FA-35861 / Tab interfaces / Open access

Linked pane scroll: echo suppression · case 01

The tab workspace reports an incorrect echo suppression.

Verified by executionVariant 1 · 6 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The echo suppression decision uses True instead of x['token']!=x['last'].

VERIFIED REPAIR

Use the stipulated workspace rule: x['token']!=x['last'].

Unsuccessful approach: The partial repair x['token']<x['last'] still violates a workspace boundary or normal case.

Case contract

Linked views of one document synchronize only scroll events from the elected source; map proportional content positions into the peer range and suppress echoed tokens.

Why this case matters

Offline tab/panel workspace behavior; no browser or desktop framework is emulated.

1 / The failure

Exit 1

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

N = 1
observations = []
def solve(x):
    r0 = x['event_view']==x['source']
    r1 = x['doc']==x['peer_doc']
    r2 = True
    r3 = x['scroll']*x['peer_range']//x['source_range']
    r4 = min(x['peer_range'],max(0,x['scroll']*x['peer_range']//x['source_range']))
    r5 = x['token']
    return [r0,r1,r2,r3,r4,r5]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 4, 'last': 3, 'scroll': 40, 'source_range': 100, 'peer_range': 250}, [True, True, True, 100, 100, 4]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 4, 'last': 3, 'scroll': 40, 'source_range': 100, 'peer_range': 250}, [False, True, True, 100, 100, 4]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 4, 'last': 3, 'scroll': 40, 'source_range': 100, 'peer_range': 250}, [True, False, True, 100, 100, 4]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 3, 'last': 3, 'scroll': 40, 'source_range': 100, 'peer_range': 250}, [True, True, False, 100, 100, 3]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 4, 'last': 3, 'scroll': 0, 'source_range': 100, 'peer_range': 250}, [True, True, True, 0, 0, 4]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 4, 'last': 3, 'scroll': 100, 'source_range': 100, 'peer_range': 250}, [True, True, True, 250, 250, 4])], 2: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 8, 'last': 6, 'scroll': 80, 'source_range': 200, 'peer_range': 500}, [True, True, True, 200, 200, 8]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 8, 'last': 6, 'scroll': 80, 'source_range': 200, 'peer_range': 500}, [False, True, True, 200, 200, 8]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 8, 'last': 6, 'scroll': 80, 'source_range': 200, 'peer_range': 500}, [True, False, True, 200, 200, 8]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 6, 'last': 6, 'scroll': 80, 'source_range': 200, 'peer_range': 500}, [True, True, False, 200, 200, 6]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 8, 'last': 6, 'scroll': 0, 'source_range': 200, 'peer_range': 500}, [True, True, True, 0, 0, 8]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 8, 'last': 6, 'scroll': 200, 'source_range': 200, 'peer_range': 500}, [True, True, True, 500, 500, 8])], 3: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 9, 'scroll': 120, 'source_range': 300, 'peer_range': 750}, [True, True, True, 300, 300, 12]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 9, 'scroll': 120, 'source_range': 300, 'peer_range': 750}, [False, True, True, 300, 300, 12]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 12, 'last': 9, 'scroll': 120, 'source_range': 300, 'peer_range': 750}, [True, False, True, 300, 300, 12]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 9, 'last': 9, 'scroll': 120, 'source_range': 300, 'peer_range': 750}, [True, True, False, 300, 300, 9]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 9, 'scroll': 0, 'source_range': 300, 'peer_range': 750}, [True, True, True, 0, 0, 12]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 9, 'scroll': 300, 'source_range': 300, 'peer_range': 750}, [True, True, True, 750, 750, 12])], 4: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 16, 'last': 12, 'scroll': 160, 'source_range': 400, 'peer_range': 1000}, [True, True, True, 400, 400, 16]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 16, 'last': 12, 'scroll': 160, 'source_range': 400, 'peer_range': 1000}, [False, True, True, 400, 400, 16]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 16, 'last': 12, 'scroll': 160, 'source_range': 400, 'peer_range': 1000}, [True, False, True, 400, 400, 16]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 12, 'scroll': 160, 'source_range': 400, 'peer_range': 1000}, [True, True, False, 400, 400, 12]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 16, 'last': 12, 'scroll': 0, 'source_range': 400, 'peer_range': 1000}, [True, True, True, 0, 0, 16]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 16, 'last': 12, 'scroll': 400, 'source_range': 400, 'peer_range': 1000}, [True, True, True, 1000, 1000, 16])], 5: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 20, 'last': 15, 'scroll': 200, 'source_range': 500, 'peer_range': 1250}, [True, True, True, 500, 500, 20]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 20, 'last': 15, 'scroll': 200, 'source_range': 500, 'peer_range': 1250}, [False, True, True, 500, 500, 20]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 20, 'last': 15, 'scroll': 200, 'source_range': 500, 'peer_range': 1250}, [True, False, True, 500, 500, 20]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 15, 'last': 15, 'scroll': 200, 'source_range': 500, 'peer_range': 1250}, [True, True, False, 500, 500, 15]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 20, 'last': 15, 'scroll': 0, 'source_range': 500, 'peer_range': 1250}, [True, True, True, 0, 0, 20]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 20, 'last': 15, 'scroll': 500, 'source_range': 500, 'peer_range': 1250}, [True, True, True, 1250, 1250, 20])]}
for i, (inputs, expected) in enumerate(fixtures[N]):
    check("workspace regression "+str(i), solve(inputs), 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 fixture	Actual	Expected	Outcome
workspace regression 0	`[True, True, True, 100, 100, 4]`	`[True, True, True, 100, 100, 4]`	Passed
workspace regression 1	`[False, True, True, 100, 100, 4]`	`[False, True, True, 100, 100, 4]`	Passed
workspace regression 2	`[True, False, True, 100, 100, 4]`	`[True, False, True, 100, 100, 4]`	Passed
workspace regression 3	`[True, True, True, 100, 100, 3]`	`[True, True, False, 100, 100, 3]`	Failed
workspace regression 4	`[True, True, True, 0, 0, 4]`	`[True, True, True, 0, 0, 4]`	Passed
workspace regression 5	`[True, True, True, 250, 250, 4]`	`[True, True, True, 250, 250, 4]`	Passed

