FA-78091 / Subtitle cue timing / Open access

Adjacent duplicate cue merging: text normalization · case 01

Repeated lines that differ only by a trailing space are shown as separate flickering cues.

Verified by executionVariant 1 · 9 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Texts are compared raw, so incidental whitespace prevents merging.

VERIFIED REPAIR

Collapse whitespace runs and trim before comparing.

Unsuccessful approach: Trimming alone still treats doubled inner spaces as different text.

Case contract

Walk cues [start,end,text] in order. Text is normalized by collapsing whitespace runs to single spaces and trimming. A cue whose normalized text is nonempty and equal to the previous output cue text, starting at most max_gap after that cue ends (overlaps included), is merged: the output end becomes the later of the two ends. Output cues carry normalized text.

Why this case matters

Subtitle timing defects shift, hide or overlap captions that viewers depend on for comprehension and accessibility.

1 / The failure

Exit 1

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

N = 1
observations = []
def solve(cues, max_gap):
    out=[]
    for s,e,t in cues:
        norm=t
        if out and norm and out[-1][2]==norm and s-out[-1][1]<=max_gap:
            out[-1][1]=max(out[-1][1],e)
            continue
        out.append([s,e,norm])
    return out
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: text normalization', [[[0, 100, ' '], [100, 200, ' ']], 0], [[0, 100, ''], [100, 200, '']]), ('regression variant: text normalization', [[[0, 1000, 'Yes  sir'], [1000, 1100, ''], [800, 900, 'Yes sir']], 100], [[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]), ('partial repair probe: text normalization', [[[0, 500, 'Yes '], [600, 1600, ' Yes'], [1300, 1800, 'Yes '], [1900, 2400, 'Yes '], [2100, 2200, 'Yes  sir']], 100], [[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]), ('partial repair variant: text normalization', [[[500, 1500, ' Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes '], [2501, 3001, 'Go\nnow']], 100], [[500, 1500, 'Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes'], [2501, 3001, 'Go now']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('normal control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[500, 1000, ''], [1000, 1100, 'Go now']], 100], [[500, 1000, ''], [1000, 1100, 'Go now']]), ('normal control', [[[500, 1500, ''], [1200, 1300, 'Yes']], 0], [[500, 1500, ''], [1200, 1300, 'Yes']])], [('regression: text normalization', [[[0, 100, 'Go\nnow'], [100, 1100, 'Yes'], [1200, 1700, 'Yes'], [1799, 1899, 'No'], [1599, 2099, 'Go\nnow']], 100], [[0, 100, 'Go now'], [100, 1700, 'Yes'], [1799, 1899, 'No'], [1599, 2099, 'Go now']]), ('regression variant: text normalization', [[[0, 500, '  '], [499, 1499, ''], [1500, 1600, 'Yes'], [1599, 2599, 'Yes sir'], [1899, 2399, 'No']], 0], [[0, 500, ''], [499, 