FA-10296 / Observability / Open access

Structured log emission policy: Suppressed log records are exported · case 01

Suppressed log records are exported.

Verified by executionVariant 1 · 8 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The implementation substitutes and True and for and not suppressed and, so suppressed log records are exported.

THE FAILURE

The implementation substitutes and True and for and not suppressed and, so suppressed log records are exported.

Unsuccessful approach: The attempted repair substitutes and suppressed and. Fixture 1 still yields False instead of True.

Case contract

Emit a log only when severity reaches the threshold, logger is enabled, sampling selected it, it is not suppressed, and all required fields exist. False-valued fields count as present.

Why this case matters

An offline model of structured log emission policy, suitable for testing build and release tooling without external services.

1 / The failure

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(event, threshold, enabled, sampled, suppressed, required):
    return event['level'] >= threshold and enabled and sampled and True and set(required) <= set(event)
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('fixture 1', solve({'level': 2, 'message': 'x'}, 2, True, True, False, ['message']), True)
check('fixture 2', solve({'level': 1, 'message': 'x'}, 2, True, True, False, ['message']), False)
check('fixture 3', solve({'level': 3, 'message': 'x'}, 2, True, True, False, ['message']), True)
check('fixture 4', solve({'level': 2, 'message': 'x'}, 2, False, True, False, ['message']), False)
check('fixture 5', solve({'level': 2, 'message': 'x'}, 2, True, False, False, ['message']), False)
check('fixture 6', solve({'level': 2, 'message': 'x'}, 2, True, True, True, ['message']), False)
check('fixture 7', solve({'level': 2}, 2, True, True, False, ['message']), False)
check('fixture 8', solve({'level': 2, 'message': False}, 2, True, True, False, ['message']), True)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
fixture 1	`True`	`True`	Passed
fixture 2	`False`	`False`	Passed
fixture 3	`True`	`True`	Passed
fixture 4	`False`	`False`	Passed
fixture 5	`False`	`False`	Passed
fixture 6	`True`	`False`	Failed
fixture 7	`False`	`False`	Passed
fixture 8	`True`	`True`	Passed

SHA-256 / 23f9c1fdbd9d715a910a331825c12c970d83efb61ffff9ad7359b761c6085291

2 / The unsuccessful fix

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(event, threshold, enabled, sampled, suppressed, required):
    return event['level'] >= threshold and enabled and sampled and suppressed and set(required) <= set(event)
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('fixture 1', solve({'level': 2, 'message': 'x'}, 2, True, True, False, ['message']), True)
check('fixture 2', solve({'level': 1, 'message': 'x'}, 2, True, True, False, ['message']), False)
check('fixture 3', solve({'level': 3, 'message': 'x'}, 2, True, True, False, ['message']), True)
check('fixture 4', solve({'level': 2, 'message': 'x'}, 2, False, True, False, ['message']), False)
check('fixture 5', solve({'level': 2, 'message': 'x'}, 2, True, False, False, ['message']), False)
check('fixture 6', solve({'level': 2, 'message': 'x'}, 2, True, True, True, ['message']), False)
check('fixture 7', solve({'level': 2}, 2, True, True, False, ['message']), False)
check('fixture 8', solve({'level': 2, 'message': False}, 2, True, True, False, ['message']), True)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
fixture 1	`False`	`True`	Failed
fixture 2	`False`	`False`	Passed
fixture 3	`False`	`True`	Failed
fixture 4	`False`	`False`	Passed
fixture 5	`False`	`False`	Passed
fixture 6	`True`	`False`	Failed
fixture 7	`False`	`False`	Passed
fixture 8	`False`	`True`	Failed

SHA-256 / fcb1072d1e8185abaa28807b08fc65de033596c84188caa0faf63a92f71b5ece

HELD IN THE MEMBER ARCHIVE

The verified repair and its recorded checks are member-only.

This mechanism has 8 recorded checks per implementation. The open-access tier publishes the failure and the unsuccessful fix; the repaired source that passes every check, and the observations that prove it, are available to members.

Every case sharing this mechanism uses the same contract and the same repair, so this one record is held back for all of them.

Member access is invitation-based. Sign in with your invited account to inspect the repair.

Verification & scope

This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:38:37.812098+00:00.

Case digest / 97c05401dbcce240d83143e074858c30fe880f4159024271fb174be123b578cd