SHA-256 / 32b9063fce5e4ba71fd9d05c89927cc0d5609a5b79ef47fcccc7c039d68779f8

2 / The unsuccessful fix

Exit 1

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

N = 1
observations = []
def solve(x):
    r0 = x['event_view']==x['source']
    r1 = x['doc']==x['peer_doc']
    r2 = x['token']<x['last']
    r3 = x['scroll']*x['peer_range']//x['source_range']
    r4 = min(x['peer_range'],max(0,x['scroll']*x['peer_range']//x['source_range']))
    r5 = x['token']
    return [r0,r1,r2,r3,r4,r5]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 4, 'last': 3, 'scroll': 40, 'source_range': 100, 'peer_range': 250}, [True, True, True, 100, 100, 4]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 4, 'last': 3, 'scroll': 40, 'source_range': 100, 'peer_range': 250}, [False, True, True, 100, 100, 4]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 4, 'last': 3, 'scroll': 40, 'source_range': 100, 'peer_range': 250}, [True, False, True, 100, 100, 4]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 3, 'last': 3, 'scroll': 40, 'source_range': 100, 'peer_range': 250}, [True, True, False, 100, 100, 3]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 4, 'last': 3, 'scroll': 0, 'source_range': 100, 'peer_range': 250}, [True, True, True, 0, 0, 4]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 4, 'last': 3, 'scroll': 100, 'source_range': 100, 'peer_range': 250}, [True, True, True, 250, 250, 4])], 2: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 8, 'last': 6, 'scroll': 80, 'source_range': 200, 'peer_range': 500}, [True, True, True, 200, 200, 8]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 8, 'last': 6, 'scroll': 80, 'source_range': 200, 'peer_range': 500}, [False, True, True, 200, 200, 8]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 8, 'last': 6, 'scroll': 80, 'source_range': 200, 'peer_range': 500}, [True, False, True, 200, 200, 8]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 6, 'last': 6, 'scroll': 80, 'source_range': 200, 'peer_range': 500}, [True, True, False, 200, 200, 6]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 8, 'last': 6, 'scroll': 0, 'source_range': 200, 'peer_range': 500}, [True, True, True, 0, 0, 8]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 8, 'last': 6, 'scroll': 200, 'source_range': 200, 'peer_range': 500}, [True, True, True, 500, 500, 8])], 3: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 9, 'scroll': 120, 'source_range': 300, 'peer_range': 750}, [True, True, True, 300, 300, 12]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 9, 'scroll': 120, 'source_range': 300, 'peer_range': 750}, [False, True, True, 300, 300, 12]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 12, 'last': 9, 'scroll': 120, 'source_range': 300, 'peer_range': 750}, [True, False, True, 300, 300, 12]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 9, 'last': 9, 'scroll': 120, 'source_range': 300, 'peer_range': 750}, [True, True, False, 300, 300, 9]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 9, 'scroll': 0, 'source_range': 300, 'peer_range': 750}, [True, True, True, 0, 0, 12]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 9, 'scroll': 300, 'source_range': 300, 'peer_range': 750}, [True, True, True, 750, 750, 12])], 4: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 16, 'last': 12, 'scroll': 160, 'source_range': 400, 'peer_range': 1000}, [True, True, True, 400, 400, 16]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 16, 'last': 12, 'scroll': 160, 'source_range': 400, 'peer_range': 1000}, [False, True, True, 400, 400, 16]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 16, 'last': 12, 'scroll': 160, 'source_range': 400, 'peer_range': 1000}, [True, False, True, 400, 400, 16]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 12, 'scroll': 160, 'source_range': 400, 'peer_range': 1000}, [True, True, False, 400, 400, 12]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 16, 'last': 12, 'scroll': 0, 'source_range': 400, 'peer_range': 1000}, [True, True, True, 0, 0, 16]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 16, 'last': 12, 'scroll': 400, 'source_range': 400, 'peer_range': 1000}, [True, True, True, 1000, 1000, 16])], 5: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 20, 'last': 15, 'scroll': 200, 'source_range': 500, 'peer_range': 1250}, [True, True, True, 500, 500, 20]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 20, 'last': 15, 'scroll': 200, 'source_range': 500, 'peer_range': 1250}, [False, True, True, 500, 500, 20]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 20, 'last': 15, 'scroll': 200, 'source_range': 500, 'peer_range': 1250}, [True, False, True, 500, 500, 20]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 15, 'last': 15, 'scroll': 200, 'source_range': 500, 'peer_range': 1250}, [True, True, False, 500, 500, 15]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 20, 'last': 15, 'scroll': 0, 'source_range': 500, 'peer_range': 1250}, [True, True, True, 0, 0, 20]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 20, 'last': 15, 'scroll': 500, 'source_range': 500, 'peer_range': 1250}, [True, True, True, 1250, 1250, 20])]}
for i, (inputs, expected) in enumerate(fixtures[N]):
    check("workspace regression "+str(i), solve(inputs), 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 fixture	Actual	Expected	Outcome
workspace regression 0	`[True, True, False, 100, 100, 4]`	`[True, True, True, 100, 100, 4]`	Failed
workspace regression 1	`[False, True, False, 100, 100, 4]`	`[False, True, True, 100, 100, 4]`	Failed
workspace regression 2	`[True, False, False, 100, 100, 4]`	`[True, False, True, 100, 100, 4]`	Failed
workspace regression 3	`[True, True, False, 100, 100, 3]`	`[True, True, False, 100, 100, 3]`	Passed
workspace regression 4	`[True, True, False, 0, 0, 4]`	`[True, True, True, 0, 0, 4]`	Failed
workspace regression 5	`[True, True, False, 250, 250, 4]`	`[True, True, True, 250, 250, 4]`	Failed

