FAILURE MAP
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FA-39856 / Heap invariants / Open access

Binomial forest size sums roots instead of tree populations · case 01

The bounded binomial forest certificate reports an incorrect population.

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

ROOT CAUSE

A root summarizes an entire tree, not one queue member.

THE FAILURE

A root summarizes an entire tree, not one queue member.

Unsuccessful approach: The local patch uses sum(x[0]+1 for x in r) and still violates the stated relation.

Case contract

For a binomial-forest certificate, roots is a list of [rank,key,node_count,child_ranks]. Report canonical rank order, duplicate ranks, root minimum, size, tree-cardinality failures, and descending child-rank failures. No implicit tree nodes are present.

Why this case matters

This isolates an internal heap representation or priority-structure invariant using deterministic finite records.

1 / The failure

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

N = 1
observations = []
def solve(d):
    r = d['roots']
    return {'canonical': sorted([x[0] for x in r]),
    'collisions': sorted({x[0] for x in r if sum(y[0]==x[0] for y in r)>1}),
    'minimum': min([x[1] for x in r],default=None),
    'population': len(r),
    'cardinality': [i for i,x in enumerate(r) if x[2] != 2**x[0]],
    'children': [i for i,x in enumerate(r) if x[3] != list(range(x[0]-1,-1,-1))]}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = [[({'roots': []}, {'canonical': [], 'collisions': [], 'minimum': None, 'population': 0, 'cardinality': [], 'children': []}), ({'roots': [[0, 8, 1, []]]}, {'canonical': [0], 'collisions': [], 'minimum': 8, 'population': 1, 'cardinality': [], 'children': []}), ({'roots': [[2, 9, 4, [1, 0]], [0, 3, 1, []], [2, 2, 4, [1, 0]]]}, {'canonical': [0, 2, 2], 'collisions': [2], 'minimum': 2, 'population': 9, 'cardinality': [], 'children': []}), ({'roots': [[3, 1, 8, [2, 1, 0]], [1, 5, 2, [0]]]}, {'canonical': [1, 3], 'collisions': [], 'minimum': 1, 'population': 10, 'cardinality': [], 'children': []}), ({'roots': [[2, 4, 5, [0, 1]], [1, 4, 1, [0]]]}, {'canonical': [1, 2], 'collisions': [], 'minimum': 4, 'population': 6, 'cardinality': [0, 1], 'children': [0]}), ({'roots': [[1, 7, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]}), ({'roots': [[1, 8, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]})], [({'roots': []}, {'canonical': [], 'collisions': [], 'minimum': None, 'population': 0, 'cardinality': [], 'children': []}), ({'roots': [[0, 8, 1, []]]}, {'canonical': [0], 'collisions': [], 'minimum': 8, 'population': 1, 'cardinality': [], 'children': []}), ({'roots': [[2, 9, 4, [1, 0]], [0, 3, 1, []], [2, 2, 4, [1, 0]]]}, {'canonical': [0, 2, 2], 'collisions': [2], 'minimum': 2, 'population': 9, 'cardinality': [], 'children': []}), ({'roots': [[3, 1, 8, [2, 1, 0]], [1, 5, 2, [0]]]}, {'canonical': [1, 3], 'collisions': [], 'minimum': 1, 'population': 10, 'cardinality': [], 'children': []}), ({'roots': [[2, 4, 5, [0, 1]], [1, 4, 1, [0]]]}, {'canonical': [1, 2], 'collisions': [], 'minimum': 4, 'population': 6, 'cardinality': [0, 1], 'children': [0]}), ({'roots': [[1, 7, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]}), ({'roots': [[1, 9, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]})], [({'roots': []}, {'canonical': [], 'collisions': [], 'minimum': None, 'population': 0, 'cardinality': [], 'children': []}), ({'roots': [[0, 8, 1, []]]}, {'canonical': [0], 'collisions': [], 'minimum': 8, 'population': 1, 'cardinality': [], 'children': []}), ({'roots': [[2, 9, 4, [1, 0]], [0, 3, 1, []], [2, 2, 4, [1, 0]]]}, {'canonical': [0, 2, 2], 'collisions': [2], 'minimum': 2, 'population': 9, 'cardinality': [], 'children': []}), ({'roots': [[3, 1, 8, [2, 1, 0]], [1, 5, 2, [0]]]}, {'canonical': [1, 3], 'collisions': [], 'minimum': 1, 'population': 10, 'cardinality': [], 'children': []}), ({'roots': [[2, 4, 5, [0, 1]], [1, 4, 1, [0]]]}, {'canonical': [1, 2], 'collisions': [], 'minimum': 4, 'population': 6, 'cardinality': [0, 1], 'children': [0]}), ({'roots': [[1, 7, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]}), ({'roots': [[1, 10, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]})], [({'roots': []}, {'canonical': [], 'collisions': [], 'minimum': None, 'population': 0, 'cardinality': [], 'children': []}), ({'roots': [[0, 8, 1, []]]}, {'canonical': [0], 'collisions': [], 'minimum': 8, 'population': 1, 'cardinality': [], 'children': []}), ({'roots': [[2, 9, 4, [1, 0]], [0, 3, 1, []], [2, 2, 4, [1, 0]]]}, {'canonical': [0, 2, 2], 'collisions': [2], 'minimum': 2, 'population': 9, 'cardinality': [], 'children': []}), ({'roots': [[3, 1, 8, [2, 1, 0]], [1, 5, 2, [0]]]}, {'canonical': [1, 3], 'collisions': [], 'minimum': 1, 'population': 10, 'cardinality': [], 'children': []}), ({'roots': [[2, 4, 5, [0, 1]], [1, 4, 1, [0]]]}, {'canonical': [1, 2], 'collisions': [], 'minimum': 4, 'population': 6, 'cardinality': [0, 1], 'children': [0]}), ({'roots': [[1, 7, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]}), ({'roots': [[1, 11, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]})], [({'roots': []}, {'canonical': [], 'collisions': [], 'minimum': None, 'population': 0, 'cardinality': [], 'children': []}), ({'roots': [[0, 8, 1, []]]}, {'canonical': [0], 'collisions': [], 'minimum': 8, 'population': 1, 'cardinality': [], 'children': []}), ({'roots': [[2, 9, 4, [1, 0]], [0, 3, 1, []], [2, 2, 4, [1, 0]]]}, {'canonical': [0, 2, 2], 'collisions': [2], 'minimum': 2, 'population': 9, 'cardinality': [], 'children': []}), ({'roots': [[3, 1, 8, [2, 1, 0]], [1, 5, 2, [0]]]}, {'canonical': [1, 3], 'collisions': [], 'minimum': 1, 'population': 10, 'cardinality': [], 'children': []}), ({'roots': [[2, 4, 5, [0, 1]], [1, 4, 1, [0]]]}, {'canonical': [1, 2], 'collisions': [], 'minimum': 4, 'population': 6, 'cardinality': [0, 1], 'children': [0]}), ({'roots': [[1, 7, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]}), ({'roots': [[1, 12, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]})]][N-1]
check('regression certificate 1', solve(cases[0][0]), cases[0][1])
check('regression certificate 2', solve(cases[1][0]), cases[1][1])
check('regression certificate 3', solve(cases[2][0]), cases[2][1])
check('regression certificate 4', solve(cases[3][0]), cases[3][1])
check('regression certificate 5', solve(cases[4][0]), cases[4][1])
check('regression certificate 6', solve(cases[5][0]), cases[5][1])
check('variant-dependent certificate', solve(cases[6][0]), cases[6][1])
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
regression certificate 1{'canonical': [], 'cardinality': [], 'children': [], 'collisions': [], 'minimum': None, 'population': 0}{'canonical': [], 'cardinality': [], 'children': [], 'collisions': [], 'minimum': None, 'population': 0}Passed
regression certificate 2{'canonical': [0], 'cardinality': [], 'children': [], 'collisions': [], 'minimum': 8, 'population': 1}{'canonical': [0], 'cardinality': [], 'children': [], 'collisions': [], 'minimum': 8, 'population': 1}Passed
regression certificate 3{'canonical': [0, 2, 2], 'cardinality': [], 'children': [], 'collisions': [2], 'minimum': 2, 'population': 3}{'canonical': [0, 2, 2], 'cardinality': [], 'children': [], 'collisions': [2], 'minimum': 2, 'population': 9}Failed
regression certificate 4{'canonical': [1, 3], 'cardinality': [], 'children': [], 'collisions': [], 'minimum': 1, 'population': 2}{'canonical': [1, 3], 'cardinality': [], 'children': [], 'collisions': [], 'minimum': 1, 'population': 10}Failed
regression certificate 5{'canonical': [1, 2], 'cardinality': [0, 1], 'children': [0], 'collisions': [], 'minimum': 4, 'population': 2}{'canonical': [1, 2], 'cardinality': [0, 1], 'children': [0], 'collisions': [], 'minimum': 4, 'population': 6}Failed
regression certificate 6{'canonical': [1, 1, 3], 'cardinality': [1], 'children': [0, 1], 'collisions': [1], 'minimum': 0, 'population': 3}{'canonical': [1, 1, 3], 'cardinality': [1], 'children': [0, 1], 'collisions': [1], 'minimum': 0, 'population': 11}Failed
variant-dependent certificate{'canonical': [1, 1, 3], 'cardinality': [1], 'children': [0, 1], 'collisions': [1], 'minimum': 0, 'population': 3}{'canonical': [1, 1, 3], 'cardinality': [1], 'children': [0, 1], 'collisions': [1], 'minimum': 0, 'population': 11}Failed

