FAILURE MAP
← Case archive

FA-37976 / Table interactions / Open access

Table column auto-fit measurement: widest cell selection · case 01

The table widest cell selection result violates the stipulated table column auto-fit measurement contract.

Verified by executionVariant 1 · 7 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The widest cell selection decision uses 'min(widths,default=0)' instead of 'max(widths,default=0)'.

THE FAILURE

The widest cell selection decision uses 'min(widths,default=0)' instead of 'max(widths,default=0)'.

Unsuccessful approach: The attempted repair 'sum(widths)//len(widths) if widths else 0' still loses a required part of the table contract.

Case contract

Auto-fit measures only this column’s visible measured cells, includes indentation and cell icons, optionally measures header text plus both controls, takes the widest content, adds two-sided padding and reserved icons, clamps bounds, and reports changes in either direction.

Why this case matters

An offline table UI model isolates table column auto-fit measurement, including adversarial row/column relationships.

1 / The failure

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

N = 1
observations = []
def solve(column, cells, header, padding, minimum, maximum, include_header, icons, current):
    eligible=[c for c in cells if c['column']==column and not c.get('hidden') and c.get('measured',True)]
    widths=[c['text_width']+c.get('indent',0)+c.get('icon_width',0) for c in eligible]
    if include_header: widths.append(header['text_width']+header.get('sort_width',0)+header.get('menu_width',0))
    content=min(widths,default=0)
    result=max(minimum,min(maximum,content+2*padding+icons))
    return {'width':result,'changed':result!=current,'samples':len(eligible),'header_used':include_header,'clipped':content+2*padding+icons>maximum}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
if N == 1:
    check('varied cell decorations', solve('amount', [{'column':'amount','text_width':1+8,'indent':3,'icon_width':4},{'column':'amount','text_width':7},{'column':'other','text_width':90}], {'text_width':5,'sort_width':3,'menu_width':2}, 2, 1, 100, True, 1, 30), {'width': 21, 'changed': True, 'samples': 2, 'header_used': True, 'clipped': False})
    check('hidden and unmeasured', solve('a', [{'column':'a','text_width':90,'hidden':True},{'column':'a','text_width':80,'measured':False},{'column':'a','text_width':4,'offscreen':True}], {'text_width':2}, 1, 1, 100, False, 0, 6), {'width': 6, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('header wider', solve('a', [{'column':'a','text_width':2}], {'text_width':8,'sort_width':3,'menu_width':2}, 1, 1, 100, True, 0, 1), {'width': 15, 'changed': True, 'samples': 1, 'header_used': True, 'clipped': False})
    check('header excluded', solve('a', [{'column':'a','text_width':2}], {'text_width':30}, 1, 1, 100, False, 0, 4), {'width': 4, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('empty with header', solve('a', [], {'text_width':10}, 2, 1, 100, True, 0, 1), {'width': 14, 'changed': True, 'samples': 0, 'header_used': True, 'clipped': False})
    check('clipped sample', solve('a', [{'column':'a','text_width':50}], {'text_width':2}, 2, 5, 20, False, 1, 20), {'width': 20, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': True})
    check('empty without header', solve('a', [], {'text_width':10}, 0, 5, 20, False, 0, 5), {'width': 5, 'changed': False, 'samples': 0, 'header_used': False, 'clipped': False})

if N == 2:
    check('varied cell decorations', solve('amount', [{'column':'amount','text_width':2+8,'indent':3,'icon_width':4},{'column':'amount','text_width':7},{'column':'other','text_width':90}], {'text_width':5,'sort_width':3,'menu_width':2}, 2, 1, 100, True, 1, 30), {'width': 22, 'changed': True, 'samples': 2, 'header_used': True, 'clipped': False})
    check('hidden and unmeasured', solve('a', [{'column':'a','text_width':90,'hidden':True},{'column':'a','text_width':80,'measured':False},{'column':'a','text_width':4,'offscreen':True}], {'text_width':2}, 1, 1, 100, False, 0, 6), {'width': 6, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('header wider', solve('a', [{'column':'a','text_width':2}], {'text_width':8,'sort_width':3,'menu_width':2}, 1, 1, 100, True, 0, 1), {'width': 15, 'changed': True, 'samples': 1, 'header_used': True, 'clipped': False})
    check('header excluded', solve('a', [{'column':'a','text_width':2}], {'text_width':30}, 1, 1, 100, False, 0, 4), {'width': 4, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('empty with header', solve('a', [], {'text_width':10}, 2, 1, 100, True, 0, 1), {'width': 14, 'changed': True, 'samples': 0, 'header_used': True, 'clipped': False})
    check('clipped sample', solve('a', [{'column':'a','text_width':50}], {'text_width':2}, 2, 5, 20, False, 1, 20), {'width': 20, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': True})
    check('empty without header', solve('a', [], {'text_width':10}, 0, 5, 20, False, 0, 5), {'width': 5, 'changed': False, 'samples': 0, 'header_used': False, 'clipped': False})

