{
  "graph": null,
  "err": {
    "ioerr": null,
    "errs": [
      {
        "range": "d2/testdata/d2compiler/TestCompile/link-board-underscore-not-found.d2,6:8:59-6:18:69",
        "errmsg": "d2/testdata/d2compiler/TestCompile/link-board-underscore-not-found.d2:7:9: invalid underscore usage"
      }
    ]
  }
}