FA-51326 / Raster clipping / Open access
Stroke component clip union: clip components · case 01
Stroke cap and join coverage bypasses the requested final clip mask.
ROOT CAUSE
Stroke cap and join coverage bypasses the requested final clip mask.
THE FAILURE
Stroke cap and join coverage bypasses the requested final clip mask.
Unsuccessful approach: Treating an empty clip as absent exposes the complete stroke.
Case contract
Segments carry precomputed body, start-cap, end-cap and following-join sample sets plus an active flag. Active adjacent segments share a join and suppress interior caps. Inactive segments create dash gaps; each active component receives caps at its gap endpoints. A closed path connects the last and first segments. Empty bodies may still have cap coverage. Clip the complete union to the requested mask and target.
Why this case matters
Raster clip state can leak coverage across draws even when every individual region is valid.
1 / The failure
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(commands, size):
full=set(range(size))
out=[]
for segments,closed,clip in commands:
coverage=set()
count=len(segments)
for i,(body,start,end,join,active) in enumerate(segments):
if not active: continue
before=segments[i-1][4] if i>0 else (segments[-1][4] if closed and count else False)
after=segments[i+1][4] if i+1<count else (segments[0][4] if closed and count else False)
coverage.update(body)
if not before: coverage.update(start)
if not after: coverage.update(end)
if after: coverage.update(join)
out.append(sorted(coverage & full))
return out
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
if N == 1:
check('explicit sequence 0', solve([[[[[0], [1], [2], [3], False]], False, [0, 1, 2, 3]]], 4), [[]])
check('explicit sequence 1', solve([[[[[], [0], [1], [], True]], False, [0, 1, 2, 3]]], 4), [[0, 1]])
check('explicit sequence 2', solve([[[[[], [], [1], [], True]], False, [0, 1, 2, 3]]], 4), [[1]])
check('explicit sequence 3', solve([[[[[0], [2], [3], [1], True], [[1], [2], [3], [0], True]], True, [0, 1, 2, 3]]], 4), [[0, 1]])
check('explicit sequence 4', solve([[[[[0], [1], [2], [3], True], [[], [], [], [], False], [[1], [2], [3], [0], True]], False, [0, 1, 2, 3]]], 4), [[0, 1, 2, 3]])
check('explicit sequence 5', solve([[[[[0], [], [1], [2], True], [[], [], [], [], False], [[], [], [], [], False], [[], [], [], [], False]], False, [0, 1, 2, 3]]], 4), [[0, 1]])
check('explicit sequence 6', solve([[[[[0], [1], [2], [3], True]], False, [0, 1, 2, 3]]], 4), [[0, 1, 2]])
check('explicit sequence 7', solve([[[[[0], [], [], [2], True], [[1], [], [], [3], True]], False, [0, 1, 2, 3]]], 4), [[0, 1, 2]])
check('explicit sequence 8', solve([[[[[0], [], [], [2], True], [[], [], [], [], False]], True, [0, 1, 2, 3]]], 4), [[0]])
check('explicit sequence 9', solve([[[[[0, 1], [2], [3], [], True]], False, [0]]], 4), [[0]])
check('explicit sequence 10', solve([[[[[0, 1], [2], [3], [], True]], False, []]], 4), [[]])
check('explicit sequence 11', solve([[[[[0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], [], [], True]], False, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]], 4), [[0, 1, 2, 3]])
check('explicit sequence 12', solve([[[[[0], [], [], [], True], [[], [], [], [], False], [[1], [3], [], [], True]], False, [0, 1, 2, 3]]], 4), [[0, 1, 3]])