if N == 3:
    check('varied cell decorations', solve('amount', [{'column':'amount','text_width':3+8,'indent':3,'icon_width':4},{'column':'amount','text_width':7},{'column':'other','text_width':90}], {'text_width':5,'sort_width':3,'menu_width':2}, 2, 1, 100, True, 1, 30), {'width': 23, 'changed': True, 'samples': 2, 'header_used': True, 'clipped': False})
    check('hidden and unmeasured', solve('a', [{'column':'a','text_width':90,'hidden':True},{'column':'a','text_width':80,'measured':False},{'column':'a','text_width':4,'offscreen':True}], {'text_width':2}, 1, 1, 100, False, 0, 6), {'width': 6, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('header wider', solve('a', [{'column':'a','text_width':2}], {'text_width':8,'sort_width':3,'menu_width':2}, 1, 1, 100, True, 0, 1), {'width': 15, 'changed': True, 'samples': 1, 'header_used': True, 'clipped': False})
    check('header excluded', solve('a', [{'column':'a','text_width':2}], {'text_width':30}, 1, 1, 100, False, 0, 4), {'width': 4, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('empty with header', solve('a', [], {'text_width':10}, 2, 1, 100, True, 0, 1), {'width': 14, 'changed': True, 'samples': 0, 'header_used': True, 'clipped': False})
    check('clipped sample', solve('a', [{'column':'a','text_width':50}], {'text_width':2}, 2, 5, 20, False, 1, 20), {'width': 20, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': True})
    check('empty without header', solve('a', [], {'text_width':10}, 0, 5, 20, False, 0, 5), {'width': 5, 'changed': False, 'samples': 0, 'header_used': False, 'clipped': False})

if N == 4:
    check('varied cell decorations', solve('amount', [{'column':'amount','text_width':4+8,'indent':3,'icon_width':4},{'column':'amount','text_width':7},{'column':'other','text_width':90}], {'text_width':5,'sort_width':3,'menu_width':2}, 2, 1, 100, True, 1, 30), {'width': 24, 'changed': True, 'samples': 2, 'header_used': True, 'clipped': False})
    check('hidden and unmeasured', solve('a', [{'column':'a','text_width':90,'hidden':True},{'column':'a','text_width':80,'measured':False},{'column':'a','text_width':4,'offscreen':True}], {'text_width':2}, 1, 1, 100, False, 0, 6), {'width': 6, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('header wider', solve('a', [{'column':'a','text_width':2}], {'text_width':8,'sort_width':3,'menu_width':2}, 1, 1, 100, True, 0, 1), {'width': 15, 'changed': True, 'samples': 1, 'header_used': True, 'clipped': False})
    check('header excluded', solve('a', [{'column':'a','text_width':2}], {'text_width':30}, 1, 1, 100, False, 0, 4), {'width': 4, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('empty with header', solve('a', [], {'text_width':10}, 2, 1, 100, True, 0, 1), {'width': 14, 'changed': True, 'samples': 0, 'header_used': True, 'clipped': False})
    check('clipped sample', solve('a', [{'column':'a','text_width':50}], {'text_width':2}, 2, 5, 20, False, 1, 20), {'width': 20, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': True})
    check('empty without header', solve('a', [], {'text_width':10}, 0, 5, 20, False, 0, 5), {'width': 5, 'changed': False, 'samples': 0, 'header_used': False, 'clipped': False})

if N == 5:
    check('varied cell decorations', solve('amount', [{'column':'amount','text_width':5+8,'indent':3,'icon_width':4},{'column':'amount','text_width':7},{'column':'other','text_width':90}], {'text_width':5,'sort_width':3,'menu_width':2}, 2, 1, 100, True, 1, 30), {'width': 25, 'changed': True, 'samples': 2, 'header_used': True, 'clipped': False})
    check('hidden and unmeasured', solve('a', [{'column':'a','text_width':90,'hidden':True},{'column':'a','text_width':80,'measured':False},{'column':'a','text_width':4,'offscreen':True}], {'text_width':2}, 1, 1, 100, False, 0, 6), {'width': 6, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('header wider', solve('a', [{'column':'a','text_width':2}], {'text_width':8,'sort_width':3,'menu_width':2}, 1, 1, 100, True, 0, 1), {'width': 15, 'changed': True, 'samples': 1, 'header_used': True, 'clipped': False})
    check('header excluded', solve('a', [{'column':'a','text_width':2}], {'text_width':30}, 1, 1, 100, False, 0, 4), {'width': 4, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('empty with header', solve('a', [], {'text_width':10}, 2, 1, 100, True, 0, 1), {'width': 14, 'changed': True, 'samples': 0, 'header_used': True, 'clipped': False})
    check('clipped sample', solve('a', [{'column':'a','text_width':50}], {'text_width':2}, 2, 5, 20, False, 1, 20), {'width': 20, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': True})
    check('empty without header', solve('a', [], {'text_width':10}, 0, 5, 20, False, 0, 5), {'width': 5, 'changed': False, 'samples': 0, 'header_used': False, 'clipped': False})

