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FA-25871 / Filter interfaces / Open access

Moving a linked lower bound translates the upper bound by the same delta · case 01

Moving a linked lower bound translates the upper bound by the same delta is violated by the widget projection.

Verified by executionVariant 1 · 10 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The linked-upper decision uses `d['new'] if d['linked'] else d['hi']` instead of the stipulated coupled-range-edit projection.

THE FAILURE

The linked-upper decision uses `d['new'] if d['linked'] else d['hi']` instead of the stipulated coupled-range-edit projection.

Unsuccessful approach: The attempted correction `d['hi']` still violates the explicit contract fixtures.

Case contract

Editing one numeric endpoint clamps only when the range lock is enabled; linked-width edits translate the opposite endpoint, and unbounded sides remain unbounded. This example checks: Moving a linked lower bound translates the upper bound by the same delta.

Why this case matters

Filter-widget state and serialization must preserve user constraints while the view changes.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(d):
    return {'lower-clamp':(min(d['new'],d['hi']) if d['lock'] and d['hi'] is not None else d['new']), 'upper-clamp':(max(d['new'],d['lo']) if d['lock'] and d['lo'] is not None else d['new']), 'linked-upper':(d['new'] if d['linked'] else d['hi']), 'linked-lower':(d['lo']+d['new']-d['hi'] if d['linked'] and d['hi'] is not None and d['lo'] is not None else d['lo']), 'link-enabled':(d['lo'] is not None and d['hi'] is not None), 'reversal-warning':(d['lo'] is not None and d['hi'] is not None and d['lo']>d['hi'])}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'lo': None, 'hi': None, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': None, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 3, 'linked-lower': -1, 'link-enabled': True, 'reversal-warning': False}), ({'lo': None, 'hi': None, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': None, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': None, 'hi': 2, 'new': 1, 'lock': False, 'linked': False}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 2, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': None, 'hi': 5, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': 5, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': None, 'hi': 5, 'new': 7, 'lock': True, 'linked': False}, {'lower-clamp': 5, 'upper-clamp': 7, 'linked-upper': 5, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': None, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': None, 'linked-lower': 0, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': 1, 'lock': False, 'linked': False}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 2, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': 4, 'linked-lower': -6, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': 7, 'lock': True, 'linked': False}, {'lower-clamp': 5, 'upper-clamp': 7, 'linked-upper': 5, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False})], 2: [({'lo': None, 'hi': None, 'new': -1, 'lock': True, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': None, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': 4, 'linked-lower': -6, 'link-enabled': True, 'reversal-warning': False}), ({'lo': None, 'hi': 2, 'new': -1, 'lock': True, 'linked': False}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': 2, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': None, 'hi': 2, 'new': 7, 'lock': True, 'linked': True}, {'lower-clamp': 2, 'upper-clamp': 7, 'linked-upper': 2, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': None, 'hi': 5, 'new': 7, 'lock': False, 'linked': False}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': 5, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': None, 'new': 1, 'lock': False, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': None, 'linked-lower': 0, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': -1, 'lock': True, 'linked': False}, {'lower-clamp': -1, 'upper-clamp': 0, 'linked-upper': 2, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': 7, 'lock': True, 'linked': True}, {'lower-clamp': 2, 'upper-clamp': 7, 'linked-upper': 9, 'linked-lower': 5, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': 7, 'lock': False, 'linked': False}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': 5, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 5, 'hi': None, 'new': 1, 'lock': False, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': None, 'linked-lower': 5, 'link-enabled': False, 'reversal-warning': False})], 3: [({'lo': None, 'hi': None, 'new': 1, 'lock': False, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': None, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 6, 'linked-lower': -4, 'link-enabled': True, 'reversal-warning': False}), ({'lo': None, 'hi': 2, 'new': 7, 'lock': False, 'linked': True}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': 2, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': None, 'hi': 5, 'new': 1, 'lock': True, 'linked': False}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 5, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': None, 'new': -1, 'lock': True, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': 0, 'linked-upper': None, 'linked-lower': 0, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': -1, 'lock': False, 'linked': False}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': 2, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': 7, 'lock': False, 'linked': True}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': 9, 'linked-lower': 5, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': 1, 'lock': True, 'linked': False}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 5, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 5, 'hi': None, 'new': -1, 'lock': True, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': 5, 'linked-upper': None, 'linked-lower': 5, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 5, 'hi': 2, 'new': -1, 'lock': False, 'linked': False}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': 