FA-17834 / Time representation / Member archive

Smear endpoint omits or reverses completed leap removal · case 04

The decoded time state disagrees with the explicit regression oracle for end_coordinate.

Member previewVariant 4 · 3 implementations · 11 checks per implementation

Case contract

Stipulated smear removes signed leap L linearly over atomic [start,end], with positive width>|L| and clamped progress outside. Return exact rational smeared coordinate, effective slope (inside start-inclusive/end-exclusive window), signed removed correction, smeared endpoint coordinates and remaining signed correction. Fraction outputs use canonical strings.

Why this case matters

Clock transfer and timestamp consumers require preserved coordinate, phase, validity and elapsed-time semantics.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fixture 1	`["10", "9/10", "0", [10, 20], "1"]`	`["10", "9/10", "0", [10, 19], "1"]`	Failed

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

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