FA-18334 / Time representation / Member archive

Offset-step direction loses negative or zero distinction · case 04

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

Member previewVariant 4 · 3 implementations · 12 checks per implementation

Case contract

A stipulated offset table has initial atomic-minus-civil offset and a single step effective at atomic transition T. Translate atomic to civil label using active offset, retaining a fold tag for repeated labels on positive steps. Report label, offset, previous-label delta, discontinuity direction, repeated-label window membership and invertible pair. Offsets need not correspond to any real-world table.

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 5	`[91, 9, 2, false, true, 0, 100, [91, 0]]`	`[91, 9, 2, false, true, -1, 100, [91, 0]]`	Failed

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

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