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Pcm payload valid prefix: negative declaration · case 05

Negative valid counts trigger Python negative slicing.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

Decode a stipulated fixed-capacity PCM slot whose declared valid prefix is clamped to physical storage; verify zero padding only inside the slot.

Why this case matters

Offline PCM interchange uses these exact bounded packet and sample representation decisions.

One recorded failure

Sample boundary fixture

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

Boundary fixtureActualExpectedOutcome
oracle 2[[[], 0, true], [[3], -1, false]][[[], 0, true], [[], 0, false]]Failed

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

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