1499, ''], [1500, 1600, 'Yes'], [1599, 2599, 'Yes sir'], [1899, 2399, 'No']]), ('partial repair probe: text normalization', [[[0, 1000, 'Yes  sir'], [1000, 1100, ''], [800, 900, 'Yes sir']], 100], [[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]), ('partial repair variant: text normalization', [[[0, 100, 'Go\nnow'], [-200, 800, '  '], [800, 1300, 'Yes sir'], [1301, 1401, ''], [1801, 1901, 'Yes ']], 0], [[0, 100, 'Go now'], [-200, 800, ''], [800, 1300, 'Yes sir'], [1301, 1401, ''], [1801, 1901, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[0, 1000, 'Yes'], [1041, 2041, ''], [2041, 2541, 'No']], 40], [[0, 1000, 'Yes'], [1041, 2041, ''], [2041, 2541, 'No']]), ('normal control', [[[500, 1500, 'No']], 40], [[500, 1500, 'No']]), ('normal control', [[[500, 1500, '']], 0], [[500, 1500, '']])], [('regression: text normalization', [[[500, 1000, 'No'], [1101, 1601, 'Yes  sir']], 100], [[500, 1000, 'No'], [1101, 1601, 'Yes sir']]), ('regression variant: text normalization', [[[500, 600, 'Yes  sir'], [699, 1199, 'Go\nnow'], [1299, 2299, 'Yes '], [1999, 2999, 'Yes  sir']], 100], [[500, 600, 'Yes sir'], [699, 1199, 'Go now'], [1299, 2299, 'Yes'], [1999, 2999, 'Yes sir']]), ('partial repair probe: text normalization', [[[500, 600, 'Go\nnow'], [1000, 2000, 'Yes sir']], 100], [[500, 600, 'Go now'], [1000, 2000, 'Yes sir']]), ('partial repair variant: text normalization', [[[0, 500, 'Go\nnow'], [200, 700, 'Yes sir'], [801, 1801, 'Go\nnow'], [1901, 2401, 'Yes  sir'], [1701, 1801, 'Yes ']], 100], [[0, 500, 'Go now'], [200, 700, 'Yes sir'], [801, 1801, 'Go now'], [1901, 2401, 'Yes sir'], [1701, 1801, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('normal control', [[[0, 500, ''], [600, 700, '']], 100], [[0, 500, ''], [600, 700, '']]), ('normal control', [[[0, 1000, ''], [700, 1200, 'No']], 40], [[0, 1000, ''], [700, 1200, 'No']]), ('normal control', [[[0, 500, 'Yes']], 100], [[0, 500, 'Yes']])], [('regression: text normalization', [[[0, 500, 'Yes '], [600, 1600, ' Yes'], [1300, 1800, 'Yes '], [1900, 2400, 'Yes '], [2100, 2200, 'Yes  sir']], 100], [[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]), ('regression variant: text normalization', [[[500, 1000, '  '], [1400, 2400, 'Yes sir'], [2400, 2500, 'Yes '], [2900, 3000, 'Yes sir'], [3000, 3100, 'Yes'], [3100, 3600, 'No']], 0], [[500, 1000, ''], [1400, 2400, 'Yes sir'], [2400, 2500, 'Yes'], [2900, 3000, 'Yes sir'], [3000, 3100, 'Yes'], [3100, 3600, 'No']]), ('partial repair probe: text normalization', [[[500, 600, 'Go\nnow'], [1000, 2000, 'Yes sir']], 100], [[500, 600, 'Go now'], [1000, 2000, 'Yes sir']]), ('partial repair variant: text normalization', [[[0, 1000, 'Yes'], [1041, 1141, 'Yes sir'], [1541, 2041, 'Yes  sir'], [2082, 3082, 'Yes']], 40], [[0, 1000, 'Yes'], [1041, 1141, 'Yes sir'], [1541, 2041, 'Yes sir'], [2082, 3082, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('normal control', [[[0, 100, 'No'], [199, 299, 