I think we should keep `null` as `no message set` as before.

I think we should keep `null` as `no message set` as before.

```suggestion
  if (message == null) {
```

_Originally posted by @BridgeAR in https://github.com/nodejs/node/pull/58532#discussion_r2118436011_