SHA-256 / 61e1a83c6be1a420a540d8a5417a17c6f12c1b0cc13e7e5af1e128d4c518ce83

3 / The verified repair

Exit 0

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

N = 1
observations = []
def solve(x):
    r0 = x['event_view']==x['source']
    r1 = x['doc']==x['peer_doc']
    r2 = x['token']!=x['last']
    r3 = x['scroll']*x['peer_range']//x['source_range']
    r4 = min(x['peer_range'],max(0,x['scroll']*x['peer_range']//x['source_range']))
    r5 = x['token']
    return [r0,r1,r2,r3,r4,r5]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 4, 'last': 3, 'scroll': 40, 'source_range': 100, 'peer_range': 250}, [True, True, True, 100, 100, 4]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 4, 'last': 3, 'scroll': 40, 'source_range': 100, 'peer_range': 250}, [False, True, True, 100, 100, 4]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 4, 'last': 3, 'scroll': 40, 'source_range': 100, 'peer_range': 250}, [True, False, True, 100, 100, 4]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 3, 'last': 3, 'scroll': 40, 'source_range': 100, 'peer_range': 250}, [True, True, False, 100, 100, 3]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 4, 'last': 3, 'scroll': 0, 'source_range': 100, 'peer_range': 250}, [True, True, True, 0, 0, 4]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 4, 'last': 3, 'scroll': 100, 'source_range': 100, 'peer_range': 250}, [True, True, True, 250, 250, 4])], 2: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 8, 'last': 6, 'scroll': 80, 'source_range': 200, 'peer_range': 500}, [True, True, True, 200, 200, 8]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 8, 'last': 6, 'scroll': 80, 'source_range': 200, 'peer_range': 500}, [False, True, True, 200, 200, 8]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 8, 'last': 6, 'scroll': 80, 'source_range': 200, 'peer_range': 500}, [True, False, True, 200, 200, 8]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 6, 'last': 6, 'scroll': 80, 'source_range': 200, 'peer_range': 500}, [True, True, False, 200, 200, 6]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 8, 'last': 6, 'scroll': 0, 'source_range': 200, 'peer_range': 500}, [True, True, True, 0, 0, 8]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 8, 'last': 6, 'scroll': 200, 'source_range': 200, 'peer_range': 500}, [True, True, True, 500, 500, 8])], 3: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 9, 'scroll': 120, 'source_range': 300, 'peer_range': 750}, [True, True, True, 300, 300, 12]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 9, 'scroll': 120, 'source_range': 300, 'peer_range': 750}, [False, True, True, 300, 300, 12]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 12, 'last': 9, 'scroll': 120, 'source_range': 300, 'peer_range': 750}, [True, False, True, 300, 300, 12]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 9, 'last': 9, 'scroll': 120, 'source_range': 300, 'peer_range': 750}, [True, True, False, 300, 300, 9]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 9, 'scroll': 0, 'source_range': 300, 'peer_range': 750}, [True, True, True, 0, 0, 12]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 9, 'scroll': 300, 'source_range': 300, 'peer_range': 