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FA-23996 / Client state / Open access

Deferred render transition state: Suspension preserves prior screen · case 01

Suspension preserves prior screen.

Verified by executionVariant 1 · 60 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The suspension-preserves-prior-screen client decision evaluates `fallback if suspended else urgent` instead of `previous if suspended and previous is not None else (fallback if suspended else urgent)`.

THE FAILURE

The suspension-preserves-prior-screen client decision evaluates `fallback if suspended else urgent` instead of `previous if suspended and previous is not None else (fallback if suspended else urgent)`.

Unsuccessful approach: The partial repair `previous if suspended and previous else (fallback if suspended else urgent)` still violates the explicit fixture contract.

Case contract

Urgent input echoes immediately while deferred content may lag. Only the active transition can commit or clear pending work. A suspended update retains any prior screen, including empty text; first render uses fallback. Operation suspension-preserves-prior-screen has the six explicit input/output oracles below.

Why this case matters

An offline client lifecycle model that isolates a state-management defect without DOM rendering or network services.

1 / The failure

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

N = 1
observations = []
def solve(operation, s):
    urgent, deferred, pending, active_generation, result_generation, suspended, previous, fallback = s
    if operation == 'urgent-value-echo':
        return urgent
    if operation == 'deferred-content-during-pending':
        return deferred if pending else urgent
    if operation == 'stale-transition-result':
        return result_generation==active_generation
    if operation == 'suspension-preserves-prior-screen':
        return fallback if suspended else urgent
    if operation == 'pending-indicator-not-equality':
        return pending
    if operation == 'commit-clears-only-current-pending':
        return pending and result_generation!=active_generation
    if operation == 'deferred-value-commit':
        return urgent if result_generation==active_generation and not suspended else deferred
    if operation == 'fallback-first-render':
        return suspended and previous is None
    if operation == 'transition-target-identity':
        return (active_generation,urgent)
    if operation == 'previous-empty-screen':
        return previous is not None
    raise ValueError('unknown modeled operation')
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('urgent-value-echo scenario 1', solve('urgent-value-echo', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), 'q'+str(N))
check('urgent-value-echo scenario 2', solve('urgent-value-echo', ('','',False,1,1,False,'old','wait')), '')
check('urgent-value-echo scenario 3', solve('urgent-value-echo', ('new','old',True,2,2,True,'screen','spinner')), 'new')
check('urgent-value-echo scenario 4', solve('urgent-value-echo', ('new','old',True,2,2,False,None,'spinner')), 'new')
check('urgent-value-echo scenario 5', solve('urgent-value-echo', ('x','x',False,3,2,True,None,'spinner')), 'x')
check('urgent-value-echo scenario 6', solve('urgent-value-echo', ('','old',False,3,3,True,'','spinner')), '')
check('deferred-content-during-pending scenario 1', solve('deferred-content-during-pending', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), 'old')
check('deferred-content-during-pending scenario 2', solve('deferred-content-during-pending', ('','',False,1,1,False,'old','wait')), '')
check('deferred-content-during-pending scenario 3', solve('deferred-content-during-pending', ('new','old',True,2,2,True,'screen','spinner')), 'old')
check('deferred-content-during-pending scenario 4', solve('deferred-content-during-pending', ('new','old',True,2,2,False,None,'spinner')), 'old')
check('deferred-content-during-pending scenario 5', solve('deferred-content-during-pending', ('x','x',False,3,2,True,None,'spinner')), 'x')
check('deferred-content-during-pending scenario 6', solve('deferred-content-during-pending', ('','old',False,3,3,True,'','spinner')), '')
check('stale-transition-result scenario 1', solve('stale-transition-result', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), False)
check('stale-transition-result scenario 2', solve('stale-transition-result', ('','',False,1,1,False,'old','wait')), True)
check('stale-transition-result scenario 3', solve('stale-transition-result', ('new','old',True,2,2,True,'screen','spinner')), True)