2, 'linked-lower': 5, 'link-enabled': True, 'reversal-warning': True})], 4: [({'lo': None, 'hi': None, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': None, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 5, 'hi': 2, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': -4, 'linked-lower': 2, 'link-enabled': True, 'reversal-warning': True}), ({'lo': None, 'hi': 5, 'new': 1, 'lock': False, 'linked': False}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 5, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': None, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': None, 'linked-lower': 0, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': None, 'new': 7, 'lock': True, 'linked': False}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': None, 'linked-lower': 0, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 3, 'linked-lower': -1, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': 1, 'lock': False, 'linked': False}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 5, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 5, 'hi': None, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': None, 'linked-lower': 5, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 5, 'hi': None, 'new': 7, 'lock': True, 'linked': False}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': None, 'linked-lower': 5, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 5, 'hi': 2, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 5, 'linked-upper': -2, 'linked-lower': 4, 'link-enabled': True, 'reversal-warning': True})], 5: [({'lo': None, 'hi': None, 'new': 7, 'lock': False, 'linked': True}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': None, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 5, 'hi': 2, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 5, 'linked-upper': -2, 'linked-lower': 4, 'link-enabled': True, 'reversal-warning': True}), ({'lo': None, 'hi': 5, 'new': 7, 'lock': True, 'linked': True}, {'lower-clamp': 5, 'upper-clamp': 7, 'linked-upper': 5, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': None, 'new': 7, 'lock': False, 'linked': False}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': None, 'linked-lower': 0, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': 1, 'lock': False, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 3, 'linked-lower': -1, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': -1, 'lock': True, 'linked': False}, {'lower-clamp': -1, 'upper-clamp': 0, 'linked-upper': 5, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': 7, 'lock': True, 'linked': True}, {'lower-clamp': 5, 'upper-clamp': 7, 'linked-upper': 12, 'linked-lower': 2, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 5, 'hi': None, 'new': 7, 'lock': False, 'linked': False}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': None, 'linked-lower': 5, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 5, 'hi': 2, 'new': 1, 'lock': False, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': -2, 'linked-lower': 4, 'link-enabled': True, 'reversal-warning': True}), ({'lo': 5, 'hi': 5, 'new': -1, 'lock': True, 'linked': False}, {'lower-clamp': -1, 'upper-clamp': 5, 'linked-upper': 5, 'linked-lower': 5, 'link-enabled': True, 'reversal-warning': False})]}
for index, (data, expected) in enumerate(fixtures[N]):
    check("contract fixture " + str(index), solve(data), expected)
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 fixtureActualExpectedOutcome
contract fixture 0{'link-enabled': False, 'linked-lower': None, 'linked-upper': -1, 'lower-clamp': -1, 'reversal-warning': False, 'upper-clamp': -1}{'link-enabled': False, 'linked-lower': None, 'linked-upper': None, 'lower-clamp': -1, 'reversal-warning': False, 'upper-clamp': -1}Failed
contract fixture 1{'link-enabled': True, 'linked-lower': -1, 'linked-upper': 1, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}{'link-enabled': True, 'linked-lower': -1, 'linked-upper': 3, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}Failed
contract fixture 2{'link-enabled': False, 'linked-lower': None, 'linked-upper': 1, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}{'link-enabled': False, 'linked-lower': None, 'linked-upper': None, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}Failed
contract fixture 3{'link-enabled': False, 'linked-lower': None, 'linked-upper': 2, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}{'link-enabled': False, 'linked-lower': None, 'linked-upper': 2, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}Passed
contract fixture 4{'link-enabled': False, 'linked-lower': None, 'linked-upper': -1, 'lower-clamp': -1, 'reversal-warning': False, 'upper-clamp': -1}{'link-enabled': False, 'linked-lower': None, 'linked-upper': 5, 'lower-clamp': -1, 'reversal-warning': False, 'upper-clamp': -1}Failed
contract fixture 5{'link-enabled': False, 'linked-lower': None, 'linked-upper': 5, 'lower-clamp': 5, 'reversal-warning': False, 'upper-clamp': 7}{'link-enabled': False, 'linked-lower': None, 'linked-upper': 5, 'lower-clamp': 5, 'reversal-warning': False, 'upper-clamp': 7}Passed
contract fixture 6{'link-enabled': False, 'linked-lower': 0, 'linked-upper': 1, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}{'link-enabled': False, 'linked-lower': 0, 'linked-upper': None, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}Failed
contract fixture 7{'link-enabled': True, 'linked-lower': 0, 'linked-upper': 2, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}{'link-enabled': True, 'linked-lower': 0, 'linked-upper': 2, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}Passed
contract fixture 8{'link-enabled': True, 'linked-lower': -6, 'linked-upper': -1, 'lower-clamp': -1, 'reversal-warning': False, 'upper-clamp': -1}{'link-enabled': True, 'linked-lower': -6, 'linked-upper': 4, 'lower-clamp': -1, 'reversal-warning': False, 'upper-clamp': -1}Failed
contract fixture 9{'link-enabled': True, 'linked-lower': 0, 'linked-upper': 5, 'lower-clamp': 5, 'reversal-warning': False, 'upper-clamp': 7}{'link-enabled': True, 'linked-lower': 0, 'linked-upper': 5, 'lower-clamp': 5, 'reversal-warning': False, 'upper-clamp': 7}Passed