'No']], 100], [[0, 299, 'No']]), ('normal control', [[[500, 1500, 'Yes']], 100], [[500, 1500, 'Yes']]), ('normal control', [[[0, 100, 'Yes sir'], [500, 1500, 'No'], [1599, 2099, ''], [1799, 2299, 'Yes sir'], [2400, 2500, 'Yes sir'], [1800, 2800, 'Yes sir']], 100], [[0, 100, 'Yes sir'], [500, 1500, 'No'], [1599, 2099, ''], [1799, 2299, 'Yes sir'], [2400, 2800, 'Yes sir']])], [('regression: text normalization', [[[500, 1000, ' Yes'], [300, 400, ''], [400, 1400, 'Yes sir'], [1401, 1501, 'No'], [801, 1301, 'Yes sir']], 0], [[500, 1000, 'Yes'], [300, 400, ''], [400, 1400, 'Yes sir'], [1401, 1501, 'No'], [801, 1301, 'Yes sir']]), ('regression variant: text normalization', [[[500, 1000, 'No'], [1099, 1599, 'Go now'], [1700, 1800, '  '], [1899, 1999, '']], 100], [[500, 1000, 'No'], [1099, 1599, 'Go now'], [1700, 1800, ''], [1899, 1999, '']]), ('partial repair probe: text normalization', [[[0, 500, 'Yes  sir'], [-200, -100, '  '], [1, 101, 'Go\nnow'], [501, 601, 'Yes'], [700, 1700, 'Go now']], 100], [[0, 500, 'Yes sir'], [-200, -100, ''], [1, 101, 'Go now'], [501, 601, 'Yes'], [700, 1700, 'Go now']]), ('partial repair variant: text normalization', [[[500, 1500, 'Go now'], [1900, 2400, 'Yes '], [2800, 3800, 'No'], [3800, 4800, 'Yes sir'], [4801, 5801, 'Yes  sir'], [5501, 5601, ' Yes']], 0], [[500, 1500, 'Go now'], [1900, 2400, 'Yes'], [2800, 3800, 'No'], [3800, 4800, 'Yes sir'], [4801, 5801, 'Yes sir'], [5501, 5601, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[500, 600, 'Go now']], 0], [[500, 600, 'Go now']]), ('normal control', [[[500, 1000, 'Go now']], 40], [[500, 1000, 'Go now']]), ('normal control', [[[0, 100, 'Yes']], 100], [[0, 100, 'Yes']])]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(*args), 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
regression: text normalization	`[[0, 200, ' ']]`	`[[0, 100, ''], [100, 200, '']]`	Failed
regression variant: text normalization	`[[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]`	`[[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]`	Failed
partial repair probe: text normalization	`[[0, 500, 'Yes '], [600, 1600, ' Yes'], [1300, 2400, 'Yes '], [2100, 2200, 'Yes sir']]`	`[[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]`	Failed
partial repair variant: text normalization	`[[500, 1500, ' Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes '], [2501, 3001, 'Go\nnow']]`	`[[500, 1500, 'Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes'], [2501, 3001, 'Go now']]`	Failed
boundary control	`[[0, 900, 'Yes']]`	`[[0, 900, 'Yes']]`	Passed
boundary control	`[[0, 500, 'Yes']]`	`[[0, 500, 'Yes']]`	Passed
normal control	`[[0, 100, 'A'], [150, 200, 'A']]`	`[[0, 100, 'A'], [150, 200, 'A']]`	Passed
normal control	`[[500, 1000, ''], [1000, 1100, 'Go now']]`	`[[500, 1000, ''], [1000, 1100, 'Go now']]`	Passed
normal control	`[[500, 1500, ''], [1200, 1300, 'Yes']]`	`[[500, 1500, ''], [1200, 1300, 'Yes']]`	Passed