check('stale-transition-result scenario 4', solve('stale-transition-result', ('new','old',True,2,2,False,None,'spinner')), True)
check('stale-transition-result scenario 5', solve('stale-transition-result', ('x','x',False,3,2,True,None,'spinner')), False)
check('stale-transition-result scenario 6', solve('stale-transition-result', ('','old',False,3,3,True,'','spinner')), True)
check('suspension-preserves-prior-screen scenario 1', solve('suspension-preserves-prior-screen', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), 'q'+str(N))
check('suspension-preserves-prior-screen scenario 2', solve('suspension-preserves-prior-screen', ('','',False,1,1,False,'old','wait')), '')
check('suspension-preserves-prior-screen scenario 3', solve('suspension-preserves-prior-screen', ('new','old',True,2,2,True,'screen','spinner')), 'screen')
check('suspension-preserves-prior-screen scenario 4', solve('suspension-preserves-prior-screen', ('new','old',True,2,2,False,None,'spinner')), 'new')
check('suspension-preserves-prior-screen scenario 5', solve('suspension-preserves-prior-screen', ('x','x',False,3,2,True,None,'spinner')), 'spinner')
check('suspension-preserves-prior-screen scenario 6', solve('suspension-preserves-prior-screen', ('','old',False,3,3,True,'','spinner')), '')
check('pending-indicator-not-equality scenario 1', solve('pending-indicator-not-equality', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), True)
check('pending-indicator-not-equality scenario 2', solve('pending-indicator-not-equality', ('','',False,1,1,False,'old','wait')), False)
check('pending-indicator-not-equality scenario 3', solve('pending-indicator-not-equality', ('new','old',True,2,2,True,'screen','spinner')), True)
check('pending-indicator-not-equality scenario 4', solve('pending-indicator-not-equality', ('new','old',True,2,2,False,None,'spinner')), True)
check('pending-indicator-not-equality scenario 5', solve('pending-indicator-not-equality', ('x','x',False,3,2,True,None,'spinner')), False)
check('pending-indicator-not-equality scenario 6', solve('pending-indicator-not-equality', ('','old',False,3,3,True,'','spinner')), False)
check('commit-clears-only-current-pending scenario 1', solve('commit-clears-only-current-pending', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), True)
check('commit-clears-only-current-pending scenario 2', solve('commit-clears-only-current-pending', ('','',False,1,1,False,'old','wait')), False)
check('commit-clears-only-current-pending scenario 3', solve('commit-clears-only-current-pending', ('new','old',True,2,2,True,'screen','spinner')), False)
check('commit-clears-only-current-pending scenario 4', solve('commit-clears-only-current-pending', ('new','old',True,2,2,False,None,'spinner')), False)
check('commit-clears-only-current-pending scenario 5', solve('commit-clears-only-current-pending', ('x','x',False,3,2,True,None,'spinner')), False)
check('commit-clears-only-current-pending scenario 6', solve('commit-clears-only-current-pending', ('','old',False,3,3,True,'','spinner')), False)
check('deferred-value-commit scenario 1', solve('deferred-value-commit', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), 'old')
check('deferred-value-commit scenario 2', solve('deferred-value-commit', ('','',False,1,1,False,'old','wait')), '')
check('deferred-value-commit scenario 3', solve('deferred-value-commit', ('new','old',True,2,2,True,'screen','spinner')), 'old')
check('deferred-value-commit scenario 4', solve('deferred-value-commit', ('new','old',True,2,2,False,None,'spinner')), 'new')
check('deferred-value-commit scenario 5', solve('deferred-value-commit', ('x','x',False,3,2,True,None,'spinner')), 'x')
check('deferred-value-commit scenario 6', solve('deferred-value-commit', ('','old',False,3,3,True,'','spinner')), 'old')
check('fallback-first-render scenario 1', solve('fallback-first-render', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), False)
check('fallback-first-render scenario 2', solve('fallback-first-render', ('','',False,1,1,False,'old','wait')), False)
check('fallback-first-render scenario 3', solve('fallback-first-render', ('new','old',True,2,2,True,'screen','spinner')), False)
check('fallback-first-render scenario 4', solve('fallback-first-render', ('new','old',True,2,2,False,None,'spinner')), False)
check('fallback-first-render scenario 5', solve('fallback-first-render', ('x','x',False,3,2,True,None,'spinner')), True)
check('fallback-first-render scenario 6', solve('fallback-first-render', ('','old',False,3,3,True,'','spinner')), False)
check('transition-target-identity scenario 1', solve('transition-target-identity', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), (2,'q'+str(N)))
