{"abstract":"Cells beside a chasm are not recognized as dead ends.","category":"Procedural level generation constraints","checks":8,"contract":"Cells: '#' wall, '~' chasm (not walkable), '.' floor, 'D' door (walkable). A dead end is a '.' cell, other than start and exit ([row, col] lists), with exactly one walkable in-bounds 4-neighbour. Returns dead ends in row-major order.","evaluation_group":"w2-procedural-level-generation-constraints-dead-ends","failed_approach":"Excluding doors hides dead ends that lead into a doorway.","family":"w2-procedural-level-generation-constraints-dead-ends-walkable-neighbour","id":"FA-86606","implementations":{"attempt":{"sha256":"435a4d7539a780041a7613c6c58d34c1e40d5e69db419a80c2dd3308349088b5","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(grid, start, exit):\n    h = len(grid)\n    w = len(grid[0])\n    ends = []\n    for r in range(h):\n        for c in range(w):\n            if grid[r][c] != '.' or [r, c] in (start, exit):\n                continue\n            n = 0\n            for dr, dc in ((1, 0), (-1, 0), (0, 1), (0, -1)):\n                rr, cc = r + dr, c + dc\n                if 0 <= rr < h and 0 <= cc < w and grid[rr][cc] == '.':\n                    n += 1\n            if n == 1:\n                ends.append([r, c])\n    return ends\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncases = [[('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1',\n   [['#.#.#', '.#D~~', '..~..', '..D.~'], [1, 4], [2, 0]],\n   [[1, 0], [2, 4]]),\n  ('regression walkable neighbour #2', [['...D#~', '~.###~', '~..D..'], [1, 3], [0, 2]], [[0, 0], [2, 5]]),\n  ('regression walkable neighbour #3',\n   [['#~.#.', '#...D', 'D.#..', '#....', '##..~'], [3, 0], [3, 3]],\n   [[0, 2], [0, 4]]),\n  ('regression walkable neighbour #4', [['~D.#D', '#.#~.'], [0, 1], [1, 2]], [[0, 2], [1, 1], [1, 4]]),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['.##', '#..'], [1, 2], [0, 1]], [[1, 1]])],\n [('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1', [['...D#~', '~.###~', '~..D..'], [1, 3], [0, 2]], [[0, 0], [2, 5]]),\n  ('regression walkable neighbour #2',\n   [['#~.#.', '#...D', 'D.#..', '#....', '##..~'], [3, 0], [3, 3]],\n   [[0, 2], [0, 4]]),\n  ('regression walkable neighbour #3', [['~D.#D', '#.#~.'], [0, 1], [1, 2]], [[0, 2], [1, 1], [1, 4]]),\n  ('regression walkable neighbour #4', [['...#~.', 'D.~~.D'], [1, 1], [1, 1]], [[0, 2], [0, 5], [1, 4]]),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['.##', '#..'], [1, 2], [0, 1]], [[1, 1]])],\n [('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1', [['~D.#D', '#.#~.'], [0, 1], [1, 2]], [[0, 2], [1, 1], [1, 4]]),\n  ('fault site walkable neighbour #1', [['.~~##.', '##~DD~'], [0, 1], [1, 0]], []),\n  ('regression walkable neighbour #2', [['...#~.', 'D.~~.D'], [1, 1], [1, 1]], [[0, 2], [0, 5], [1, 4]]),\n  ('regression walkable neighbour #3', [['~.##.', 'D..#~', '...##'], [0, 3], [0, 1]], []),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['#.', '..', '##', '##', '##'], [0, 0], [1, 0]], [[0, 1]])],\n [('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1', [['...#~.', 'D.~~.D'], [1, 1], [1, 1]], [[0, 2], [0, 5], [1, 4]]),\n  ('fault site walkable neighbour #1',\n   [['..#...', '~..##.', '##~##.'], [0, 0], [0, 5]],\n   [[0, 3], [1, 2], [2, 5]]),\n  ('regression walkable neighbour #2', [['~.##.', 'D..#~', '...##'], [0, 3], [0, 1]], []),\n  ('regression walkable neighbour #3', [['##.#.', '.~#D.', 'D#.~#'], [0, 3], [1, 4]], [[0, 4], [1, 0]]),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['...', '..#'], [0, 1], [0, 0]], [[0, 2]])],\n [('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1', [['~.##.', 'D..#~', '...##'], [0, 3], [0, 1]], []),\n  ('regression walkable neighbour #2', [['##.#.', '.~#D.', 'D#.~#'], [0, 3], [1, 4]], [[0, 4], [1, 0]]),\n  ('regression walkable neighbour #3', [['D.', 'DD', '.