check('explicit sequence 13', solve([[[[[0], [1], [2], [3], True], [[0], [], [], [], True]], False, [0, 1, 2, 3]]], 4), [[0, 1, 3]])
if N == 2:
check('explicit sequence 0', solve([[[[[0], [1], [2], [3], False]], False, [0, 1, 2, 3]]], 5), [[]])
check('explicit sequence 1', solve([[[[[], [0], [1], [], True]], False, [0, 1, 2, 3]]], 5), [[0, 1]])
check('explicit sequence 2', solve([[[[[], [], [1], [], True]], False, [0, 1, 2, 3]]], 5), [[1]])
check('explicit sequence 3', solve([[[[[0], [2], [3], [1], True], [[1], [2], [3], [0], True]], True, [0, 1, 2, 3]]], 5), [[0, 1]])
check('explicit sequence 4', solve([[[[[0], [1], [2], [3], True], [[], [], [], [], False], [[1], [2], [3], [0], True]], False, [0, 1, 2, 3]]], 5), [[0, 1, 2, 3]])
check('explicit sequence 5', solve([[[[[0], [], [1], [2], True], [[], [], [], [], False], [[], [], [], [], False], [[], [], [], [], False]], False, [0, 1, 2, 3]]], 5), [[0, 1]])
check('explicit sequence 6', solve([[[[[0], [1], [2], [3], True]], False, [0, 1, 2, 3]]], 5), [[0, 1, 2]])
check('explicit sequence 7', solve([[[[[0], [], [], [2], True], [[1], [], [], [3], True]], False, [0, 1, 2, 3]]], 5), [[0, 1, 2]])
check('explicit sequence 8', solve([[[[[0], [], [], [2], True], [[], [], [], [], False]], True, [0, 1, 2, 3]]], 5), [[0]])
check('explicit sequence 9', solve([[[[[0, 1], [2], [3], [], True]], False, [0]]], 5), [[0]])
check('explicit sequence 10', solve([[[[[0, 1], [2], [3], [], True]], False, []]], 5), [[]])
check('explicit sequence 11', solve([[[[[0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], [], [], True]], False, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]], 5), [[0, 1, 2, 3, 4]])
check('explicit sequence 12', solve([[[[[0], [], [], [], True], [[], [], [], [], False], [[1], [3], [], [], True]], False, [0, 1, 2, 3]]], 5), [[0, 1, 3]])
check('explicit sequence 13', solve([[[[[0], [1], [2], [3], True], [[0], [], [], [], True]], False, [0, 1, 2, 3]]], 5), [[0, 1, 3]])
if N == 3:
check('explicit sequence 0', solve([[[[[0], [1], [2], [3], False]], False, [0, 1, 2, 3]]], 6), [[]])
check('explicit sequence 1', solve([[[[[], [0], [1], [], True]], False, [0, 1, 2, 3]]], 6), [[0, 1]])
check('explicit sequence 2', solve([[[[[], [], [1], [], True]], False, [0, 1, 2, 3]]], 6), [[1]])
check('explicit sequence 3', solve([[[[[0], [2], [3], [1], True], [[1], [2], [3], [0], True]], True, [0, 1, 2, 3]]], 6), [[0, 1]])
check('explicit sequence 4', solve([[[[[0], [1], [2], [3], True], [[], [], [], [], False], [[1], [2], [3], [0], True]], False, [0, 1, 2, 3]]], 6), [[0, 1, 2, 3]])
check('explicit sequence 5', solve([[[[[0], [], [1], [2], True], [[], [], [], [], False], [[], [], [], [], False], [[], [], [], [], False]], False, [0, 1, 2, 3]]], 6), [[0, 1]])
check('explicit sequence 6', solve([[[[[0], [1], [2], [3], True]], False, [0, 1, 2, 3]]], 6), [[0, 1, 2]])
check('explicit sequence 7', solve([[[[[0], [], [], [2], True], [[1], [], [], [3], True]], False, [0, 1, 2, 3]]], 6), [[0, 1, 2]])
check('explicit sequence 8', solve([[[[[0], [], [], [2], True], [[], [], [], [], False]], True, [0, 1, 2, 3]]], 6), [[0]])
check('explicit sequence 9', solve([[[[[0, 1], [2], [3], [], True]], False, [0]]], 6), [[0]])
check('explicit sequence 10', solve([[[[[0, 1], [2], [3], [], True]], False, []]], 6), [[]])