check('transition-target-identity scenario 2', solve('transition-target-identity', ('','',False,1,1,False,'old','wait')), (1,''))
check('transition-target-identity scenario 3', solve('transition-target-identity', ('new','old',True,2,2,True,'screen','spinner')), (2,'new'))
check('transition-target-identity scenario 4', solve('transition-target-identity', ('new','old',True,2,2,False,None,'spinner')), (2,'new'))
check('transition-target-identity scenario 5', solve('transition-target-identity', ('x','x',False,3,2,True,None,'spinner')), (3,'x'))
check('transition-target-identity scenario 6', solve('transition-target-identity', ('','old',False,3,3,True,'','spinner')), (3,''))
check('previous-empty-screen scenario 1', solve('previous-empty-screen', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), True)
check('previous-empty-screen scenario 2', solve('previous-empty-screen', ('','',False,1,1,False,'old','wait')), True)
check('previous-empty-screen scenario 3', solve('previous-empty-screen', ('new','old',True,2,2,True,'screen','spinner')), True)
check('previous-empty-screen scenario 4', solve('previous-empty-screen', ('new','old',True,2,2,False,None,'spinner')), False)
check('previous-empty-screen scenario 5', solve('previous-empty-screen', ('x','x',False,3,2,True,None,'spinner')), False)
check('previous-empty-screen scenario 6', solve('previous-empty-screen', ('','old',False,3,3,True,'','spinner')), 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 fixtureActualExpectedOutcome
urgent-value-echo scenario 1q1q1Passed
urgent-value-echo scenario 2Passed
urgent-value-echo scenario 3newnewPassed
urgent-value-echo scenario 4newnewPassed
urgent-value-echo scenario 5xxPassed
urgent-value-echo scenario 6Passed
deferred-content-during-pending scenario 1oldoldPassed
deferred-content-during-pending scenario 2Passed
deferred-content-during-pending scenario 3oldoldPassed
deferred-content-during-pending scenario 4oldoldPassed
deferred-content-during-pending scenario 5xxPassed
deferred-content-during-pending scenario 6Passed
stale-transition-result scenario 1FalseFalsePassed
stale-transition-result scenario 2TrueTruePassed
stale-transition-result scenario 3TrueTruePassed
stale-transition-result scenario 4TrueTruePassed
stale-transition-result scenario 5FalseFalsePassed
stale-transition-result scenario 6TrueTruePassed
suspension-preserves-prior-screen scenario 1q1q1Passed
suspension-preserves-prior-screen scenario 2Passed
suspension-preserves-prior-screen scenario 3spinnerscreenFailed
suspension-preserves-prior-screen scenario 4newnewPassed
suspension-preserves-prior-screen scenario 5spinnerspinnerPassed
suspension-preserves-prior-screen scenario 6spinnerFailed
pending-indicator-not-equality scenario 1TrueTruePassed
pending-indicator-not-equality scenario 2FalseFalsePassed
pending-indicator-not-equality scenario 3TrueTruePassed
pending-indicator-not-equality scenario 4TrueTruePassed
pending-indicator-not-equality scenario 5FalseFalsePassed
pending-indicator-not-equality scenario 6FalseFalsePassed
commit-clears-only-current-pending scenario 1TrueTruePassed
commit-clears-only-current-pending scenario 2FalseFalsePassed
commit-clears-only-current-pending scenario 3FalseFalsePassed
commit-clears-only-current-pending scenario 4FalseFalsePassed
commit-clears-only-current-pending scenario 5FalseFalsePassed
commit-clears-only-current-pending scenario 6FalseFalsePassed
deferred-value-commit scenario 1oldoldPassed
deferred-value-commit scenario 2Passed
deferred-value-commit scenario 3oldoldPassed
deferred-value-commit scenario 4newnewPassed
deferred-value-commit scenario 5xxPassed
deferred-value-commit scenario 6oldoldPassed
fallback-first-render scenario 1FalseFalsePassed
fallback-first-render scenario 2FalseFalsePassed
fallback-first-render scenario 3FalseFalsePassed
fallback-first-render scenario 4FalseFalsePassed
fallback-first-render scenario 5TrueTruePassed
fallback-first-render scenario 6FalseFalsePassed
transition-target-identity scenario 1[2, 'q1'][2, 'q1']Passed
transition-target-identity scenario 2[1, ''][1, '']Passed
transition-target-identity scenario 3[2, 'new'][2, 'new']Passed
transition-target-identity scenario 4[2, 'new'][2, 'new']Passed
transition-target-identity scenario 5[3, 'x'][3, 'x']Passed
transition-target-identity scenario 6[3, ''][3, '']Passed
previous-empty-screen scenario 1TrueTruePassed
previous-empty-screen scenario 2TrueTruePassed
previous-empty-screen scenario 3TrueTruePassed
previous-empty-screen scenario 4FalseFalsePassed
previous-empty-screen scenario 5FalseFalsePassed
previous-empty-screen scenario 6TrueTruePassed

