Panic for `extend self` in anonymous module

[Earlopain]

ruby-spec has some code like this:

Module.new do
  extend self
end

Rubydex panics at the following location when trying to unwrap None

rubydex/rust/rubydex/src/indexing/ruby_indexer.rs

Line 985 in ff695e4

self.current_lexical_scope_name_id().unwrap(),