SHA-256 / 885912f24b666265733c38aa69a866a48e1df693862688de3532031120e7a014

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(d):
    return {'lower-clamp':(min(d['new'],d['hi']) if d['lock'] and d['hi'] is not None else d['new']), 'upper-clamp':(max(d['new'],d['lo']) if d['lock'] and d['lo'] is not None else d['new']), 'linked-upper':(d['hi']), 'linked-lower':(d['lo']+d['new']-d['hi'] if d['linked'] and d['hi'] is not None and d['lo'] is not None else d['lo']), 'link-enabled':(d['lo'] is not None and d['hi'] is not None), 'reversal-warning':(d['lo'] is not None and d['hi'] is not None and d['lo']>d['hi'])}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'lo': None, 'hi': None, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': None, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 3, 'linked-lower': -1, 'link-enabled': True, 'reversal-warning': False}), ({'lo': None, 'hi': None, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': None, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': None, 'hi': 2, 'new': 1, 'lock': False, 'linked': False}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 2, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': None, 'hi': 5, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': 5, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': None, 'hi': 5, 'new': 7, 'lock': True, 'linked': False}, {'lower-clamp': 5, 'upper-clamp': 7, 'linked-upper': 5, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': None, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': None, 'linked-lower': 0, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': 1, 'lock': False, 'linked': False}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 2, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': 4, 'linked-lower': -6, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': 7, 'lock': True, 'linked': False}, {'lower-clamp': 5, 'upper-clamp': 7, 'linked-upper': 5, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False})], 2: [({'lo': None, 'hi': None, 'new': -1, 'lock': True, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': None, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': 4, 'linked-lower': -6, 'link-enabled': True, 'reversal-warning': False}), ({'lo': None, 'hi': 2, 'new': -1, 'lock': True, 'linked': False}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': 2, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': None, 'hi': 2, 'new': 7, 'lock': True, 'linked': True}, {'lower-clamp': 2, 'upper-clamp': 7, 'linked-upper': 2, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': None, 'hi': 5, 'new': 7, 'lock': False, 'linked': False}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': 5, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': None, 'new': 1, 'lock': False, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': None, 'linked-lower': 0, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': -1, 'lock': True, 'linked': False}, {'lower-clamp': -1, 'upper-clamp': 0, 'linked-upper': 2, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': 7, 'lock': True, 'linked': True}, {'lower-clamp': 2, 'upper-clamp': 7, 'linked-upper': 9, 'linked-lower': 5, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': 7, 'lock': False, 'linked': False}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': 5, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 5, 'hi': None, 'new': 1, 'lock': False, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': None, 'linked-lower': 5, 'link-enabled': False, 'reversal-warning': False})], 3: [({'lo': None, 'hi': None, 'new': 1, 'lock': False, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': None, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 6, 'linked-lower': -4, 'link-enabled': True, 'reversal-warning': False}), ({'lo': None, 'hi': 2, 'new': 7, 'lock': False, 'linked': True}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': 2, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': None, 'hi': 5, 'new': 1, 'lock': True, 