<test foo />
---
{}
---
{
  "val": null,
  "err": {
    "kind": 23,
    "message": "<test foo />",
    "location": {
      "start": {
        "offset": 0,
        "line": 1,
        "column": 1
      },
      "end": {
        "offset": 6,
        "line": 1,
        "column": 7
      }
    }
  }
}