[
  {
    "input": {
      "type": "Locale",
      "identifier": "pl-US-x-waytoolongkey"
    },
    "output": {
      "error": "InvalidExtension",
      "text": "Invalid subtag"
    }
  },
  {
    "input": {
      "type": "Locale",
      "identifier": "pl-US-x-@A_3"
    },
    "output": {
      "error": "InvalidExtension",
      "text": "Invalid subtag"
    }
  },
  {
    "input": {
      "type": "Locale",
      "identifier": "pl-US-t-h0"
    },
    "output": {
      "error": "InvalidExtension",
      "text": "Invalid subtag"
    }
  },
  {
    "input": {
      "type": "Locale",
      "identifier": "pl-US-t-h0-x-foo"
    },
    "output": {
      "error": "InvalidExtension",
      "text": "Invalid subtag"
    }
  },
  {
    "input": {
      "type": "Locale",
      "identifier": "pl-US-t-h0"
    },
    "output": {
      "error": "InvalidExtension",
      "text": "Invalid subtag"
    }
  },
  {
    "input": {
      "type": "Locale",
      "identifier": "und-t-m0"
    },
    "output": {
      "error": "InvalidExtension",
      "text": "Invalid subtag"
    }
  },
  {
    "input": {
      "type": "Locale",
      "identifier": "und-t-m0-n0-mixed"
    },
    "output": {
      "error": "InvalidExtension",
      "text": "Invalid subtag"
    }
  },
  {
    "input": {
      "type": "Locale",
      "identifier": "da-u"
    },
    "output": {
      "error": "InvalidExtension",
      "text": "Invalid subtag"
    }
  },
  {
    "input": {
      "type": "Locale",
      "identifier": "da-u--"
    },
    "output": {
      "error": "InvalidExtension",
      "text": "Invalid subtag"
    }
  },
  {
    "input": {
      "type": "Locale",
      "identifier": "da-u-t-latn"
    },
    "output": {
      "error": "InvalidExtension",
      "text": "Invalid subtag"
    }
  },
  {
    "input": {
      "type": "Locale",
      "identifier": "cmn-hans-cn-u-u"
    },
    "output": {
      "error": "InvalidExtension",
      "text": "Invalid subtag"
    }
  }
]