SHA-256 / 325b6fabbd91d2bf19b1c27821fe5533efce182a73910d4f6baa6abc5b40ccff

2 / The unsuccessful fix

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

N = 1
observations = []
def solve(operation, s):
    urgent, deferred, pending, active_generation, result_generation, suspended, previous, fallback = s
    if operation == 'urgent-value-echo':
        return urgent
    if operation == 'deferred-content-during-pending':
        return deferred if pending else urgent
    if operation == 'stale-transition-result':
        return result_generation==active_generation
    if operation == 'suspension-preserves-prior-screen':
        return previous if suspended and previous else (fallback if suspended else urgent)
    if operation == 'pending-indicator-not-equality':
        return pending
    if operation == 'commit-clears-only-current-pending':
        return pending and result_generation!=active_generation
    if operation == 'deferred-value-commit':
        return urgent if result_generation==active_generation and not suspended else deferred
    if operation == 'fallback-first-render':
        return suspended and previous is None
    if operation == 'transition-target-identity':
        return (active_generation,urgent)
    if operation == 'previous-empty-screen':
        return previous is not None
    raise ValueError('unknown modeled operation')
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('urgent-value-echo scenario 1', solve('urgent-value-echo', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), 'q'+str(N))
check('urgent-value-echo scenario 2', solve('urgent-value-echo', ('','',False,1,1,False,'old','wait')), '')
check('urgent-value-echo scenario 3', solve('urgent-value-echo', ('new','old',True,2,2,True,'screen','spinner')), 'new')
check('urgent-value-echo scenario 4', solve('urgent-value-echo', ('new','old',True,2,2,False,None,'spinner')), 'new')
check('urgent-value-echo scenario 5', solve('urgent-value-echo', ('x','x',False,3,2,True,None,'spinner')), 'x')
check('urgent-value-echo scenario 6', solve('urgent-value-echo', ('','old',False,3,3,True,'','spinner')), '')
check('deferred-content-during-pending scenario 1', solve('deferred-content-during-pending', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), 'old')
check('deferred-content-during-pending scenario 2', solve('deferred-content-during-pending', ('','',False,1,1,False,'old','wait')), '')
check('deferred-content-during-pending scenario 3', solve('deferred-content-during-pending', ('new','old',True,2,2,True,'screen','spinner')), 'old')
check('deferred-content-during-pending scenario 4', solve('deferred-content-during-pending', ('new','old',True,2,2,False,None,'spinner')), 'old')
check('deferred-content-during-pending scenario 5', solve('deferred-content-during-pending', ('x','x',False,3,2,True,None,'spinner')), 'x')
check('deferred-content-during-pending scenario 6', solve('deferred-content-during-pending', ('','old',False,3,3,True,'','spinner')), '')
check('stale-transition-result scenario 1', solve('stale-transition-result', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), False)
check('stale-transition-result scenario 2', solve('stale-transition-result', ('','',False,1,1,False,'old','wait')), True)
check('stale-transition-result scenario 3', solve('stale-transition-result', ('new','old',True,2,2,True,'screen','spinner')), True)
check('stale-transition-result scenario 4', solve('stale-transition-result', ('new','old',True,2,2,False,None,'spinner')), True)
check('stale-transition-result scenario 5', solve('stale-transition-result', ('x','x',False,3,2,True,None,'spinner')), False)
check('stale-transition-result scenario 6', solve('stale-transition-result', ('','old',False,3,3,True,'','spinner')), True)
check('suspension-preserves-prior-screen scenario 1', solve('suspension-preserves-prior-screen', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), 'q'+str(N))
check('suspension-preserves-prior-screen scenario 2', solve('suspension-preserves-prior-screen', ('','',False,1,1,False,'old','wait')), '')
check('suspension-preserves-prior-screen scenario 3', solve('suspension-preserves-prior-screen', ('new','old',True,2,2,True,'screen','spinner')), 'screen')
check('suspension-preserves-prior-screen scenario 4', solve('suspension-preserves-prior-screen', ('new','old',True,2,2,False,None,'spinner')), 'new')
