rb_id_serial_to_id: return unregistered ID as an internal ID

```ruby
def foo(*); ->{ super }; end
```

This code makes anonymous parameters which is not registered as an
ID.  The problem is that when Ractors try to scan `getlocal`
instructions, it puts the Symbol corresponding to the parameter
in to a hash.  Since it is not registered, we end up with a
strange exception.  This commit wraps the unregistered ID in an
internal ID so that we get the same exception for `...` as `*`.

Co-Authored-By: Aaron Patterson <tenderlove@ruby-lang.org>
Co-Authored-By: John Hawthorn <john@hawthorn.email>

0 files changed, 0 insertions, 0 deletions