{
  "name": "invalid/invalid-pattern",
  "why": "§4: a pattern that does not compile throws",
  "rules": {
    "columns": [
      {
        "key": "v",
        "pattern": "("
      }
    ]
  },
  "rows": [
    {
      "v": "x"
    }
  ],
  "expect": {
    "throws": "not a valid regular expression"
  }
}