check('explicit sequence 11', solve([[[[[0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], [], [], True]], False, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]], 6), [[0, 1, 2, 3, 4, 5]])
check('explicit sequence 12', solve([[[[[0], [], [], [], True], [[], [], [], [], False], [[1], [3], [], [], True]], False, [0, 1, 2, 3]]], 6), [[0, 1, 3]])
check('explicit sequence 13', solve([[[[[0], [1], [2], [3], True], [[0], [], [], [], True]], False, [0, 1, 2, 3]]], 6), [[0, 1, 3]])
if N == 4:
check('explicit sequence 0', solve([[[[[0], [1], [2], [3], False]], False, [0, 1, 2, 3]]], 7), [[]])
check('explicit sequence 1', solve([[[[[], [0], [1], [], True]], False, [0, 1, 2, 3]]], 7), [[0, 1]])
check('explicit sequence 2', solve([[[[[], [], [1], [], True]], False, [0, 1, 2, 3]]], 7), [[1]])
check('explicit sequence 3', solve([[[[[0], [2], [3], [1], True], [[1], [2], [3], [0], True]], True, [0, 1, 2, 3]]], 7), [[0, 1]])
check('explicit sequence 4', solve([[[[[0], [1], [2], [3], True], [[], [], [], [], False], [[1], [2], [3], [0], True]], False, [0, 1, 2, 3]]], 7), [[0, 1, 2, 3]])
check('explicit sequence 5', solve([[[[[0], [], [1], [2], True], [[], [], [], [], False], [[], [], [], [], False], [[], [], [], [], False]], False, [0, 1, 2, 3]]], 7), [[0, 1]])
check('explicit sequence 6', solve([[[[[0], [1], [2], [3], True]], False, [0, 1, 2, 3]]], 7), [[0, 1, 2]])
check('explicit sequence 7', solve([[[[[0], [], [], [2], True], [[1], [], [], [3], True]], False, [0, 1, 2, 3]]], 7), [[0, 1, 2]])
check('explicit sequence 8', solve([[[[[0], [], [], [2], True], [[], [], [], [], False]], True, [0, 1, 2, 3]]], 7), [[0]])
check('explicit sequence 9', solve([[[[[0, 1], [2], [3], [], True]], False, [0]]], 7), [[0]])
check('explicit sequence 10', solve([[[[[0, 1], [2], [3], [], True]], False, []]], 7), [[]])
check('explicit sequence 11', solve([[[[[0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], [], [], True]], False, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]], 7), [[0, 1, 2, 3, 4, 5, 6]])
check('explicit sequence 12', solve([[[[[0], [], [], [], True], [[], [], [], [], False], [[1], [3], [], [], True]], False, [0, 1, 2, 3]]], 7), [[0, 1, 3]])
check('explicit sequence 13', solve([[[[[0], [1], [2], [3], True], [[0], [], [], [], True]], False, [0, 1, 2, 3]]], 7), [[0, 1, 3]])
if N == 5:
check('explicit sequence 0', solve([[[[[0], [1], [2], [3], False]], False, [0, 1, 2, 3]]], 8), [[]])
check('explicit sequence 1', solve([[[[[], [0], [1], [], True]], False, [0, 1, 2, 3]]], 8), [[0, 1]])
check('explicit sequence 2', solve([[[[[], [], [1], [], True]], False, [0, 1, 2, 3]]], 8), [[1]])
check('explicit sequence 3', solve([[[[[0], [2], [3], [1], True], [[1], [2], [3], [0], True]], True, [0, 1, 2, 3]]], 8), [[0, 1]])
check('explicit sequence 4', solve([[[[[0], [1], [2], [3], True], [[], [], [], [], False], [[1], [2], [3], [0], True]], False, [0, 1, 2, 3]]], 8), [[0, 1, 2, 3]])
check('explicit sequence 5', solve([[[[[0], [], [1], [2], True], [[], [], [], [], False], [[], [], [], [], False], [[], [], [], [], False]], False, [0, 1, 2, 3]]], 8), [[0, 1]])
check('explicit sequence 6', solve([[[[[0], [1], [2], [3], True]], False, [0, 1, 2, 3]]], 8), [[0, 1, 2]])
check('explicit sequence 7', solve([[[[[0], [], [], [2], True], [[1], [], [], [3], True]], False, [0, 1, 2, 3]]], 8), [[0, 1, 2]])
