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FA-24921 / Filter interfaces / Open access

An open lower endpoint renders the domain minimum handle · case 01

An open lower endpoint renders the domain minimum handle is violated by the widget projection.

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

ROOT CAUSE

The lower-handle decision uses `int(d['lo'] or 0)` instead of the stipulated range-draft projection.

THE FAILURE

The lower-handle decision uses `int(d['lo'] or 0)` instead of the stipulated range-draft projection.

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

Case contract

A numeric range editor preserves open ends, treats zero as a bound, and rejects reversed finite endpoints before applying. This example checks: An open lower endpoint renders the domain minimum handle.

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-open':(None if d['lo']=='' else int(d['lo'])), 'upper-open':(None if d['hi']=='' else int(d['hi'])), 'endpoint-order':(d['lo']=='' or d['hi']=='' or int(d['lo'])<=int(d['hi'])), 'empty-constraint':(d['lo']=='' and d['hi']==''), 'lower-handle':(int(d['lo'] or 0)), 'upper-handle':(int(d['hi']) if d['hi']!='' else d['maximum'])}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'lo': '', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': True, 'lower-handle': -5, 'upper-handle': 20}), ({'lo': '0', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 10}), ({'lo': '2', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 20}), ({'lo': '2', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 0, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 0}), ({'lo': '2', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 2}), ({'lo': '2', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 10}), ({'lo': '10', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 20}), ({'lo': '10', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 0, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 0}), ({'lo': '10', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 2, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 2}), ({'lo': '10', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 10})], 2: [({'lo': '', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 0, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 0}), ({'lo': '2', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 2}), ({'lo': '10', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 2, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 2}), ({'lo': '10', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 10}), ({'lo': '', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': True, 'lower-handle': -5, 'upper-handle': 20}), ({'lo': '', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 2}), ({'lo': '', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 10}), ({'lo': '0', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 20}), ({'lo': '0', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 0, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 0}), ({'lo': '0', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 2})], 3: [({'lo': '', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 2}), ({'lo': '10', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 0, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 0}), ({'lo': '0', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 0, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 0}), ({'lo': '0', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 2}), ({'lo': '0', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 10}), ({'lo': '2', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 20}), ({'lo': '2', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 0, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 0}), ({'lo': '2', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 2}), ({'lo': '2', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 10}), ({'lo': '10', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 20})], 4: [({'lo': '', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 10}), ({'lo': '0', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 20}), ({'lo': '10', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 20}), ({'lo': '10', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 0, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 0}), ({'lo': '10', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 2, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 2}), ({'lo': '10', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 10}), ({'lo': '', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': True, 'lower-handle': -5, 'upper-handle': 20}), ({'lo': '', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 0, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 0}), ({'lo': '', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 2}), ({'lo': '0', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 0, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 0})], 5: [({'lo': '', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': True, 'lower-handle': -5, 'upper-handle': 20}), ({'lo': '0', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 10}), ({'lo': '', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 10}), ({'lo': '0', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 20}), ({'lo': '0', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 0, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 0}), ({'lo': '0', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 2}), ({'lo': '2', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 20}), ({'lo': '2', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 0, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 0}), ({'lo': '2', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 2}), ({'lo': '2', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 10})]}
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{'empty-constraint': True, 'endpoint-order': True, 'lower-handle': 0, 'lower-open': None, 'upper-handle': 20, 'upper-open': None}{'empty-constraint': True, 'endpoint-order': True, 'lower-handle': -5, 'lower-open': None, 'upper-handle': 20, 'upper-open': None}Failed
contract fixture 1{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 0, 'lower-open': 0, 'upper-handle': 10, 'upper-open': 10}{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 0, 'lower-open': 0, 'upper-handle': 10, 'upper-open': 10}Passed
contract fixture 2{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 2, 'lower-open': 2, 'upper-handle': 20, 'upper-open': None}{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 2, 'lower-open': 2, 'upper-handle': 20, 'upper-open': None}Passed
contract fixture 3{'empty-constraint': False, 'endpoint-order': False, 'lower-handle': 2, 'lower-open': 2, 'upper-handle': 0, 'upper-open': 0}{'empty-constraint': False, 'endpoint-order': False, 'lower-handle': 2, 'lower-open': 2, 'upper-handle': 0, 'upper-open': 0}Passed
contract fixture 4{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 2, 'lower-open': 2, 'upper-handle': 2, 'upper-open': 2}{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 2, 'lower-open': 2, 'upper-handle': 2, 'upper-open': 2}Passed
contract fixture 5{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 2, 'lower-open': 2, 'upper-handle': 10, 'upper-open': 10}{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 2, 'lower-open': 2, 'upper-handle': 10, 'upper-open': 10}Passed
contract fixture 6{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 10, 'lower-open': 10, 'upper-handle': 20, 'upper-open': None}{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 10, 'lower-open': 10, 'upper-handle': 20, 'upper-open': None}Passed
contract fixture 7{'empty-constraint': False, 'endpoint-order': False, 'lower-handle': 10, 'lower-open': 10, 'upper-handle': 0, 'upper-open': 0}{'empty-constraint': False, 'endpoint-order': False, 'lower-handle': 10, 'lower-open': 10, 'upper-handle': 0, 'upper-open': 0}Passed
contract fixture 8{'empty-constraint': False, 'endpoint-order': False, 'lower-handle': 10, 'lower-open': 10, 'upper-handle': 2, 'upper-open': 2}{'empty-constraint': False, 'endpoint-order': False, 'lower-handle': 10, 'lower-open': 10, 'upper-handle': 2, 'upper-open': 2}Passed
contract fixture 9{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 10, 'lower-open': 10, 'upper-handle': 10, 'upper-open': 10}{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 10, 'lower-open': 10, 'upper-handle': 10, 'upper-open': 10}Passed