SHA-256 / d0b85c250acf32f8a2be092da427bc607acb85d582a2d93d478a0e3de15467e3

2 / The unsuccessful fix

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

N = 1
observations = []
def solve(d):
    r = d['roots']
    return {'canonical': sorted([x[0] for x in r]),
    'collisions': sorted({x[0] for x in r if sum(y[0]==x[0] for y in r)>1}),
    'minimum': min([x[1] for x in r],default=None),
    'population': sum(x[0]+1 for x in r),
    'cardinality': [i for i,x in enumerate(r) if x[2] != 2**x[0]],
    'children': [i for i,x in enumerate(r) if x[3] != list(range(x[0]-1,-1,-1))]}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = [[({'roots': []}, {'canonical': [], 'collisions': [], 'minimum': None, 'population': 0, 'cardinality': [], 'children': []}), ({'roots': [[0, 8, 1, []]]}, {'canonical': [0], 'collisions': [], 'minimum': 8, 'population': 1, 'cardinality': [], 'children': []}), ({'roots': [[2, 9, 4, [1, 0]], [0, 3, 1, []], [2, 2, 4, [1, 0]]]}, {'canonical': [0, 2, 2], 'collisions': [2], 'minimum': 2, 'population': 9, 'cardinality': [], 'children': []}), ({'roots': [[3, 1, 8, [2, 1, 0]], [1, 5, 2, [0]]]}, {'canonical': [1, 3], 'collisions': [], 'minimum': 1, 'population': 10, 'cardinality': [], 'children': []}), ({'roots': [[2, 4, 5, [0, 1]], [1, 4, 1, [0]]]}, {'canonical': [1, 2], 'collisions': [], 'minimum': 4, 'population': 6, 'cardinality': [0, 1], 'children': [0]}), ({'roots': [[1, 7, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]}), ({'roots': [[1, 8, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]})], [({'roots': []}, {'canonical': [], 'collisions': [], 'minimum': None, 'population': 0, 'cardinality': [], 'children': []}), ({'roots': [[0, 8, 1, []]]}, {'canonical': [0], 'collisions': [], 'minimum': 8, 'population': 1, 'cardinality': [], 'children': []}), ({'roots': [[2, 9, 4, [1, 0]], [0, 3, 1, []], [2, 2, 4, [1, 0]]]}, {'canonical': [0, 2, 2], 'collisions': [2], 'minimum': 2, 'population': 9, 'cardinality': [], 'children': []}), ({'roots': [[3, 1, 8, [2, 1, 0]], [1, 5, 2, [0]]]}, {'canonical': [1, 3], 'collisions': [], 'minimum': 1, 'population': 10, 'cardinality': [], 'children': []}), ({'roots': [[2, 4, 5, [0, 1]], [1, 4, 1, [0]]]}, {'canonical': [1, 2], 'collisions': [], 'minimum': 4, 'population': 6, 'cardinality': [0, 1], 'children': [0]}), ({'roots': [[1, 7, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]}), ({'roots': [[1, 9, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]})], [({'roots': []}, {'canonical': [], 'collisions': [], 'minimum': None, 'population': 0, 'cardinality': [], 'children': []}), ({'roots': [[0, 8, 1, []]]}, {'canonical': [0], 'collisions': [], 'minimum': 8, 'population': 1, 'cardinality': [], 