[
  {
    "case": "pure-single-32768",
    "phase": "quality",
    "input_contract": "coroutines",
    "fast_failure_then_success": false,
    "error": "TypeError: 'coroutine' object is not callable"
  },
  {
    "case": "pure-single-57344",
    "phase": "quality_followup",
    "input_contract": "coroutines",
    "fast_failure_then_success": false,
    "returned": null
  },
  {
    "case": "byteshape-single-ub128-validated-104448",
    "phase": "quality_followup",
    "input_contract": "coroutines",
    "fast_failure_then_success": true,
    "returned": 7
  },
  {
    "case": "byteshape-single-32768",
    "phase": "quality",
    "input_contract": "tasks",
    "fast_failure_then_success": true,
    "returned": 7
  }
]