check('explicit sequence 8', solve([[[[[0], [], [], [2], True], [[], [], [], [], False]], True, [0, 1, 2, 3]]], 8), [[0]])
check('explicit sequence 9', solve([[[[[0, 1], [2], [3], [], True]], False, [0]]], 8), [[0]])
check('explicit sequence 10', solve([[[[[0, 1], [2], [3], [], True]], False, []]], 8), [[]])
check('explicit sequence 11', solve([[[[[0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], [], [], True]], False, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]], 8), [[0, 1, 2, 3, 4, 5, 6, 7]])
check('explicit sequence 12', solve([[[[[0], [], [], [], True], [[], [], [], [], False], [[1], [3], [], [], True]], False, [0, 1, 2, 3]]], 8), [[0, 1, 3]])
check('explicit sequence 13', solve([[[[[0], [1], [2], [3], True], [[0], [], [], [], True]], False, [0, 1, 2, 3]]], 8), [[0, 1, 3]])
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 |
|---|---|---|---|
| explicit sequence 0 | [[]] | [[]] | Passed |
| explicit sequence 1 | [[0, 1]] | [[0, 1]] | Passed |
| explicit sequence 2 | [[1]] | [[1]] | Passed |
| explicit sequence 3 | [[0, 1]] | [[0, 1]] | Passed |
| explicit sequence 4 | [[0, 1, 2, 3]] | [[0, 1, 2, 3]] | Passed |
| explicit sequence 5 | [[0, 1]] | [[0, 1]] | Passed |
| explicit sequence 6 | [[0, 1, 2]] | [[0, 1, 2]] | Passed |
| explicit sequence 7 | [[0, 1, 2]] | [[0, 1, 2]] | Passed |
| explicit sequence 8 | [[0]] | [[0]] | Passed |
| explicit sequence 9 | [[0, 1, 2, 3]] | [[0]] | Failed |
| explicit sequence 10 | [[0, 1, 2, 3]] | [[]] | Failed |
| explicit sequence 11 | [[0, 1, 2, 3]] | [[0, 1, 2, 3]] | Passed |
| explicit sequence 12 | [[0, 1, 3]] | [[0, 1, 3]] | Passed |
| explicit sequence 13 | [[0, 1, 3]] | [[0, 1, 3]] | Passed |
SHA-256 / 2de5290b8c14b94fb4c566e52822ddef689a1f89cf8c36d13476b53a9c873db3
2 / The unsuccessful fix
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(commands, size):
full=set(range(size))
out=[]
for segments,closed,clip in commands:
coverage=set()
count=len(segments)
for i,(body,start,end,join,active) in enumerate(segments):
if not active: continue
before=segments[i-1][4] if i>0 else (segments[-1][4] if closed and count else False)
after=segments[i+1][4] if i+1<count else (segments[0][4] if closed and count else False)
coverage.update(body)
if not before: coverage.update(start)
if not after: coverage.update(end)
if after: coverage.update(join)
out.append(sorted(coverage & set(clip) if clip else coverage & full))
return out
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
if N == 1:
check('explicit sequence 0', solve([[[[[0], [1], [2], [3], False]], False, [0, 1, 2, 3]]], 4), [[]])
check('explicit sequence 1', solve([[[[[], [0], [1], [], True]], False, [0, 1, 2, 3]]], 4), [[0, 1]])
check('explicit sequence 2', solve([[[[[], [], [1], [], True]], False, [0, 1, 2, 3]]], 4), [[1]])
check('explicit sequence 3', solve([[[[[0], [2], [3], [1], True], [[1], [2], [3], [0], True]], True, [0, 1, 2, 3]]], 4), [[0, 1]])
check('explicit sequence 4', solve([[[[[0], [1], [2], [3], True], [[], [], [], [], False], [[1], [2], [3], [0], True]], False, [0, 1, 2, 3]]], 4), [[0, 1, 2, 3]])
check('explicit sequence 5', solve([[[[[0], [], [1], [2], True], [[], [], [], [], False], [[], [], [], [], False], [[], [], [], [], False]], False, [0, 1, 2, 3]]], 4), [[0, 1]])