'linked': False}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 5, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': None, 'new': -1, 'lock': True, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': 0, 'linked-upper': None, 'linked-lower': 0, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': -1, 'lock': False, 'linked': False}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': 2, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': 7, 'lock': False, 'linked': True}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': 9, 'linked-lower': 5, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': 1, 'lock': True, 'linked': False}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 5, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 5, 'hi': None, 'new': -1, 'lock': True, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': 5, 'linked-upper': None, 'linked-lower': 5, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 5, 'hi': 2, 'new': -1, 'lock': False, 'linked': False}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': 2, 'linked-lower': 5, 'link-enabled': True, 'reversal-warning': True})], 4: [({'lo': None, 'hi': None, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': None, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 5, 'hi': 2, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': -4, 'linked-lower': 2, 'link-enabled': True, 'reversal-warning': True}), ({'lo': None, 'hi': 5, 'new': 1, 'lock': False, 'linked': False}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 5, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': None, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': None, 'linked-lower': 0, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': None, 'new': 7, 'lock': True, 'linked': False}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': None, 'linked-lower': 0, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 3, 'linked-lower': -1, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': 1, 'lock': False, 'linked': False}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 5, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 5, 'hi': None, 'new': -1, 'lock': False, 'linked': True}, {'lower-clamp': -1, 'upper-clamp': -1, 'linked-upper': None, 'linked-lower': 5, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 5, 'hi': None, 'new': 7, 'lock': True, 'linked': False}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': None, 'linked-lower': 5, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 5, 'hi': 2, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 5, 'linked-upper': -2, 'linked-lower': 4, 'link-enabled': True, 'reversal-warning': True})], 5: [({'lo': None, 'hi': None, 'new': 7, 'lock': False, 'linked': True}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': None, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 5, 'hi': 2, 'new': 1, 'lock': True, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 5, 'linked-upper': -2, 'linked-lower': 4, 'link-enabled': True, 'reversal-warning': True}), ({'lo': None, 'hi': 5, 'new': 7, 'lock': True, 'linked': True}, {'lower-clamp': 5, 'upper-clamp': 7, 'linked-upper': 5, 'linked-lower': None, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': None, 'new': 7, 'lock': False, 'linked': False}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': None, 'linked-lower': 0, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 0, 'hi': 2, 'new': 1, 'lock': False, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': 3, 'linked-lower': -1, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': -1, 'lock': True, 'linked': False}, {'lower-clamp': -1, 'upper-clamp': 0, 'linked-upper': 5, 'linked-lower': 0, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 0, 'hi': 5, 'new': 7, 'lock': True, 'linked': True}, {'lower-clamp': 5, 'upper-clamp': 7, 'linked-upper': 12, 'linked-lower': 2, 'link-enabled': True, 'reversal-warning': False}), ({'lo': 5, 'hi': None, 'new': 7, 'lock': False, 'linked': False}, {'lower-clamp': 7, 'upper-clamp': 7, 'linked-upper': None, 'linked-lower': 5, 'link-enabled': False, 'reversal-warning': False}), ({'lo': 5, 'hi': 2, 'new': 1, 'lock': False, 'linked': True}, {'lower-clamp': 1, 'upper-clamp': 1, 'linked-upper': -2, 'linked-lower': 4, 'link-enabled': True, 'reversal-warning': True}), ({'lo': 5, 'hi': 5, 'new': -1, 'lock': True, 'linked': False}, {'lower-clamp': -1, 'upper-clamp': 5, 'linked-upper': 5, 'linked-lower': 5, 'link-enabled': True, 'reversal-warning': False})]}