750}, [True, True, True, 750, 750, 12])], 4: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 16, 'last': 12, 'scroll': 160, 'source_range': 400, 'peer_range': 1000}, [True, True, True, 400, 400, 16]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 16, 'last': 12, 'scroll': 160, 'source_range': 400, 'peer_range': 1000}, [False, True, True, 400, 400, 16]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 16, 'last': 12, 'scroll': 160, 'source_range': 400, 'peer_range': 1000}, [True, False, True, 400, 400, 16]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 12, 'last': 12, 'scroll': 160, 'source_range': 400, 'peer_range': 1000}, [True, True, False, 400, 400, 12]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 16, 'last': 12, 'scroll': 0, 'source_range': 400, 'peer_range': 1000}, [True, True, True, 0, 0, 16]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 16, 'last': 12, 'scroll': 400, 'source_range': 400, 'peer_range': 1000}, [True, True, True, 1000, 1000, 16])], 5: [({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 20, 'last': 15, 'scroll': 200, 'source_range': 500, 'peer_range': 1250}, [True, True, True, 500, 500, 20]), ({'source': 'a', 'event_view': 'b', 'doc': 'd', 'peer_doc': 'd', 'token': 20, 'last': 15, 'scroll': 200, 'source_range': 500, 'peer_range': 1250}, [False, True, True, 500, 500, 20]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'e', 'token': 20, 'last': 15, 'scroll': 200, 'source_range': 500, 'peer_range': 1250}, [True, False, True, 500, 500, 20]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 15, 'last': 15, 'scroll': 200, 'source_range': 500, 'peer_range': 1250}, [True, True, False, 500, 500, 15]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 20, 'last': 15, 'scroll': 0, 'source_range': 500, 'peer_range': 1250}, [True, True, True, 0, 0, 20]), ({'source': 'a', 'event_view': 'a', 'doc': 'd', 'peer_doc': 'd', 'token': 20, 'last': 15, 'scroll': 500, 'source_range': 500, 'peer_range': 1250}, [True, True, True, 1250, 1250, 20])]}
for i, (inputs, expected) in enumerate(fixtures[N]):
    check("workspace regression "+str(i), solve(inputs), 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 fixture	Actual	Expected	Outcome
workspace regression 0	`[True, True, True, 100, 100, 4]`	`[True, True, True, 100, 100, 4]`	Passed
workspace regression 1	`[False, True, True, 100, 100, 4]`	`[False, True, True, 100, 100, 4]`	Passed
workspace regression 2	`[True, False, True, 100, 100, 4]`	`[True, False, True, 100, 100, 4]`	Passed
workspace regression 3	`[True, True, False, 100, 100, 3]`	`[True, True, False, 100, 100, 3]`	Passed
workspace regression 4	`[True, True, True, 0, 0, 4]`	`[True, True, True, 0, 0, 4]`	Passed
workspace regression 5	`[True, True, True, 250, 250, 4]`	`[True, True, True, 250, 250, 4]`	Passed

SHA-256 / 8b7c65341074705a361da484f48e02a22dbd87888632c6f8e0061a3a6d96df15

Verification & scope

Finite stipulated workspace snapshots only. Independent result fields describe observable obligations, not a full UI runtime. 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 2026-09-29T14:42:45.587720+00:00.

Case digest / 67e2044e8113c4f6714237f1edcfca50496d9352e75b90ef631d45606e1275fa