[
  {
    "callStack": [
      {
        "line": 16,
        "column": 8,
        "sourceText": "throw \"err\"",
        "function": "f2a"
      },
      {
        "line": 28,
        "column": 8,
        "sourceText": "var p = f2a()",
        "function": "f2c"
      },
      {
        "line": 32,
        "column": 4,
        "sourceText": "f2c()",
        "function": "f2"
      },
      {
        "line": 34,
        "column": 0,
        "sourceText": "f2()",
        "function": "Global code"
      }
    ]
  },
  {
    "callStack": [
      {
        "line": 9,
        "column": 4,
        "sourceText": "throw new Error('error in f1')",
        "function": "f1"
      }
    ]
  }
]