{
  "propertySpec": {
    "type": "color",
    "property-type": "data-driven",
    "expression": {"parameters": ["zoom", "feature"]}
  },
  "expression": ["step", ["get", "x"], "black", 0, "invalid", 10, "blue"],
  "inputs": [
    [{}, {"properties": {"x": -1}}],
    [{}, {"properties": {"x": 0}}],
    [{}, {"properties": {"x": 5}}],
    [{}, {"properties": {"x": 10}}],
    [{}, {"properties": {"x": 11}}]
  ],
  "expected": {
    "compiled": {
      "result": "error",
      "errors": [
        {"key": "[4]", "error": "Could not parse color from value 'invalid'"}
      ]
    }
  }
}