FA-12844 / Numerical aggregation / Member archive
Signed channel totals: Positive and negative channels are collapsed before reporting. · case 04
The reduction disagrees with its explicit aggregation oracle.
Case contract
Return [positive total, negative total, zero count] for an integer sequence; preserve signs and multiplicity.
Why this case matters
Exact bounded examples isolate a reduction defect without floating-point or external-service effects.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| regression 1 | [0, 0, 2] | [6, -6, 2] | Failed |
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