'children': []}), ({'roots': [[2, 9, 4, [1, 0]], [0, 3, 1, []], [2, 2, 4, [1, 0]]]}, {'canonical': [0, 2, 2], 'collisions': [2], 'minimum': 2, 'population': 9, 'cardinality': [], 'children': []}), ({'roots': [[3, 1, 8, [2, 1, 0]], [1, 5, 2, [0]]]}, {'canonical': [1, 3], 'collisions': [], 'minimum': 1, 'population': 10, 'cardinality': [], 'children': []}), ({'roots': [[2, 4, 5, [0, 1]], [1, 4, 1, [0]]]}, {'canonical': [1, 2], 'collisions': [], 'minimum': 4, 'population': 6, 'cardinality': [0, 1], 'children': [0]}), ({'roots': [[1, 7, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]}), ({'roots': [[1, 10, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]})], [({'roots': []}, {'canonical': [], 'collisions': [], 'minimum': None, 'population': 0, 'cardinality': [], 'children': []}), ({'roots': [[0, 8, 1, []]]}, {'canonical': [0], 'collisions': [], 'minimum': 8, 'population': 1, 'cardinality': [], 'children': []}), ({'roots': [[2, 9, 4, [1, 0]], [0, 3, 1, []], [2, 2, 4, [1, 0]]]}, {'canonical': [0, 2, 2], 'collisions': [2], 'minimum': 2, 'population': 9, 'cardinality': [], 'children': []}), ({'roots': [[3, 1, 8, [2, 1, 0]], [1, 5, 2, [0]]]}, {'canonical': [1, 3], 'collisions': [], 'minimum': 1, 'population': 10, 'cardinality': [], 'children': []}), ({'roots': [[2, 4, 5, [0, 1]], [1, 4, 1, [0]]]}, {'canonical': [1, 2], 'collisions': [], 'minimum': 4, 'population': 6, 'cardinality': [0, 1], 'children': [0]}), ({'roots': [[1, 7, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]}), ({'roots': [[1, 11, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]})], [({'roots': []}, {'canonical': [], 'collisions': [], 'minimum': None, 'population': 0, 'cardinality': [], 'children': []}), ({'roots': [[0, 8, 1, []]]}, {'canonical': [0], 'collisions': [], 'minimum': 8, 'population': 1, 'cardinality': [], 'children': []}), ({'roots': [[2, 9, 4, [1, 0]], [0, 3, 1, []], [2, 2, 4, [1, 0]]]}, {'canonical': [0, 2, 2], 'collisions': [2], 'minimum': 2, 'population': 9, 'cardinality': [], 'children': []}), ({'roots': [[3, 1, 8, [2, 1, 0]], [1, 5, 2, [0]]]}, {'canonical': [1, 3], 'collisions': [], 'minimum': 1, 'population': 10, 'cardinality': [], 'children': []}), ({'roots': [[2, 4, 5, [0, 1]], [1, 4, 1, [0]]]}, {'canonical': [1, 2], 'collisions': [], 'minimum': 4, 'population': 6, 'cardinality': [0, 1], 'children': [0]}), ({'roots': [[1, 7, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]}), ({'roots': [[1, 12, 2, []], [3, 0, 7, [2, 0, 1]], [1, 2, 2, [0]]]}, {'canonical': [1, 1, 3], 'collisions': [1], 'minimum': 0, 'population': 11, 'cardinality': [1], 'children': [0, 1]})]][N-1]
check('regression certificate 1', solve(cases[0][0]), cases[0][1])