SHA-256 / 96646f3b53980440b04aef47fb4d2b7584008b855b30010286adf322ff6ebfb8

2 / The unsuccessful fix

Exit 1

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

N = 1
observations = []
def solve(cues, max_gap):
    out=[]
    for s,e,t in cues:
        norm=t.strip()
        if out and norm and out[-1][2]==norm and s-out[-1][1]<=max_gap:
            out[-1][1]=max(out[-1][1],e)
            continue
        out.append([s,e,norm])
    return out
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: text normalization', [[[0, 100, ' '], [100, 200, ' ']], 0], [[0, 100, ''], [100, 200, '']]), ('regression variant: text normalization', [[[0, 1000, 'Yes  sir'], [1000, 1100, ''], [800, 900, 'Yes sir']], 100], [[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]), ('partial repair probe: text normalization', [[[0, 500, 'Yes '], [600, 1600, ' Yes'], [1300, 1800, 'Yes '], [1900, 2400, 'Yes '], [2100, 2200, 'Yes  sir']], 100], [[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]), ('partial repair variant: text normalization', [[[500, 1500, ' Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes '], [2501, 3001, 'Go\nnow']], 100], [[500, 1500, 'Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes'], [2501, 3001, 'Go now']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('normal control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[500, 1000, ''], [1000, 1100, 'Go now']], 100], [[500, 1000, ''], [1000, 1100, 'Go now']]), ('normal control', [[[500, 1500, ''], [1200, 1300, 'Yes']], 0], [[500, 1500, ''], [1200, 1300, 'Yes']])], [('regression: text normalization', [[[0, 100, 'Go\nnow'], [100, 1100, 'Yes'], [1200, 1700, 'Yes'], [1799, 1899, 'No'], [1599, 2099, 'Go\nnow']], 100], [[0, 100, 'Go now'], [100, 1700, 'Yes'], [1799, 1899, 'No'], [1599, 2099, 'Go now']]), ('regression variant: text normalization', [[[0, 500, '  '], [499, 1499, ''], [1500, 1600, 'Yes'], [1599, 2599, 'Yes sir'], [1899, 2399, 'No']], 0], [[0, 500, ''], [499, 1499, ''], [1500, 1600, 'Yes'], [1599, 2599, 'Yes sir'], [1899, 2399, 'No']]), ('partial repair probe: text normalization', [[[0, 1000, 'Yes  sir'], [1000, 1100, ''], [800, 900, 'Yes sir']], 100], [[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]), ('partial repair variant: text normalization', [[[0, 100, 'Go\nnow'], [-200, 800, '  '], [800, 1300, 'Yes sir'], [1301, 1401, ''], [1801, 1901, 'Yes ']], 0], [[0, 100, 'Go now'], [-200, 800, ''], [800, 1300, 'Yes sir'], [1301, 1401, ''], [1801, 1901, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[0, 1000, 'Yes'], [1041, 2041, ''], [2041, 2541, 'No']], 40], [[0, 1000, 'Yes'], [1041, 2041, ''], [2041, 2541, 'No']]), ('normal control', [[[500, 1500, 'No']], 40], [[500, 1500, 'No']]), ('normal control', [[[500, 1500, '']], 0], [[500, 1500, '']])], [('regression: text normalization', [[[500, 1000, 'No'], [1101, 1601, 'Yes  sir']], 100], [[500, 1000, 'No'], [1101, 1601, 'Yes sir']]), ('regression variant: text normalization', [[[500, 600, 'Yes  sir'], [699, 1199, 'Go\nnow'], [1299, 2299, 'Yes '], [1999, 2999, 'Yes  sir']], 100], [[500, 600, 'Yes sir'], [699, 1199, 'Go now'], [1299, 2299, 'Yes'], [1999, 2999, 'Yes sir']]), ('partial repair probe: text normalization', [[[500, 600, 'Go\nnow'], [1000, 2000, 'Yes sir']], 100], [[500, 600, 'Go now'], [1000, 2000, 'Yes sir']]), ('partial repair variant: text normalization', [[[0, 500, 'Go\nnow'], [200, 700, 'Yes sir'], [801, 1801, 'Go\nnow'], [1901, 2401, 'Yes  sir'], [1701, 1801, 'Yes ']], 100], [[0, 500, 'Go now'], [200, 700, 'Yes sir'], [801, 1801, 'Go now'], [1901, 2401, 'Yes sir'], [1701, 1801, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('normal control', [[[0, 500, ''], [600, 700, '']], 100], [[0, 500, ''], [600, 700, '']]), ('normal control', [[[0, 1000, ''], [700, 1200, 'No']], 40], [[0, 1000, ''], [700, 1200, 'No']]), ('normal control', [[[0, 500, 'Yes']], 100], [[0, 500, 'Yes']])], [('regression: text normalization', [[[0, 500, 'Yes '], [600, 1600, ' Yes'], [1300, 1800, 'Yes '], [1900, 2400, 'Yes '], [2100, 2200, 'Yes  sir']], 100], [[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]), ('regression variant: text normalization', [[[500, 1000, '  '], [1400, 2400, 'Yes sir'], [2400, 2500, 'Yes '], [2900, 3000, 'Yes sir'], [3000, 3100, 'Yes'], [3100, 3600, 'No']], 0], [[500, 1000, ''], [1400, 2400, 'Yes sir'], [2400, 2500, 'Yes'], [2900, 3000, 'Yes sir'], [3000, 3100, 'Yes'], [3100, 3600, 'No']]), ('partial repair probe: text normalization', [[[500, 600, 'Go\nnow'], [1000, 2000, 'Yes sir']], 100], [[500, 600, 'Go now'], [1000, 2000, 'Yes sir']]), ('partial repair variant: text normalization', [[[0, 1000, 'Yes'], [1041, 1141, 'Yes sir'], [1541, 2041, 'Yes  sir'], [2082, 3082, 'Yes']], 40], [[0, 1000, 'Yes'], [1041, 1141, 'Yes sir'], [1541, 2041, 'Yes sir'], [2082, 3082, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('normal control', [[[0, 100, 'No'], [199, 299, 'No']], 100], [[0, 299, 'No']]), ('normal control', [[[500, 1500, 'Yes']], 100], [[500, 1500, 'Yes']]), ('normal control', [[[0, 100, 'Yes sir'], [500, 1500, 'No'], [1599, 2099, ''], [1799, 2299, 'Yes sir'], [2400, 2500, 'Yes sir'], [1800, 2800, 'Yes sir']], 100], [[0, 100, 'Yes sir'], [500, 1500, 'No'], [1599, 2099, ''], [1799, 2299, 'Yes sir'], [2400, 2800, 'Yes sir']])], [('regression: text normalization', [[[500, 1000, ' Yes'], [300, 400, ''], [400, 1400, 'Yes sir'], [1401, 1501, 'No'], [801, 1301, 'Yes sir']], 0], [[500, 1000, 'Yes'], [300, 400, ''], [400, 1400, 'Yes sir'], [1401, 1501, 'No'], [801, 1301, 'Yes sir']]), ('regression variant: text normalization', [[[500, 1000, 'No'], [1099, 1599, 'Go now'], [1700, 1800, '  '], [1899, 1999, '']], 100], [[500, 1000, 'No'], [1099, 1599, 'Go now'], [1700, 1800, ''], [1899, 1999, '']]), ('partial repair probe: text normalization', [[[0, 500, 'Yes  sir'], [-200, -100, '  '], [1, 101, 'Go\nnow'], [501, 601, 'Yes'], [700, 1700, 'Go now']], 100], [[0, 500, 'Yes sir'], [-200, -100, ''], [1, 101, 'Go now'], [501, 601, 'Yes'], [700, 1700, 'Go now']]), ('partial repair variant: text normalization', [[[500, 1500, 'Go now'], [1900, 2400, 'Yes '], [2800, 3800, 'No'], [3800, 4800, 'Yes sir'], [4801, 5801, 'Yes  sir'], [5501, 5601, ' Yes']], 0], [[500, 1500, 'Go now'], [1900, 2400, 'Yes'], [2800, 3800, 'No'], [3800, 4800, 'Yes sir'], [4801, 5801, 'Yes sir'], [5501, 5601, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[500, 600, 'Go now']], 0], [[500, 600, 'Go now']]), ('normal control', [[[500, 1000, 'Go now']], 40], [[500, 1000, 'Go now']]), ('normal control', [[[0, 100, 'Yes']], 100], [[0, 100, 'Yes']])]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(*args), 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
regression: text normalization	`[[0, 100, ''], [100, 200, '']]`	`[[0, 100, ''], [100, 200, '']]`	Passed
regression variant: text normalization	`[[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]`	`[[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]`	Failed
partial repair probe: text normalization	`[[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]`	`[[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]`	Failed
partial repair variant: text normalization	`[[500, 1500, 'Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes'], [2501, 3001, 'Go\nnow']]`	`[[500, 1500, 'Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes'], [2501, 3001, 'Go now']]`	Failed
boundary control	`[[0, 900, 'Yes']]`	`[[0, 900, 'Yes']]`	Passed
boundary control	`[[0, 500, 'Yes']]`	`[[0, 500, 'Yes']]`	Passed
normal control	`[[0, 100, 'A'], [150, 200, 'A']]`	`[[0, 100, 'A'], [150, 200, 'A']]`	Passed
normal control	`[[500, 1000, ''], [1000, 1100, 'Go now']]`	`[[500, 1000, ''], [1000, 1100, 'Go now']]`	Passed
normal control	`[[500, 1500, ''], [1200, 1300, 'Yes']]`	`[[500, 1500, ''], [1200, 1300, 'Yes']]`	Passed

