dyno: odd issue when calling `init` without `this`

The following program:

```Chapel
record R {
  var x: int;

  proc init(x: int) {

  }

  proc init(x: int, y: int) {
    init(__primitive("+", x, y));
  }
}
```

Emits an error about being unable to pass a `const int` to a value of type `ref R`. This makes little sense to me.