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
varied cell decorations{'changed': True, 'clipped': False, 'header_used': True, 'samples': 2, 'width': 12}{'changed': True, 'clipped': False, 'header_used': True, 'samples': 2, 'width': 21}Failed
hidden and unmeasured{'changed': False, 'clipped': False, 'header_used': False, 'samples': 1, 'width': 6}{'changed': False, 'clipped': False, 'header_used': False, 'samples': 1, 'width': 6}Passed
header wider{'changed': True, 'clipped': False, 'header_used': True, 'samples': 1, 'width': 4}{'changed': True, 'clipped': False, 'header_used': True, 'samples': 1, 'width': 15}Failed
header excluded{'changed': False, 'clipped': False, 'header_used': False, 'samples': 1, 'width': 4}{'changed': False, 'clipped': False, 'header_used': False, 'samples': 1, 'width': 4}Passed
empty with header{'changed': True, 'clipped': False, 'header_used': True, 'samples': 0, 'width': 14}{'changed': True, 'clipped': False, 'header_used': True, 'samples': 0, 'width': 14}Passed
clipped sample{'changed': False, 'clipped': True, 'header_used': False, 'samples': 1, 'width': 20}{'changed': False, 'clipped': True, 'header_used': False, 'samples': 1, 'width': 20}Passed
empty without header{'changed': False, 'clipped': False, 'header_used': False, 'samples': 0, 'width': 5}{'changed': False, 'clipped': False, 'header_used': False, 'samples': 0, 'width': 5}Passed

SHA-256 / 6fc444e19e55d7544e89658479194f26fa361d6b55579dc6bed26a9e4694813a

2 / The unsuccessful fix

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

N = 1
observations = []
def solve(column, cells, header, padding, minimum, maximum, include_header, icons, current):
    eligible=[c for c in cells if c['column']==column and not c.get('hidden') and c.get('measured',True)]
    widths=[c['text_width']+c.get('indent',0)+c.get('icon_width',0) for c in eligible]
    if include_header: widths.append(header['text_width']+header.get('sort_width',0)+header.get('menu_width',0))
    content=sum(widths)//len(widths) if widths else 0
    result=max(minimum,min(maximum,content+2*padding+icons))
    return {'width':result,'changed':result!=current,'samples':len(eligible),'header_used':include_header,'clipped':content+2*padding+icons>maximum}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
if N == 1:
    check('varied cell decorations', solve('amount', [{'column':'amount','text_width':1+8,'indent':3,'icon_width':4},{'column':'amount','text_width':7},{'column':'other','text_width':90}], {'text_width':5,'sort_width':3,'menu_width':2}, 2, 1, 100, True, 1, 30), {'width': 21, 'changed': True, 'samples': 2, 'header_used': True, 'clipped': False})
    check('hidden and unmeasured', solve('a', [{'column':'a','text_width':90,'hidden':True},{'column':'a','text_width':80,'measured':False},{'column':'a','text_width':4,'offscreen':True}], {'text_width':2}, 1, 1, 100, False, 0, 6), {'width': 6, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('header wider', solve('a', [{'column':'a','text_width':2}], {'text_width':8,'sort_width':3,'menu_width':2}, 1, 1, 100, True, 0, 1), {'width': 15, 'changed': True, 'samples': 1, 'header_used': True, 'clipped': False})
    check('header excluded', solve('a', [{'column':'a','text_width':2}], {'text_width':30}, 1, 1, 100, False, 0, 4), {'width': 4, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('empty with header', solve('a', [], {'text_width':10}, 2, 1, 100, True, 0, 1), {'width': 14, 'changed': True, 'samples': 0, 'header_used': True, 'clipped': False})
    check('clipped sample', solve('a', [{'column':'a','text_width':50}], {'text_width':2}, 2, 5, 20, False, 1, 20), {'width': 20, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': True})
    check('empty without header', solve('a', [], {'text_width':10}, 0, 5, 20, False, 0, 5), {'width': 5, 'changed': False, 'samples': 0, 'header_used': False, 'clipped': False})