check('regression certificate 2', solve(cases[1][0]), cases[1][1])
check('regression certificate 3', solve(cases[2][0]), cases[2][1])
check('regression certificate 4', solve(cases[3][0]), cases[3][1])
check('regression certificate 5', solve(cases[4][0]), cases[4][1])
check('regression certificate 6', solve(cases[5][0]), cases[5][1])
check('variant-dependent certificate', solve(cases[6][0]), cases[6][1])
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
regression certificate 1{'canonical': [], 'cardinality': [], 'children': [], 'collisions': [], 'minimum': None, 'population': 0}{'canonical': [], 'cardinality': [], 'children': [], 'collisions': [], 'minimum': None, 'population': 0}Passed
regression certificate 2{'canonical': [0], 'cardinality': [], 'children': [], 'collisions': [], 'minimum': 8, 'population': 1}{'canonical': [0], 'cardinality': [], 'children': [], 'collisions': [], 'minimum': 8, 'population': 1}Passed
regression certificate 3{'canonical': [0, 2, 2], 'cardinality': [], 'children': [], 'collisions': [2], 'minimum': 2, 'population': 7}{'canonical': [0, 2, 2], 'cardinality': [], 'children': [], 'collisions': [2], 'minimum': 2, 'population': 9}Failed
regression certificate 4{'canonical': [1, 3], 'cardinality': [], 'children': [], 'collisions': [], 'minimum': 1, 'population': 6}{'canonical': [1, 3], 'cardinality': [], 'children': [], 'collisions': [], 'minimum': 1, 'population': 10}Failed
regression certificate 5{'canonical': [1, 2], 'cardinality': [0, 1], 'children': [0], 'collisions': [], 'minimum': 4, 'population': 5}{'canonical': [1, 2], 'cardinality': [0, 1], 'children': [0], 'collisions': [], 'minimum': 4, 'population': 6}Failed
regression certificate 6{'canonical': [1, 1, 3], 'cardinality': [1], 'children': [0, 1], 'collisions': [1], 'minimum': 0, 'population': 8}{'canonical': [1, 1, 3], 'cardinality': [1], 'children': [0, 1], 'collisions': [1], 'minimum': 0, 'population': 11}Failed
variant-dependent certificate{'canonical': [1, 1, 3], 'cardinality': [1], 'children': [0, 1], 'collisions': [1], 'minimum': 0, 'population': 8}{'canonical': [1, 1, 3], 'cardinality': [1], 'children': [0, 1], 'collisions': [1], 'minimum': 0, 'population': 11}Failed

SHA-256 / add4b190cea2136aaf55c48690c2f7181b64e41f83c5ce1a351a5f621ae930f7

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.

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Verification & scope

A stipulated offline diagnostic model; it does not implement a production allocator, concurrency protocol, or complete heap library. 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 2026-09-29T14:43:25.496784+00:00.

Case digest / 1310e6e05e2556d866eaac32b1df3b9fbe2ad60544e6fb64b7e9ec477f0f219c