SHA-256 / b444a9dc3f5a0929c10b1cef9dd7ec72e6022676d2145e24288794f50ef470c0

3 / The verified repair

Exit 0

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

N = 1
observations = []
def solve(cues, max_gap):
    out=[]
    for s,e,t in cues:
        norm=' '.join(t.split())
        if out and norm and out[-1][2]==norm and s-out[-1][1]<=max_gap:
            out[-1][1]=max(out[-1][1],e)
            continue
        out.append([s,e,norm])
    return out
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: text normalization', [[[0, 100, ' '], [100, 200, ' ']], 0], [[0, 100, ''], [100, 200, '']]), ('regression variant: text normalization', [[[0, 1000, 'Yes  sir'], [1000, 1100, ''], [800, 900, 'Yes sir']], 100], [[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]), ('partial repair probe: text normalization', [[[0, 500, 'Yes '], [600, 1600, ' Yes'], [1300, 1800, 'Yes '], [1900, 2400, 'Yes '], [2100, 2200, 'Yes  sir']], 100], [[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]), ('partial repair variant: text normalization', [[[500, 1500, ' Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes '], [2501, 3001, 'Go\nnow']], 100], [[500, 1500, 'Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes'], [2501, 3001, 'Go now']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('normal control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[500, 1000, ''], [1000, 1100, 'Go now']], 100], [[500, 1000, ''], [1000, 1100, 'Go now']]), ('normal control', [[[500, 1500, ''], [1200, 1300, 'Yes']], 0], [[500, 1500, ''], [1200, 1300, 'Yes']])], [('regression: text normalization', [[[0, 100, 'Go\nnow'], [100, 1100, 'Yes'], [1200, 1700, 'Yes'], [1799, 1899, 'No'], [1599, 2099, 'Go\nnow']], 100], [[0, 100, 'Go now'], [100, 1700, 'Yes'], [1799, 1899, 'No'], [1599, 2099, 'Go now']]), ('regression variant: text normalization', [[[0, 500, '  '], [499, 1499, ''], [1500, 1600, 'Yes'], [1599, 2599, 'Yes sir'], [1899, 2399, 'No']], 0], [[0, 500, ''], [499, 1499, ''], [1500, 1600, 'Yes'], [1599, 2599, 'Yes sir'], [1899, 2399, 'No']]), ('partial repair probe: text normalization', [[[0, 1000, 'Yes  sir'], [1000, 1100, ''], [800, 900, 'Yes sir']], 100], [[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]), ('partial repair variant: text normalization', [[[0, 100, 'Go\nnow'], [-200, 800, '  '], [800, 1300, 'Yes sir'], [1301, 1401, ''], [1801, 1901, 'Yes ']], 0], [[0, 100, 'Go now'], [-200, 800, ''], [800, 1300, 'Yes sir'], [1301, 1401, ''], [1801, 1901, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[0, 1000, 'Yes'], [1041, 2041, ''], [2041, 2541, 'No']], 40], [[0, 1000, 'Yes'], [1041, 2041, ''], [2041, 2541, 'No']]), ('normal control', [[[500, 1500, 'No']], 40], [[500, 1500, 'No']]), ('normal control', [[[500, 1500, '']], 0], [[500, 1500, '']])], [('regression: text normalization', [[[500, 1000, 'No'], [1101, 1601, 'Yes  sir']], 100], [[500, 1000, 'No'], [1101, 1601, 'Yes sir']]), ('regression variant: text normalization', [[[500, 600, 'Yes  sir'], [699, 1199, 'Go\nnow'], [1299, 2299, 'Yes '], [1999, 2999, 'Yes  sir']], 100], [[500, 600, 'Yes sir'], [699, 1199, 'Go now'], [1299, 2299, 'Yes'], [1999, 2999, 'Yes sir']]), ('partial repair probe: text normalization', [[[500, 600, 'Go\nnow'], [1000, 2000, 'Yes sir']], 100], [[500, 600, 'Go now'], [1000, 2000, 'Yes sir']]), ('partial repair variant: text normalization', [[[0, 500, 'Go\nnow'], [200, 700, 'Yes sir'], [801, 1801, 'Go\nnow'], [1901, 2401, 'Yes  sir'], [1701, 1801, 'Yes ']], 100], [[0, 500, 'Go now'], [200, 700, 'Yes sir'], [801, 1801, 'Go now'], [1901, 2401, 'Yes sir'], [1701, 1801, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('normal control', [[[0, 500, ''], [600, 700, '']], 100], [[0, 500, ''], [600, 700, '']]), ('normal control', [[[0, 1000, ''], [700, 1200, 'No']], 40], [[0, 1000, ''], [700, 1200, 'No']]), ('normal control', [[[0, 500, 'Yes']], 100], [[0, 500, 'Yes']])], [('regression: text normalization', [[[0, 500, 'Yes '], [600, 1600, ' Yes'], [1300, 1800, 'Yes '], [1900, 2400, 'Yes '], [2100, 2200, 'Yes  sir']], 100], [[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]), ('regression