check('suspension-preserves-prior-screen scenario 5', solve('suspension-preserves-prior-screen', ('x','x',False,3,2,True,None,'spinner')), 'spinner')
check('suspension-preserves-prior-screen scenario 6', solve('suspension-preserves-prior-screen', ('','old',False,3,3,True,'','spinner')), '')
check('pending-indicator-not-equality scenario 1', solve('pending-indicator-not-equality', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), True)
check('pending-indicator-not-equality scenario 2', solve('pending-indicator-not-equality', ('','',False,1,1,False,'old','wait')), False)
check('pending-indicator-not-equality scenario 3', solve('pending-indicator-not-equality', ('new','old',True,2,2,True,'screen','spinner')), True)
check('pending-indicator-not-equality scenario 4', solve('pending-indicator-not-equality', ('new','old',True,2,2,False,None,'spinner')), True)
check('pending-indicator-not-equality scenario 5', solve('pending-indicator-not-equality', ('x','x',False,3,2,True,None,'spinner')), False)
check('pending-indicator-not-equality scenario 6', solve('pending-indicator-not-equality', ('','old',False,3,3,True,'','spinner')), False)
check('commit-clears-only-current-pending scenario 1', solve('commit-clears-only-current-pending', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), True)
check('commit-clears-only-current-pending scenario 2', solve('commit-clears-only-current-pending', ('','',False,1,1,False,'old','wait')), False)
check('commit-clears-only-current-pending scenario 3', solve('commit-clears-only-current-pending', ('new','old',True,2,2,True,'screen','spinner')), False)
check('commit-clears-only-current-pending scenario 4', solve('commit-clears-only-current-pending', ('new','old',True,2,2,False,None,'spinner')), False)
check('commit-clears-only-current-pending scenario 5', solve('commit-clears-only-current-pending', ('x','x',False,3,2,True,None,'spinner')), False)
check('commit-clears-only-current-pending scenario 6', solve('commit-clears-only-current-pending', ('','old',False,3,3,True,'','spinner')), False)
check('deferred-value-commit scenario 1', solve('deferred-value-commit', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), 'old')
check('deferred-value-commit scenario 2', solve('deferred-value-commit', ('','',False,1,1,False,'old','wait')), '')
check('deferred-value-commit scenario 3', solve('deferred-value-commit', ('new','old',True,2,2,True,'screen','spinner')), 'old')
check('deferred-value-commit scenario 4', solve('deferred-value-commit', ('new','old',True,2,2,False,None,'spinner')), 'new')
check('deferred-value-commit scenario 5', solve('deferred-value-commit', ('x','x',False,3,2,True,None,'spinner')), 'x')
check('deferred-value-commit scenario 6', solve('deferred-value-commit', ('','old',False,3,3,True,'','spinner')), 'old')
check('fallback-first-render scenario 1', solve('fallback-first-render', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), False)
check('fallback-first-render scenario 2', solve('fallback-first-render', ('','',False,1,1,False,'old','wait')), False)
check('fallback-first-render scenario 3', solve('fallback-first-render', ('new','old',True,2,2,True,'screen','spinner')), False)
check('fallback-first-render scenario 4', solve('fallback-first-render', ('new','old',True,2,2,False,None,'spinner')), False)
check('fallback-first-render scenario 5', solve('fallback-first-render', ('x','x',False,3,2,True,None,'spinner')), True)
check('fallback-first-render scenario 6', solve('fallback-first-render', ('','old',False,3,3,True,'','spinner')), False)
check('transition-target-identity scenario 1', solve('transition-target-identity', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), (2,'q'+str(N)))
check('transition-target-identity scenario 2', solve('transition-target-identity', ('','',False,1,1,False,'old','wait')), (1,''))
check('transition-target-identity scenario 3', solve('transition-target-identity', ('new','old',True,2,2,True,'screen','spinner')), (2,'new'))
check('transition-target-identity scenario 4', solve('transition-target-identity', ('new','old',True,2,2,False,None,'spinner')), (2,'new'))
check('transition-target-identity scenario 5', solve('transition-target-identity', ('x','x',False,3,2,True,None,'spinner')), (3,'x'))
check('transition-target-identity scenario 6', solve('transition-target-identity', ('','old',False,3,3,True,'','spinner')), (3,''))
