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FA-25876 / Filter interfaces / Open access

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

Moving a linked upper bound translates the lower 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-lower decision uses `d['new'] if d['linked'] else d['lo']` instead of the stipulated coupled-range-edit projection.

THE FAILURE

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

Unsuccessful approach: The attempted correction `d['lo']` 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 upper bound translates the lower 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['hi']+d['new']-d['lo'] if d['linked'] and d['hi'] is not None and d['lo'] is not None else d['hi']), 'linked-lower':(d['new'] if d['linked'] 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': -1, '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}Failed
contract fixture 1{'link-enabled': True, 'linked-lower': 1, 'linked-upper': 3, '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': 1, '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}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': -1, '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}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': 1, '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}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': -1, 'linked-upper': 4, '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 / d2931d3db0e737e9a97c5f15bb2c921b2c3b678928a233a7836b92fcaa8b94f0

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']+d['new']-d['lo'] if d['linked'] and d['hi'] is not None and d['lo'] is not None else d['hi']), 'linked-lower':(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': 0, 'linked-upper': 3, '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': 0, 'linked-upper': 4, '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 / c7fe22e42f3718192589d9d3921fa25e699bc1d34c5e66650d660a76a56c038f

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.

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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 / 6020531f225160175cc0b1fcbf037b84815b7b630ddc68b8da8bad4c44366a74