Class method const lookup issue

[seven1m]

Another issue to document as I work through #2269 and #2492, but different enough I want to track it separately:

class Foo
  VAL = :a

  class << self
    VAL = :b

    def val1
      VAL
    end
  end

  def self.val2
    VAL
  end
end

p Foo.val1 # => :b
p Foo.val2 # => :a

With Natalie, this produces:

:a
:a