FA-12909 / Numerical aggregation / Member archive
Clipped contribution sum: The lower clipping branch is omitted. · case 04
The reduction disagrees with its explicit aggregation oracle.
Case contract
For lo<=hi, clip each integer contribution into [lo,hi], then sum. Empty is zero.
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 | -2 | 7 | Failed |
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