```ruby
# thanks _why
# http://whytheluckystiff.net/articles/seeingMetaclassesClearly.html
class Object
  # The hidden singleton lurks behind everyone
  def metaclass; class << self; self; end; end
  def meta_eval &blk; metaclass.instance_eval &blk; end

  # Adds methods to a metaclass
  def meta_def name, &blk
    meta_eval { define_method name, &blk }
  end

  # Defines an instance method within a class
  def class_def name, &blk
    class_eval { define_method name, &blk }
  end
end```

Apply the same fix in SHA: 61457e1c1b
user
```ruby
# thanks _why
# http://whytheluckystiff.net/articles/seeingMetaclassesClearly.html
class Object
  # The hidden singleton lurks behind everyone
  def metaclass; class << self; self; end; end
  def meta_eval &blk; metaclass.instance_eval &blk; end

  # Adds methods to a metaclass
  def meta_def name, &blk
    meta_eval {
      define_method(name) {|*args, &block|
        blk.call(*args, &block)
      }
    }
  end

  # Defines an instance method within a class
  def class_def name, &blk
    class_eval { define_method name, &blk }
  end
end```
assistant