variant: text normalization', [[[500, 1000, '  '], [1400, 2400, 'Yes sir'], [2400, 2500, 'Yes '], [2900, 3000, 'Yes sir'], [3000, 3100, 'Yes'], [3100, 3600, 'No']], 0], [[500, 1000, ''], [1400, 2400, 'Yes sir'], [2400, 2500, 'Yes'], [2900, 3000, 'Yes sir'], [3000, 3100, 'Yes'], [3100, 3600, 'No']]), ('partial repair probe: text normalization', [[[500, 600, 'Go\nnow'], [1000, 2000, 'Yes sir']], 100], [[500, 600, 'Go now'], [1000, 2000, 'Yes sir']]), ('partial repair variant: text normalization', [[[0, 1000, 'Yes'], [1041, 1141, 'Yes sir'], [1541, 2041, 'Yes  sir'], [2082, 3082, 'Yes']], 40], [[0, 1000, 'Yes'], [1041, 1141, 'Yes sir'], [1541, 2041, 'Yes sir'], [2082, 3082, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('normal control', [[[0, 100, 'No'], [199, 299, 'No']], 100], [[0, 299, 'No']]), ('normal control', [[[500, 1500, 'Yes']], 100], [[500, 1500, 'Yes']]), ('normal control', [[[0, 100, 'Yes sir'], [500, 1500, 'No'], [1599, 2099, ''], [1799, 2299, 'Yes sir'], [2400, 2500, 'Yes sir'], [1800, 2800, 'Yes sir']], 100], [[0, 100, 'Yes sir'], [500, 1500, 'No'], [1599, 2099, ''], [1799, 2299, 'Yes sir'], [2400, 2800, 'Yes sir']])], [('regression: text normalization', [[[500, 1000, ' Yes'], [300, 400, ''], [400, 1400, 'Yes sir'], [1401, 1501, 'No'], [801, 1301, 'Yes sir']], 0], [[500, 1000, 'Yes'], [300, 400, ''], [400, 1400, 'Yes sir'], [1401, 1501, 'No'], [801, 1301, 'Yes sir']]), ('regression variant: text normalization', [[[500, 1000, 'No'], [1099, 1599, 'Go now'], [1700, 1800, '  '], [1899, 1999, '']], 100], [[500, 1000, 'No'], [1099, 1599, 'Go now'], [1700, 1800, ''], [1899, 1999, '']]), ('partial repair probe: text normalization', [[[0, 500, 'Yes  sir'], [-200, -100, '  '], [1, 101, 'Go\nnow'], [501, 601, 'Yes'], [700, 1700, 'Go now']], 100], [[0, 500, 'Yes sir'], [-200, -100, ''], [1, 101, 'Go now'], [501, 601, 'Yes'], [700, 1700, 'Go now']]), ('partial repair variant: text normalization', [[[500, 1500, 'Go now'], [1900, 2400, 'Yes '], [2800, 3800, 'No'], [3800, 4800, 'Yes sir'], [4801, 5801, 'Yes  sir'], [5501, 5601, ' Yes']], 0], [[500, 1500, 'Go now'], [1900, 2400, 'Yes'], [2800, 3800, 'No'], [3800, 4800, 'Yes sir'], [4801, 5801, 'Yes sir'], [5501, 5601, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[500, 600, 'Go now']], 0], [[500, 600, 'Go now']]), ('normal control', [[[500, 1000, 'Go now']], 40], [[500, 1000, 'Go now']]), ('normal control', [[[0, 100, 'Yes']], 100], [[0, 100, 'Yes']])]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(*args), 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
regression: text normalization	`[[0, 100, ''], [100, 200, '']]`	`[[0, 100, ''], [100, 200, '']]`	Passed
regression variant: text normalization	`[[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]`	`[[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]`	Passed
partial repair probe: text normalization	`[[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]`	`[[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]`	Passed
partial repair variant: text normalization	`[[500, 1500, 'Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes'], [2501, 3001, 'Go now']]`	`[[500, 1500, 'Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes'], [2501, 3001, 'Go now']]`	Passed
boundary control	`[[0, 900, 'Yes']]`	`[[0, 900, 'Yes']]`	Passed
boundary control	`[[0, 500, 'Yes']]`	`[[0, 500, 'Yes']]`	Passed
normal control	`[[0, 100, 'A'], [150, 200, 'A']]`	`[[0, 100, 'A'], [150, 200, 'A']]`	Passed
normal control	`[[500, 1000, ''], [1000, 1100, 'Go now']]`	`[[500, 1000, ''], [1000, 1100, 'Go now']]`	Passed
normal control	`[[500, 1500, ''], [1200, 1300, 'Yes']]`	`[[500, 1500, ''], [1200, 1300, 'Yes']]`	Passed

SHA-256 / 146953bf65a3b24ecadc8a3fba348896d42c778d898c248eaa28da17606fac12

Verification & scope

A deterministic bounded teaching model with a stipulated toy contract; it does not claim conformance to any subtitle standard. 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 2026-09-29T14:49:32.057813+00:00.

Case digest / 1ab7d7551957752cb0d34b0fb8f3db9da7b08c8b9077d28f4354760ee7866b48