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>

1 files changed, 28 insertions, 0 deletions

diff --git a/test/ruby/test_iseq.rb b/test/ruby/test_iseq.rb
index 3a02c182aa..19357a774d 100644
--- a/test/ruby/test_iseq.rb
+++ b/test/ruby/test_iseq.rb
@@ -95,6 +95,26 @@ class TestISeq < Test::Unit::TestCase
     assert_equal(42, ISeq.load_from_binary(iseq.to_binary).eval)
   end
 
+  def test_super_with_block
+    iseq = compile(<<~EOF)
+      def touch(*) # :nodoc:
+        foo { super }
+      end
+      42
+    EOF
+    assert_equal(42, ISeq.load_from_binary(iseq.to_binary).eval)
+  end
+
+  def test_super_with_block_and_kwrest
+    iseq = compile(<<~EOF)
+      def touch(**) # :nodoc:
+        foo { super }
+      end
+      42
+    EOF
+    assert_equal(42, ISeq.load_from_binary(iseq.to_binary).eval)
+  end
+
   def test_lambda_with_ractor_roundtrip
     iseq = compile(<<~EOF)
       x = 42
@@ -340,6 +360,14 @@ class TestISeq < Test::Unit::TestCase
     end
   end
 
+  def anon_star(*); end
+
+  def test_anon_param_in_disasm
+    iseq = RubyVM::InstructionSequence.of(method(:anon_star))
+    param_names = iseq.to_a[iseq.to_a.index(:method) + 1]
+    assert_equal [2], param_names
+  end
+
   def strip_lineno(source)
     source.gsub(/^.*?: /, "")
   end