~', '#.'], [3, 0], [3, 0]], [[2, 0]]),\n  ('regression walkable neighbour #4',\n   [['.D~~.~', '~..#.D', '#~D.#.', '#..~.#', '.#...#'], [1, 5], [0, 5]],\n   [[0, 0], [0, 4], [2, 3], [2, 5], [3, 1], [3, 4]]),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['..', '.#'], [1, 1], [1, 0]], [[0, 1]])]]\nfor label, args, expected in cases[N-1]:\n    check(label, solve(*args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"cad9c05d902cdf6a73f14de7bbc92fa69654092add686ee0a621424f8ef267d7","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(grid, start, exit):\n    h = len(grid)\n    w = len(grid[0])\n    ends = []\n    for r in range(h):\n        for c in range(w):\n            if grid[r][c] != '.' or [r, c] in (start, exit):\n                continue\n            n = 0\n            for dr, dc in ((1, 0), (-1, 0), (0, 1), (0, -1)):\n                rr, cc = r + dr, c + dc\n                if 0 <= rr < h and 0 <= cc < w and grid[rr][cc] != '#':\n                    n += 1\n            if n == 1:\n                ends.append([r, c])\n    return ends\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncases = [[('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1',\n   [['#.#.#', '.#D~~', '..~..', '..D.~'], [1, 4], [2, 0]],\n   [[1, 0], [2, 4]]),\n  ('regression walkable neighbour #2', [['...D#~', '~.###~', '~..D..'], [1, 3], [0, 2]], [[0, 0], [2, 5]]),\n  ('regression walkable neighbour #3',\n   [['#~.#.', '#...D', 'D.#..', '#....', '##..~'], [3, 0], [3, 3]],\n   [[0, 2], [0, 4]]),\n  ('regression walkable neighbour #4', [['~D.#D', '#.#~.'], [0, 1], [1, 2]], [[0, 2], [1, 1], [1, 4]]),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['.##', '#..'], [1, 2], [0, 1]], [[1, 1]])],\n [('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1', [['...D#~', '~.###~', '~..D..'], [1, 3], [0, 2]], [[0, 0], [2, 5]]),\n  ('regression walkable neighbour #2',\n   [['#~.#.', '#...D', 'D.#..', '#....', '##..~'], [3, 0], [3, 3]],\n   [[0, 2], [0, 4]]),\n  ('regression walkable neighbour #3', [['~D.#D', '#.#~.'], [0, 1], [1, 2]], [[0, 2], [1, 1], [1, 4]]),\n  ('regression walkable neighbour #4', [['...#~.', 'D.~~.D'], [1, 1], [1, 1]], [[0, 2], [0, 5], [1, 4]]),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['.##', '#..'], [1, 2], [0, 1]], [[1, 1]])],\n [('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1', [['~D.#D', '#.#~.'], [0, 1], [1, 2]], [[0, 2], [1, 1], [1, 4]]),\n  ('fault site walkable neighbour #1', [['.~~##.', '##~DD~'], [0, 1], [1, 0]], []),\n  ('regression walkable neighbour #2', [['...#~.', 'D.~~.D'], [1, 1], [1, 1]], [[0, 2], [0, 5], [1, 4]]),\n  ('regression walkable neighbour #3', [['~.##.', 'D..#~', '...##'], [0, 3], [0, 1]], []),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['#.', '..', '##', '##', '##'], [0, 0], [1, 0]], [[0, 1]])],\n [('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1', [['...#~.', 'D.~~.D'], [1, 1], [1, 1]], [[0, 2], [0, 5], [1, 4]]),\n  ('fault site walkable neighbour #1',\n   [['..#...', '~..##.', '##~##.'], [0, 0], [0, 5]],\n   [[0, 3], [1, 2], [2, 5]]),\n  ('regression walkable neighbour #2', [['~.##.', 'D..#~', '...##'], [0, 3], [0, 1]], []),\n  ('regression walkable neighbour #3', [['##.#.', '.~#D.', 'D#.~#'], [0, 3], [1, 4]], [[0, 4], [1, 0]]),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['...', '..#'], [0, 1], [0, 0]], [[0, 2]])],\n [('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1', [['~.##.', 'D..#~', '...##'], [0, 3], [0, 1]], []),\n  ('regression walkable neighbour #2', [['##.#.', '.~#D.', 'D#.~#'], [0, 3], [1, 4]], [[0, 4], [1, 0]]),\n  ('regression walkable neighbour #3', [['D.', 'DD', '.~', '#.'], [3, 0], [3, 0]], [[2, 0]]),\n  ('regression walkable neighbour #4',\n   [['.D~~.~', '~..#.D', '#~D.#.', '#..~.#', '.#...#'], [1, 5], [0, 5]],\n   [[0, 0], [0, 4], [2, 3], [2, 5], [3, 1], [3, 4]]),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['..', '.