check('previous-empty-screen scenario 1', solve('previous-empty-screen', ('q'+str(N),'old',True,2,1,False,'screen','spinner')), True)
check('previous-empty-screen scenario 2', solve('previous-empty-screen', ('','',False,1,1,False,'old','wait')), True)
check('previous-empty-screen scenario 3', solve('previous-empty-screen', ('new','old',True,2,2,True,'screen','spinner')), True)
check('previous-empty-screen scenario 4', solve('previous-empty-screen', ('new','old',True,2,2,False,None,'spinner')), False)
check('previous-empty-screen scenario 5', solve('previous-empty-screen', ('x','x',False,3,2,True,None,'spinner')), False)
check('previous-empty-screen scenario 6', solve('previous-empty-screen', ('','old',False,3,3,True,'','spinner')), 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 fixtureActualExpectedOutcome
urgent-value-echo scenario 1q1q1Passed
urgent-value-echo scenario 2Passed
urgent-value-echo scenario 3newnewPassed
urgent-value-echo scenario 4newnewPassed
urgent-value-echo scenario 5xxPassed
urgent-value-echo scenario 6Passed
deferred-content-during-pending scenario 1oldoldPassed
deferred-content-during-pending scenario 2Passed
deferred-content-during-pending scenario 3oldoldPassed
deferred-content-during-pending scenario 4oldoldPassed
deferred-content-during-pending scenario 5xxPassed
deferred-content-during-pending scenario 6Passed
stale-transition-result scenario 1FalseFalsePassed
stale-transition-result scenario 2TrueTruePassed
stale-transition-result scenario 3TrueTruePassed
stale-transition-result scenario 4TrueTruePassed
stale-transition-result scenario 5FalseFalsePassed
stale-transition-result scenario 6TrueTruePassed
suspension-preserves-prior-screen scenario 1q1q1Passed
suspension-preserves-prior-screen scenario 2Passed
suspension-preserves-prior-screen scenario 3screenscreenPassed
suspension-preserves-prior-screen scenario 4newnewPassed
suspension-preserves-prior-screen scenario 5spinnerspinnerPassed
suspension-preserves-prior-screen scenario 6spinnerFailed
pending-indicator-not-equality scenario 1TrueTruePassed
pending-indicator-not-equality scenario 2FalseFalsePassed
pending-indicator-not-equality scenario 3TrueTruePassed
pending-indicator-not-equality scenario 4TrueTruePassed
pending-indicator-not-equality scenario 5FalseFalsePassed
pending-indicator-not-equality scenario 6FalseFalsePassed
commit-clears-only-current-pending scenario 1TrueTruePassed
commit-clears-only-current-pending scenario 2FalseFalsePassed
commit-clears-only-current-pending scenario 3FalseFalsePassed
commit-clears-only-current-pending scenario 4FalseFalsePassed
commit-clears-only-current-pending scenario 5FalseFalsePassed
commit-clears-only-current-pending scenario 6FalseFalsePassed
deferred-value-commit scenario 1oldoldPassed
deferred-value-commit scenario 2Passed
deferred-value-commit scenario 3oldoldPassed
deferred-value-commit scenario 4newnewPassed
deferred-value-commit scenario 5xxPassed
deferred-value-commit scenario 6oldoldPassed
fallback-first-render scenario 1FalseFalsePassed
fallback-first-render scenario 2FalseFalsePassed
fallback-first-render scenario 3FalseFalsePassed
fallback-first-render scenario 4FalseFalsePassed
fallback-first-render scenario 5TrueTruePassed
fallback-first-render scenario 6FalseFalsePassed
transition-target-identity scenario 1[2, 'q1'][2, 'q1']Passed
transition-target-identity scenario 2[1, ''][1, '']Passed
transition-target-identity scenario 3[2, 'new'][2, 'new']Passed
transition-target-identity scenario 4[2, 'new'][2, 'new']Passed
transition-target-identity scenario 5[3, 'x'][3, 'x']Passed
transition-target-identity scenario 6[3, ''][3, '']Passed
previous-empty-screen scenario 1TrueTruePassed
previous-empty-screen scenario 2TrueTruePassed
previous-empty-screen scenario 3TrueTruePassed
previous-empty-screen scenario 4FalseFalsePassed
previous-empty-screen scenario 5FalseFalsePassed
previous-empty-screen scenario 6TrueTruePassed

SHA-256 / b6ce1ccbe3b1ea986fa6318a775ecb65381bbb7b72a4e9d36553c96c1ec51561

HELD IN THE MEMBER ARCHIVE

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

This mechanism has 60 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

Only the explicitly specified operations and finite deterministic records are modeled; no browser or framework 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 2026-09-29T14:40:53.227833+00:00.

Case digest / 06d06bd3d4627b5f1a1d1a8ad68f0cd6bd0de0bc0448fe2cae7f514c5ca8acbb