SHA-256 / d7fd950d7179c284bd79d6a78b37b7d7d5573b48e710466590afb9dfdd00829e

2 / The unsuccessful fix

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

N = 1
observations = []
def solve(d):
    return {'lower-open':(None if d['lo']=='' else int(d['lo'])), 'upper-open':(None if d['hi']=='' else int(d['hi'])), 'endpoint-order':(d['lo']=='' or d['hi']=='' or int(d['lo'])<=int(d['hi'])), 'empty-constraint':(d['lo']=='' and d['hi']==''), 'lower-handle':(d['minimum']), 'upper-handle':(int(d['hi']) if d['hi']!='' else d['maximum'])}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'lo': '', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': True, 'lower-handle': -5, 'upper-handle': 20}), ({'lo': '0', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 10}), ({'lo': '2', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 20}), ({'lo': '2', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 0, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 0}), ({'lo': '2', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 2}), ({'lo': '2', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 10}), ({'lo': '10', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 20}), ({'lo': '10', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 0, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 0}), ({'lo': '10', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 2, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 2}), ({'lo': '10', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 10})], 2: [({'lo': '', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 0, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 0}), ({'lo': '2', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 2}), ({'lo': '10', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 2, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 2}), ({'lo': '10', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 10}), ({'lo': '', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': True, 'lower-handle': -5, 'upper-handle': 20}), ({'lo': '', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 2}), ({'lo': '', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 10}), ({'lo': '0', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 20}), ({'lo': '0', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 0, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 0}), ({'lo': '0', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 2})], 3: [({'lo': '', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 2}), ({'lo': '10', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 0, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 0}), ({'lo': '0', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 0, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 0}), ({'lo': '0', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 2}), ({'lo': '0', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 10}), ({'lo': '2', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 20}), ({'lo': '2', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 0, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 0}), ({'lo': '2', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 2}), ({'lo': '2', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 10}), ({'lo': '10', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 20})], 4: [({'lo': '', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 10}), ({'lo': '0', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 20}), ({'lo': '10', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 20}), ({'lo': '10', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 0, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 0}), ({'lo': '10', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 2, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 2}), ({'lo': '10', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 10, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 10, 'upper-handle': 10}), ({'lo': '', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': True, 'lower-handle': -5, 'upper-handle': 20}), ({'lo': '', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 0, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 0}), ({'lo': '', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 2}), ({'lo': '0', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 0, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 0})], 5: [({'lo': '', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': True, 'lower-handle': -5, 'upper-handle': 20}), ({'lo': '0', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 10}), ({'lo': '', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': None, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': -5, 'upper-handle': 10}), ({'lo': '0', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 20}), ({'lo': '0', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 0, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 0}), ({'lo': '0', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 0, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 0, 'upper-handle': 2}), ({'lo': '2', 'hi': '', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': None, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 20}), ({'lo': '2', 'hi': '0', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 0, 'endpoint-order': False, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 0}), ({'lo': '2', 'hi': '2', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 2, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 2}), ({'lo': '2', 'hi': '10', 'minimum': -5, 'maximum': 20}, {'lower-open': 2, 'upper-open': 10, 'endpoint-order': True, 'empty-constraint': False, 'lower-handle': 2, 'upper-handle': 10})]}
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{'empty-constraint': True, 'endpoint-order': True, 'lower-handle': -5, 'lower-open': None, 'upper-handle': 20, 'upper-open': None}{'empty-constraint': True, 'endpoint-order': True, 'lower-handle': -5, 'lower-open': None, 'upper-handle': 20, 'upper-open': None}Passed
contract fixture 1{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': -5, 'lower-open': 0, 'upper-handle': 10, 'upper-open': 10}{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 0, 'lower-open': 0, 'upper-handle': 10, 'upper-open': 10}Failed
contract fixture 2{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': -5, 'lower-open': 2, 'upper-handle': 20, 'upper-open': None}{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 2, 'lower-open': 2, 'upper-handle': 20, 'upper-open': None}Failed
contract fixture 3{'empty-constraint': False, 'endpoint-order': False, 'lower-handle': -5, 'lower-open': 2, 'upper-handle': 0, 'upper-open': 0}{'empty-constraint': False, 'endpoint-order': False, 'lower-handle': 2, 'lower-open': 2, 'upper-handle': 0, 'upper-open': 0}Failed
contract fixture 4{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': -5, 'lower-open': 2, 'upper-handle': 2, 'upper-open': 2}{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 2, 'lower-open': 2, 'upper-handle': 2, 'upper-open': 2}Failed
contract fixture 5{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': -5, 'lower-open': 2, 'upper-handle': 10, 'upper-open': 10}{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 2, 'lower-open': 2, 'upper-handle': 10, 'upper-open': 10}Failed
contract fixture 6{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': -5, 'lower-open': 10, 'upper-handle': 20, 'upper-open': None}{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 10, 'lower-open': 10, 'upper-handle': 20, 'upper-open': None}Failed
contract fixture 7{'empty-constraint': False, 'endpoint-order': False, 'lower-handle': -5, 'lower-open': 10, 'upper-handle': 0, 'upper-open': 0}{'empty-constraint': False, 'endpoint-order': False, 'lower-handle': 10, 'lower-open': 10, 'upper-handle': 0, 'upper-open': 0}Failed
contract fixture 8{'empty-constraint': False, 'endpoint-order': False, 'lower-handle': -5, 'lower-open': 10, 'upper-handle': 2, 'upper-open': 2}{'empty-constraint': False, 'endpoint-order': False, 'lower-handle': 10, 'lower-open': 10, 'upper-handle': 2, 'upper-open': 2}Failed
contract fixture 9{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': -5, 'lower-open': 10, 'upper-handle': 10, 'upper-open': 10}{'empty-constraint': False, 'endpoint-order': True, 'lower-handle': 10, 'lower-open': 10, 'upper-handle': 10, 'upper-open': 10}Failed

SHA-256 / 2993ba2beb169b5f3343c8808aba448380cd10dfe196f6020429d2585bfe586f

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 2026-09-29T14:41:01.940700+00:00.

Case digest / 4d4d7da20e0f656a578bd8d56f114a030c0aa6cf94c5da03599545fe4b5f967a