#'], [1, 1], [1, 0]], [[0, 1]])]]\nfor label, args, expected in cases[N-1]:\n    check(label, solve(*args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"fixed":{"sha256":"e14f578440f560f9d0579a66029eacd2b7e63a2dbeaac39e065f1f6bfa4ca9dd","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(grid, start, exit):\n    h = len(grid)\n    w = len(grid[0])\n    ends = []\n    for r in range(h):\n        for c in range(w):\n            if grid[r][c] != '.' or [r, c] in (start, exit):\n                continue\n            n = 0\n            for dr, dc in ((1, 0), (-1, 0), (0, 1), (0, -1)):\n                rr, cc = r + dr, c + dc\n                if 0 <= rr < h and 0 <= cc < w and grid[rr][cc] in '.D':\n                    n += 1\n            if n == 1:\n                ends.append([r, c])\n    return ends\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncases = [[('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1',\n   [['#.#.#', '.#D~~', '..~..', '..D.~'], [1, 4], [2, 0]],\n   [[1, 0], [2, 4]]),\n  ('regression walkable neighbour #2', [['...D#~', '~.###~', '~..D..'], [1, 3], [0, 2]], [[0, 0], [2, 5]]),\n  ('regression walkable neighbour #3',\n   [['#~.#.', '#...D', 'D.#..', '#....', '##..~'], [3, 0], [3, 3]],\n   [[0, 2], [0, 4]]),\n  ('regression walkable neighbour #4', [['~D.#D', '#.#~.'], [0, 1], [1, 2]], [[0, 2], [1, 1], [1, 4]]),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['.##', '#..'], [1, 2], [0, 1]], [[1, 1]])],\n [('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1', [['...D#~', '~.###~', '~..D..'], [1, 3], [0, 2]], [[0, 0], [2, 5]]),\n  ('regression walkable neighbour #2',\n   [['#~.#.', '#...D', 'D.#..', '#....', '##..~'], [3, 0], [3, 3]],\n   [[0, 2], [0, 4]]),\n  ('regression walkable neighbour #3', [['~D.#D', '#.#~.'], [0, 1], [1, 2]], [[0, 2], [1, 1], [1, 4]]),\n  ('regression walkable neighbour #4', [['...#~.', 'D.~~.D'], [1, 1], [1, 1]], [[0, 2], [0, 5], [1, 4]]),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['.##', '#..'], [1, 2], [0, 1]], [[1, 1]])],\n [('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1', [['~D.#D', '#.#~.'], [0, 1], [1, 2]], [[0, 2], [1, 1], [1, 4]]),\n  ('fault site walkable neighbour #1', [['.~~##.', '##~DD~'], [0, 1], [1, 0]], []),\n  ('regression walkable neighbour #2', [['...#~.', 'D.~~.D'], [1, 1], [1, 1]], [[0, 2], [0, 5], [1, 4]]),\n  ('regression walkable neighbour #3', [['~.##.', 'D..#~', '...##'], [0, 3], [0, 1]], []),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['#.', '..', '##', '##', '##'], [0, 0], [1, 0]], [[0, 1]])],\n [('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1', [['...#~.', 'D.~~.D'], [1, 1], [1, 1]], [[0, 2], [0, 5], [1, 4]]),\n  ('fault site walkable neighbour #1',\n   [['..#...', '~..##.', '##~##.'], [0, 0], [0, 5]],\n   [[0, 3], [1, 2], [2, 5]]),\n  ('regression walkable neighbour #2', [['~.##.', 'D..#~', '...##'], [0, 3], [0, 1]], []),\n  ('regression walkable neighbour #3', [['##.#.', '.~#D.', 'D#.~#'], [0, 3], [1, 4]], [[0, 4], [1, 0]]),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['...', '..#'], [0, 1], [0, 0]], [[0, 2]])],\n [('chasm edge #1', [['.~.', '...'], [1, 1], [1, 1]], [[0, 0], [0, 2]]),\n  ('door as neighbour #1', [['#D#', '#.#', '###'], [0, 1], [0, 1]], [[1, 1]]),\n  ('regression walkable neighbour #1', [['~.##.', 'D..#~', '...##'], [0, 3], [0, 1]], []),\n  ('regression walkable neighbour #2', [['##.#.', '.~#D.', 'D#.~#'], [0, 3], [1, 4]], [[0, 4], [1, 0]]),\n  ('regression walkable neighbour #3', [['D.', 'DD', '.~', '#.'], [3, 0], [3, 0]], [[2, 0]]),\n  ('regression walkable neighbour #4',\n   [['.D~~.~', '~..#.D', '#~D.#.', '#..~.#', '.#...#'], [1, 5], [0, 5]],\n   [[0, 0], [0, 4], [2, 3], [2, 5], [3, 1], [3, 4]]),\n  ('isolated floor #1', [['#.#', '###'], [1, 0], [1, 0]], []),\n  ('control #1', [['..', '.