output.json

{
  "type": "File",
  "start":0,"end":37,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":2}},
  "errors": [
    "SyntaxError: Redefinition of __proto__ property. (3:2)"
  ],
  "program": {
    "type": "Program",
    "start":0,"end":37,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":2}},
    "sourceType": "script",
    "interpreter": null,
    "body": [
      {
        "type": "ExpressionStatement",
        "start":0,"end":37,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":2}},
        "expression": {
          "type": "ObjectExpression",
          "start":1,"end":36,"loc":{"start":{"line":1,"column":1},"end":{"line":4,"column":1}},
          "properties": [
            {
              "type": "ObjectProperty",
              "start":5,"end":17,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":14}},
              "method": false,
              "key": {
                "type": "Identifier",
                "start":5,"end":14,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":11},"identifierName":"__proto__"},
                "name": "__proto__"
              },
              "computed": false,
              "shorthand": false,
              "value": {
                "type": "Identifier",
                "start":16,"end":17,"loc":{"start":{"line":2,"column":13},"end":{"line":2,"column":14},"identifierName":"a"},
                "name": "a"
              }
            },
            {
              "type": "ObjectProperty",
              "start":21,"end":33,"loc":{"start":{"line":3,"column":2},"end":{"line":3,"column":14}},
              "method": false,
              "key": {
                "type": "Identifier",
                "start":21,"end":30,"loc":{"start":{"line":3,"column":2},"end":{"line":3,"column":11},"identifierName":"__proto__"},
                "name": "__proto__"
              },
              "computed": false,
              "shorthand": false,
              "value": {
                "type": "Identifier",
                "start":32,"end":33,"loc":{"start":{"line":3,"column":13},"end":{"line":3,"column":14},"identifierName":"a"},
                "name": "a"
              }
            }
          ],
          "extra": {
            "trailingComma": 33,
            "parenthesized": true,
            "parenStart": 0
          }
        }
      }
    ],
    "directives": []
  }
}