{
  "description": "An input outside the function's domain is an error the student can fix",
  "calls": {
    "handle_set_function": {
      "args": {
        "expression": "log(x)"
      },
      "result": {
        "inputs": [
          "x"
        ],
        "constants": {},
        "nodes": [
          {
            "id": "w1",
            "kind": "input",
            "name": "x"
          },
          {
            "id": "w2",
            "kind": "op",
            "op": "log",
            "args": [
              "w1"
            ]
          }
        ],
        "output": "w2"
      }
    },
    "handle_set_run": {
      "args": {
        "mode": "reverse",
        "inputs": {
          "x": -1
        }
      },
      "error": {
        "kind": "user",
        "message": "log(-1) has no finite value"
      }
    }
  }
}