#'], [1, 1], [1, 0]], [[0, 1]])]]\nfor label, args, expected in cases[N-1]:\n    check(label, solve(*args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":"Deterministic toy contract stipulated for this model; integer or exact arithmetic only, not a reproduction of any specific game engine. 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.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"w2-procedural-level-generation-constraints-dead-ends-walkable-neighbour","generated_at":"2026-09-29T14:50:51.192614+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Procedural generators silently emit unplayable or unfair levels when a single constraint check uses the wrong boundary, axis, neighborhood or update order; the defect is visible in exact generated geometry.","repair":"Restore `grid[rr][cc] in '.D'` at the walkable neighbour step.","root_cause":"Any non-wall neighbour counts as walkable, including chasms.","sha256":"9ccada3e87e1818cf08a01ceb2d48d38a53803186885758143cae969bc9fc866","title":"Treasure dead-end finder: Chasms count as exits · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":39.389,"exit_code":1,"observations":[{"actual":[[0,0],[0,2]],"check":"chasm edge #1","expected":[[0,0],[0,2]],"passed":true},{"actual":[],"check":"door as neighbour #1","expected":[[1,1]],"passed":false},{"actual":[[1,0],[2,4],[3,3]],"check":"regression walkable neighbour #1","expected":[[1,0],[2,4]],"passed":false},{"actual":[[0,0],[2,2],[2,4],[2,5]],"check":"regression walkable neighbour #2","expected":[[0,0],[2,5]],"passed":false},{"actual":[[0,2]],"check":"regression walkable neighbour #3","expected":[[0,2],[0,4]],"passed":false},{"actual":[],"check":"regression walkable neighbour #4","expected":[[0,2],[1,1],[1,4]],"passed":false},{"actual":[],"check":"isolated floor #1","expected":[],"passed":true},{"actual":[[1,1]],"check":"control #1","expected":[[1,1]],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"chasm edge #1\", \"actual\": [[0, 0], [0, 2]], \"expected\": [[0, 0], [0, 2]], \"passed\": true}, {\"check\": \"door as neighbour #1\", \"actual\": [], \"expected\": [[1, 1]], \"passed\": false}, {\"check\": \"regression walkable neighbour #1\", \"actual\": [[1, 0], [2, 4], [3, 3]], \"expected\": [[1, 0], [2, 4]], \"passed\": false}, {\"check\": \"regression walkable neighbour #2\", \"actual\": [[0, 0], [2, 2], [2, 4], [2, 5]], \"expected\": [[0, 0], [2, 5]], \"passed\": false}, {\"check\": \"regression walkable neighbour #3\", \"actual\": [[0, 2]], \"expected\": [[0, 2], [0, 4]], \"passed\": false}, {\"check\": \"regression walkable neighbour #4\", \"actual\": [], \"expected\": [[0, 2], [1, 1], [1, 4]], \"passed\": false}, {\"check\": \"isolated floor #1\", \"actual\": [], \"expected\": [], \"passed\": true}, {\"check\": \"control #1\", \"actual\": [[1, 1]], \"expected\": [[1, 1]], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":40.764,"exit_code":1,"observations":[{"actual":[],"check":"chasm edge #1","expected":[[0,0],[0,2]],"passed":false},{"actual":[[1,1]],"check":"door as neighbour #1","expected":[[1,1]],"passed":true},{"actual":[[0,3],[1,0]],"check":"regression walkable neighbour #1","expected":[[1,0],[2,4]],"passed":false},{"actual":[],"check":"regression walkable neighbour #2","expected":[[0,0],[2,5]],"passed":false},{"actual":[[0,4]],"check":"regression walkable neighbour #3","expected":[[0,2],[0,4]],"passed":false},{"actual":[[0,2],[1,1]],"check":"regression walkable neighbour #4","expected":[[0,2],[1,1],[1,4]],"passed":false},{"actual":[],"check":"isolated floor #1","expected":[],"passed":true},{"actual":[[1,1]],"check":"control #1","expected":[[1,1]],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"chasm edge #1\", \"actual\": [], \"expected\": [[0, 0], [0, 2]], \"passed\": false}, 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