check('explicit sequence 6', solve([[[[[0], [1], [2], [3], True]], False, [0, 1, 2, 3]]], 4), [[0, 1, 2]])
check('explicit sequence 7', solve([[[[[0], [], [], [2], True], [[1], [], [], [3], True]], False, [0, 1, 2, 3]]], 4), [[0, 1, 2]])
check('explicit sequence 8', solve([[[[[0], [], [], [2], True], [[], [], [], [], False]], True, [0, 1, 2, 3]]], 4), [[0]])
check('explicit sequence 9', solve([[[[[0, 1], [2], [3], [], True]], False, [0]]], 4), [[0]])
check('explicit sequence 10', solve([[[[[0, 1], [2], [3], [], True]], False, []]], 4), [[]])
check('explicit sequence 11', solve([[[[[0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], [], [], True]], False, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]], 4), [[0, 1, 2, 3]])
check('explicit sequence 12', solve([[[[[0], [], [], [], True], [[], [], [], [], False], [[1], [3], [], [], True]], False, [0, 1, 2, 3]]], 4), [[0, 1, 3]])
check('explicit sequence 13', solve([[[[[0], [1], [2], [3], True], [[0], [], [], [], True]], False, [0, 1, 2, 3]]], 4), [[0, 1, 3]])
if N == 2:
check('explicit sequence 0', solve([[[[[0], [1], [2], [3], False]], False, [0, 1, 2, 3]]], 5), [[]])
check('explicit sequence 1', solve([[[[[], [0], [1], [], True]], False, [0, 1, 2, 3]]], 5), [[0, 1]])
check('explicit sequence 2', solve([[[[[], [], [1], [], True]], False, [0, 1, 2, 3]]], 5), [[1]])
check('explicit sequence 3', solve([[[[[0], [2], [3], [1], True], [[1], [2], [3], [0], True]], True, [0, 1, 2, 3]]], 5), [[0, 1]])
check('explicit sequence 4', solve([[[[[0], [1], [2], [3], True], [[], [], [], [], False], [[1], [2], [3], [0], True]], False, [0, 1, 2, 3]]], 5), [[0, 1, 2, 3]])
check('explicit sequence 5', solve([[[[[0], [], [1], [2], True], [[], [], [], [], False], [[], [], [], [], False], [[], [], [], [], False]], False, [0, 1, 2, 3]]], 5), [[0, 1]])
check('explicit sequence 6', solve([[[[[0], [1], [2], [3], True]], False, [0, 1, 2, 3]]], 5), [[0, 1, 2]])
check('explicit sequence 7', solve([[[[[0], [], [], [2], True], [[1], [], [], [3], True]], False, [0, 1, 2, 3]]], 5), [[0, 1, 2]])
check('explicit sequence 8', solve([[[[[0], [], [], [2], True], [[], [], [], [], False]], True, [0, 1, 2, 3]]], 5), [[0]])
check('explicit sequence 9', solve([[[[[0, 1], [2], [3], [], True]], False, [0]]], 5), [[0]])
check('explicit sequence 10', solve([[[[[0, 1], [2], [3], [], True]], False, []]], 5), [[]])
check('explicit sequence 11', solve([[[[[0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], [], [], True]], False, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]], 5), [[0, 1, 2, 3, 4]])
check('explicit sequence 12', solve([[[[[0], [], [], [], True], [[], [], [], [], False], [[1], [3], [], [], True]], False, [0, 1, 2, 3]]], 5), [[0, 1, 3]])
check('explicit sequence 13', solve([[[[[0], [1], [2], [3], True], [[0], [], [], [], True]], False, [0, 1, 2, 3]]], 5), [[0, 1, 3]])
if N == 3:
check('explicit sequence 0', solve([[[[[0], [1], [2], [3], False]], False, [0, 1, 2, 3]]], 6), [[]])
check('explicit sequence 1', solve([[[[[], [0], [1], [], True]], False, [0, 1, 2, 3]]], 6), [[0, 1]])
check('explicit sequence 2', solve([[[[[], [], [1], [], True]], False, [0, 1, 2, 3]]], 6), [[1]])
check('explicit sequence 3', solve([[[[[0], [2], [3], [1], True], [[1], [2], [3], [0], True]], True, [0, 1, 2, 3]]], 6), [[0, 1]])