for index, (data, expected) in enumerate(fixtures[N]):
    check("contract fixture " + str(index), solve(data), expected)
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 fixtureActualExpectedOutcome
contract fixture 0{'link-enabled': False, 'linked-lower': None, 'linked-upper': None, 'lower-clamp': -1, 'reversal-warning': False, 'upper-clamp': -1}{'link-enabled': False, 'linked-lower': None, 'linked-upper': None, 'lower-clamp': -1, 'reversal-warning': False, 'upper-clamp': -1}Passed
contract fixture 1{'link-enabled': True, 'linked-lower': -1, 'linked-upper': 2, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}{'link-enabled': True, 'linked-lower': -1, 'linked-upper': 3, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}Failed
contract fixture 2{'link-enabled': False, 'linked-lower': None, 'linked-upper': None, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}{'link-enabled': False, 'linked-lower': None, 'linked-upper': None, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}Passed
contract fixture 3{'link-enabled': False, 'linked-lower': None, 'linked-upper': 2, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}{'link-enabled': False, 'linked-lower': None, 'linked-upper': 2, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}Passed
contract fixture 4{'link-enabled': False, 'linked-lower': None, 'linked-upper': 5, 'lower-clamp': -1, 'reversal-warning': False, 'upper-clamp': -1}{'link-enabled': False, 'linked-lower': None, 'linked-upper': 5, 'lower-clamp': -1, 'reversal-warning': False, 'upper-clamp': -1}Passed
contract fixture 5{'link-enabled': False, 'linked-lower': None, 'linked-upper': 5, 'lower-clamp': 5, 'reversal-warning': False, 'upper-clamp': 7}{'link-enabled': False, 'linked-lower': None, 'linked-upper': 5, 'lower-clamp': 5, 'reversal-warning': False, 'upper-clamp': 7}Passed
contract fixture 6{'link-enabled': False, 'linked-lower': 0, 'linked-upper': None, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}{'link-enabled': False, 'linked-lower': 0, 'linked-upper': None, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}Passed
contract fixture 7{'link-enabled': True, 'linked-lower': 0, 'linked-upper': 2, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}{'link-enabled': True, 'linked-lower': 0, 'linked-upper': 2, 'lower-clamp': 1, 'reversal-warning': False, 'upper-clamp': 1}Passed
contract fixture 8{'link-enabled': True, 'linked-lower': -6, 'linked-upper': 5, 'lower-clamp': -1, 'reversal-warning': False, 'upper-clamp': -1}{'link-enabled': True, 'linked-lower': -6, 'linked-upper': 4, 'lower-clamp': -1, 'reversal-warning': False, 'upper-clamp': -1}Failed
contract fixture 9{'link-enabled': True, 'linked-lower': 0, 'linked-upper': 5, 'lower-clamp': 5, 'reversal-warning': False, 'upper-clamp': 7}{'link-enabled': True, 'linked-lower': 0, 'linked-upper': 5, 'lower-clamp': 5, 'reversal-warning': False, 'upper-clamp': 7}Passed

SHA-256 / a8961f0744e0adced8c9541548f5fca69813456bba159c39a2bff116260a6321

HELD IN THE MEMBER ARCHIVE

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

This mechanism has 10 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.

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Verification & scope

Deterministic bounded UI-state model only; no browser, query engine, network, or production-standard conformance is claimed. 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 2026-09-29T14:41:10.732524+00:00.

Case digest / e183609fdd93ddaf9e4156867b849e272a34262e4e339043b4fff1ba5b66316d