

Return accepted tokens followed by the replacement token.

Why this case matters

A self-contained bookkeeping model makes prefix and token-count semantics observable without a model runtime.

One recorded failure

Sample boundary fixture

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

Boundary fixtureActualExpectedOutcome
partial output[9, 1][1, 9]Failed

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