check('explicit sequence 4', solve([[[[[0], [1], [2], [3], True], [[], [], [], [], False], [[1], [2], [3], [0], True]], False, [0, 1, 2, 3]]], 6), [[0, 1, 2, 3]])
check('explicit sequence 5', solve([[[[[0], [], [1], [2], True], [[], [], [], [], False], [[], [], [], [], False], [[], [], [], [], False]], False, [0, 1, 2, 3]]], 6), [[0, 1]])
check('explicit sequence 6', solve([[[[[0], [1], [2], [3], True]], False, [0, 1, 2, 3]]], 6), [[0, 1, 2]])
check('explicit sequence 7', solve([[[[[0], [], [], [2], True], [[1], [], [], [3], True]], False, [0, 1, 2, 3]]], 6), [[0, 1, 2]])
check('explicit sequence 8', solve([[[[[0], [], [], [2], True], [[], [], [], [], False]], True, [0, 1, 2, 3]]], 6), [[0]])
check('explicit sequence 9', solve([[[[[0, 1], [2], [3], [], True]], False, [0]]], 6), [[0]])
check('explicit sequence 10', solve([[[[[0, 1], [2], [3], [], True]], False, []]], 6), [[]])
check('explicit sequence 11', solve([[[[[0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], [], [], True]], False, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]], 6), [[0, 1, 2, 3, 4, 5]])
check('explicit sequence 12', solve([[[[[0], [], [], [], True], [[], [], [], [], False], [[1], [3], [], [], True]], False, [0, 1, 2, 3]]], 6), [[0, 1, 3]])
check('explicit sequence 13', solve([[[[[0], [1], [2], [3], True], [[0], [], [], [], True]], False, [0, 1, 2, 3]]], 6), [[0, 1, 3]])
if N == 4:
check('explicit sequence 0', solve([[[[[0], [1], [2], [3], False]], False, [0, 1, 2, 3]]], 7), [[]])
check('explicit sequence 1', solve([[[[[], [0], [1], [], True]], False, [0, 1, 2, 3]]], 7), [[0, 1]])
check('explicit sequence 2', solve([[[[[], [], [1], [], True]], False, [0, 1, 2, 3]]], 7), [[1]])
check('explicit sequence 3', solve([[[[[0], [2], [3], [1], True], [[1], [2], [3], [0], True]], True, [0, 1, 2, 3]]], 7), [[0, 1]])
check('explicit sequence 4', solve([[[[[0], [1], [2], [3], True], [[], [], [], [], False], [[1], [2], [3], [0], True]], False, [0, 1, 2, 3]]], 7), [[0, 1, 2, 3]])
check('explicit sequence 5', solve([[[[[0], [], [1], [2], True], [[], [], [], [], False], [[], [], [], [], False], [[], [], [], [], False]], False, [0, 1, 2, 3]]], 7), [[0, 1]])
check('explicit sequence 6', solve([[[[[0], [1], [2], [3], True]], False, [0, 1, 2, 3]]], 7), [[0, 1, 2]])
check('explicit sequence 7', solve([[[[[0], [], [], [2], True], [[1], [], [], [3], True]], False, [0, 1, 2, 3]]], 7), [[0, 1, 2]])
check('explicit sequence 8', solve([[[[[0], [], [], [2], True], [[], [], [], [], False]], True, [0, 1, 2, 3]]], 7), [[0]])
check('explicit sequence 9', solve([[[[[0, 1], [2], [3], [], True]], False, [0]]], 7), [[0]])
check('explicit sequence 10', solve([[[[[0, 1], [2], [3], [], True]], False, []]], 7), [[]])
check('explicit sequence 11', solve([[[[[0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], [], [], True]], False, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]], 7), [[0, 1, 2, 3, 4, 5, 6]])
check('explicit sequence 12', solve([[[[[0], [], [], [], True], [[], [], [], [], False], [[1], [3], [], [], True]], False, [0, 1, 2, 3]]], 7), [[0, 1, 3]])
check('explicit sequence 13', solve([[[[[0], [1], [2], [3], True], [[0], [], [], [], True]], False, [0, 1, 2, 3]]], 7), [[0, 1, 3]])
if N == 5:
check('explicit sequence 0', solve([[[[[0], [1], [2], [3], False]], False, [0, 1, 2, 3]]], 8), [[]])