if N == 2:
    check('varied cell decorations', solve('amount', [{'column':'amount','text_width':2+8,'indent':3,'icon_width':4},{'column':'amount','text_width':7},{'column':'other','text_width':90}], {'text_width':5,'sort_width':3,'menu_width':2}, 2, 1, 100, True, 1, 30), {'width': 22, 'changed': True, 'samples': 2, 'header_used': True, 'clipped': False})
    check('hidden and unmeasured', solve('a', [{'column':'a','text_width':90,'hidden':True},{'column':'a','text_width':80,'measured':False},{'column':'a','text_width':4,'offscreen':True}], {'text_width':2}, 1, 1, 100, False, 0, 6), {'width': 6, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('header wider', solve('a', [{'column':'a','text_width':2}], {'text_width':8,'sort_width':3,'menu_width':2}, 1, 1, 100, True, 0, 1), {'width': 15, 'changed': True, 'samples': 1, 'header_used': True, 'clipped': False})
    check('header excluded', solve('a', [{'column':'a','text_width':2}], {'text_width':30}, 1, 1, 100, False, 0, 4), {'width': 4, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('empty with header', solve('a', [], {'text_width':10}, 2, 1, 100, True, 0, 1), {'width': 14, 'changed': True, 'samples': 0, 'header_used': True, 'clipped': False})
    check('clipped sample', solve('a', [{'column':'a','text_width':50}], {'text_width':2}, 2, 5, 20, False, 1, 20), {'width': 20, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': True})
    check('empty without header', solve('a', [], {'text_width':10}, 0, 5, 20, False, 0, 5), {'width': 5, 'changed': False, 'samples': 0, 'header_used': False, 'clipped': False})

if N == 3:
    check('varied cell decorations', solve('amount', [{'column':'amount','text_width':3+8,'indent':3,'icon_width':4},{'column':'amount','text_width':7},{'column':'other','text_width':90}], {'text_width':5,'sort_width':3,'menu_width':2}, 2, 1, 100, True, 1, 30), {'width': 23, 'changed': True, 'samples': 2, 'header_used': True, 'clipped': False})
    check('hidden and unmeasured', solve('a', [{'column':'a','text_width':90,'hidden':True},{'column':'a','text_width':80,'measured':False},{'column':'a','text_width':4,'offscreen':True}], {'text_width':2}, 1, 1, 100, False, 0, 6), {'width': 6, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('header wider', solve('a', [{'column':'a','text_width':2}], {'text_width':8,'sort_width':3,'menu_width':2}, 1, 1, 100, True, 0, 1), {'width': 15, 'changed': True, 'samples': 1, 'header_used': True, 'clipped': False})
    check('header excluded', solve('a', [{'column':'a','text_width':2}], {'text_width':30}, 1, 1, 100, False, 0, 4), {'width': 4, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('empty with header', solve('a', [], {'text_width':10}, 2, 1, 100, True, 0, 1), {'width': 14, 'changed': True, 'samples': 0, 'header_used': True, 'clipped': False})
    check('clipped sample', solve('a', [{'column':'a','text_width':50}], {'text_width':2}, 2, 5, 20, False, 1, 20), {'width': 20, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': True})
    check('empty without header', solve('a', [], {'text_width':10}, 0, 5, 20, False, 0, 5), {'width': 5, 'changed': False, 'samples': 0, 'header_used': False, 'clipped': False})

if N == 4:
    check('varied cell decorations', solve('amount', [{'column':'amount','text_width':4+8,'indent':3,'icon_width':4},{'column':'amount','text_width':7},{'column':'other','text_width':90}], {'text_width':5,'sort_width':3,'menu_width':2}, 2, 1, 100, True, 1, 30), {'width': 24, 'changed': True, 'samples': 2, 'header_used': True, 'clipped': False})
    check('hidden and unmeasured', solve('a', [{'column':'a','text_width':90,'hidden':True},{'column':'a','text_width':80,'measured':False},{'column':'a','text_width':4,'offscreen':True}], {'text_width':2}, 1, 1, 100, False, 0, 6), {'width': 6, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('header wider', solve('a', [{'column':'a','text_width':2}], {'text_width':8,'sort_width':3,'menu_width':2}, 1, 1, 100, True, 0, 1), {'width': 15, 'changed': True, 'samples': 1, 'header_used': True, 'clipped': False})
    check('header excluded', solve('a', [{'column':'a','text_width':2}], {'text_width':30}, 1, 1, 100, False, 0, 4), {'width': 4, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('empty with header', solve('a', [], {'text_width':10}, 2, 1, 100, True, 0, 1), {'width': 14, 'changed': True, 'samples': 0, 'header_used': True, 'clipped': False})
    check('clipped sample', solve('a', [{'column':'a','text_width':50}], {'text_width':2}, 2, 5, 20, False, 1, 20), {'width': 20, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': True})
    check('empty without header', solve('a', [], {'text_width':10}, 0, 5, 20, False, 0, 5), {'width': 5, 'changed': False, 'samples': 0, 'header_used': False, 'clipped': False})

