{
  "type": "FunctionExpression",
  "start": 0,
  "end": 40,
  "loc": {
    "start": {
      "line": 1,
      "column": 0
    },
    "end": {
      "line": 1,
      "column": 40
    }
  },
  "id": null,
  "generator": false,
  "async": false,
  "params": [
    {
      "type": "AssignmentPattern",
      "start": 10,
      "end": 23,
      "loc": {
        "start": {
          "line": 1,
          "column": 10
        },
        "end": {
          "line": 1,
          "column": 23
        }
      },
      "left": {
        "type": "Identifier",
        "start": 10,
        "end": 11,
        "loc": {
          "start": {
            "line": 1,
            "column": 10
          },
          "end": {
            "line": 1,
            "column": 11
          },
          "identifierName": "a"
        },
        "name": "a"
      },
      "right": {
        "type": "StringLiteral",
        "start": 14,
        "end": 23,
        "loc": {
          "start": {
            "line": 1,
            "column": 14
          },
          "end": {
            "line": 1,
            "column": 23
          }
        },
        "extra": {
          "rawValue": "default",
          "raw": "\"default\""
        },
        "value": "default"
      }
    }
  ],
  "body": {
    "type": "BlockStatement",
    "start": 25,
    "end": 40,
    "loc": {
      "start": {
        "line": 1,
        "column": 25
      },
      "end": {
        "line": 1,
        "column": 40
      }
    },
    "body": [],
    "directives": [
      {
        "type": "Directive",
        "start": 26,
        "end": 39,
        "loc": {
          "start": {
            "line": 1,
            "column": 26
          },
          "end": {
            "line": 1,
            "column": 39
          }
        },
        "value": {
          "type": "DirectiveLiteral",
          "start": 26,
          "end": 38,
          "loc": {
            "start": {
              "line": 1,
              "column": 26
            },
            "end": {
              "line": 1,
              "column": 38
            }
          },
          "value": "use strict",
          "extra": {
            "raw": "\"use strict\"",
            "rawValue": "use strict"
          }
        }
      }
    ]
  },
  "errors": [
    "SyntaxError: Illegal 'use strict' directive in function with non-simple parameter list (1:0)"
  ]
}