check('explicit sequence 1', solve([[[[[], [0], [1], [], True]], False, [0, 1, 2, 3]]], 8), [[0, 1]])
check('explicit sequence 2', solve([[[[[], [], [1], [], True]], False, [0, 1, 2, 3]]], 8), [[1]])
check('explicit sequence 3', solve([[[[[0], [2], [3], [1], True], [[1], [2], [3], [0], True]], True, [0, 1, 2, 3]]], 8), [[0, 1]])
check('explicit sequence 4', solve([[[[[0], [1], [2], [3], True], [[], [], [], [], False], [[1], [2], [3], [0], True]], False, [0, 1, 2, 3]]], 8), [[0, 1, 2, 3]])
check('explicit sequence 5', solve([[[[[0], [], [1], [2], True], [[], [], [], [], False], [[], [], [], [], False], [[], [], [], [], False]], False, [0, 1, 2, 3]]], 8), [[0, 1]])
check('explicit sequence 6', solve([[[[[0], [1], [2], [3], True]], False, [0, 1, 2, 3]]], 8), [[0, 1, 2]])
check('explicit sequence 7', solve([[[[[0], [], [], [2], True], [[1], [], [], [3], True]], False, [0, 1, 2, 3]]], 8), [[0, 1, 2]])
check('explicit sequence 8', solve([[[[[0], [], [], [2], True], [[], [], [], [], False]], True, [0, 1, 2, 3]]], 8), [[0]])
check('explicit sequence 9', solve([[[[[0, 1], [2], [3], [], True]], False, [0]]], 8), [[0]])
check('explicit sequence 10', solve([[[[[0, 1], [2], [3], [], True]], False, []]], 8), [[]])
check('explicit sequence 11', solve([[[[[0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], [], [], True]], False, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]], 8), [[0, 1, 2, 3, 4, 5, 6, 7]])
check('explicit sequence 12', solve([[[[[0], [], [], [], True], [[], [], [], [], False], [[1], [3], [], [], True]], False, [0, 1, 2, 3]]], 8), [[0, 1, 3]])
check('explicit sequence 13', solve([[[[[0], [1], [2], [3], True], [[0], [], [], [], True]], False, [0, 1, 2, 3]]], 8), [[0, 1, 3]])
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 |
|---|---|---|---|
| explicit sequence 0 | [[]] | [[]] | Passed |
| explicit sequence 1 | [[0, 1]] | [[0, 1]] | Passed |
| explicit sequence 2 | [[1]] | [[1]] | Passed |
| explicit sequence 3 | [[0, 1]] | [[0, 1]] | Passed |
| explicit sequence 4 | [[0, 1, 2, 3]] | [[0, 1, 2, 3]] | Passed |
| explicit sequence 5 | [[0, 1]] | [[0, 1]] | Passed |
| explicit sequence 6 | [[0, 1, 2]] | [[0, 1, 2]] | Passed |
| explicit sequence 7 | [[0, 1, 2]] | [[0, 1, 2]] | Passed |
| explicit sequence 8 | [[0]] | [[0]] | Passed |
| explicit sequence 9 | [[0]] | [[0]] | Passed |
| explicit sequence 10 | [[0, 1, 2, 3]] | [[]] | Failed |
| explicit sequence 11 | [[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]] | [[0, 1, 2, 3]] | Failed |
| explicit sequence 12 | [[0, 1, 3]] | [[0, 1, 3]] | Passed |
| explicit sequence 13 | [[0, 1, 3]] | [[0, 1, 3]] | Passed |
SHA-256 / 443f217a86ba07a551db1f74eaa02a5b7fe2bc3d142797f92e52bf3fb8a69e19
HELD IN THE MEMBER ARCHIVE
The verified repair and its recorded checks are member-only.
This mechanism has 14 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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Sign in to the archive ↗Verification & scope
Finite one-dimensional integer sample sets model coverage state only; no geometric intersection, memory layout, GPU or graphics-standard conformance is claimed. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.
Observations recorded using Python 3.12.14 at 2026-09-29T14:45:17.779668+00:00.
Case digest / 04cdba4a87879c36d58148f4672c02e879bc2b28f820bbb83756c5c0e5e78173