if N == 5:
    check('varied cell decorations', solve('amount', [{'column':'amount','text_width':5+8,'indent':3,'icon_width':4},{'column':'amount','text_width':7},{'column':'other','text_width':90}], {'text_width':5,'sort_width':3,'menu_width':2}, 2, 1, 100, True, 1, 30), {'width': 25, 'changed': True, 'samples': 2, 'header_used': True, 'clipped': False})
    check('hidden and unmeasured', solve('a', [{'column':'a','text_width':90,'hidden':True},{'column':'a','text_width':80,'measured':False},{'column':'a','text_width':4,'offscreen':True}], {'text_width':2}, 1, 1, 100, False, 0, 6), {'width': 6, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('header wider', solve('a', [{'column':'a','text_width':2}], {'text_width':8,'sort_width':3,'menu_width':2}, 1, 1, 100, True, 0, 1), {'width': 15, 'changed': True, 'samples': 1, 'header_used': True, 'clipped': False})
    check('header excluded', solve('a', [{'column':'a','text_width':2}], {'text_width':30}, 1, 1, 100, False, 0, 4), {'width': 4, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': False})
    check('empty with header', solve('a', [], {'text_width':10}, 2, 1, 100, True, 0, 1), {'width': 14, 'changed': True, 'samples': 0, 'header_used': True, 'clipped': False})
    check('clipped sample', solve('a', [{'column':'a','text_width':50}], {'text_width':2}, 2, 5, 20, False, 1, 20), {'width': 20, 'changed': False, 'samples': 1, 'header_used': False, 'clipped': True})
    check('empty without header', solve('a', [], {'text_width':10}, 0, 5, 20, False, 0, 5), {'width': 5, 'changed': False, 'samples': 0, 'header_used': False, 'clipped': False})

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
varied cell decorations{'changed': True, 'clipped': False, 'header_used': True, 'samples': 2, 'width': 16}{'changed': True, 'clipped': False, 'header_used': True, 'samples': 2, 'width': 21}Failed
hidden and unmeasured{'changed': False, 'clipped': False, 'header_used': False, 'samples': 1, 'width': 6}{'changed': False, 'clipped': False, 'header_used': False, 'samples': 1, 'width': 6}Passed
header wider{'changed': True, 'clipped': False, 'header_used': True, 'samples': 1, 'width': 9}{'changed': True, 'clipped': False, 'header_used': True, 'samples': 1, 'width': 15}Failed
header excluded{'changed': False, 'clipped': False, 'header_used': False, 'samples': 1, 'width': 4}{'changed': False, 'clipped': False, 'header_used': False, 'samples': 1, 'width': 4}Passed
empty with header{'changed': True, 'clipped': False, 'header_used': True, 'samples': 0, 'width': 14}{'changed': True, 'clipped': False, 'header_used': True, 'samples': 0, 'width': 14}Passed
clipped sample{'changed': False, 'clipped': True, 'header_used': False, 'samples': 1, 'width': 20}{'changed': False, 'clipped': True, 'header_used': False, 'samples': 1, 'width': 20}Passed
empty without header{'changed': False, 'clipped': False, 'header_used': False, 'samples': 0, 'width': 5}{'changed': False, 'clipped': False, 'header_used': False, 'samples': 0, 'width': 5}Passed

SHA-256 / 793a9493f18284fd9d09d6c9fc510233eb8f24f898762cbf7c41db49602d6716

HELD IN THE MEMBER ARCHIVE

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

This mechanism has 7 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.

Member access is invitation-based. Sign in with your invited account to inspect the repair.

Sign in to the archive ↗

Verification & scope

Measurements, padding, and reserved decorations are nonnegative finite widths; minimum does not exceed maximum. Deterministic offline table UI model; no browser, DOM, framework, or standards 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 2026-09-29T14:43:06.627587+00:00.

Case digest / 52a4d648ecf6025a823a067b39f2e807f40b4e6356d97e21ca3e6e0d1d9ec727