Confusion about re-throwing an exception

[jmagaram]

I'm trying to catch and work with an Error, but don't know for sure what I'm receiving in the exception. If I test using Error.fromException and that fails and returns None I want to throw it again, but I can't. I need to use the OCaml raise function which seems to be available to me. Maybe the type of Error.raise needs to be loosened? Do we need an Error.raiseAny?

let f = () => {
  try {
    Console.log("do things")
  } catch {
  | _ as e =>
    switch e->Error.fromException {
    | Some(x) => Console.log("Handled!")
    | None => Error.raise(e) // Compile error, expects an Error.t
    | None => raise(e) // Works!
    }
  }
}