Pathname bug on Windows box?

--- test.rb ---
require 'pathname'
puts Pathname.new('.').realpath
--- test.rb ---

always produces:

c:/ruby/lib/ruby/1.8/pathname.rb:341:in `lstat': Invalid argument - /c:
(Errno::EINVAL)
  from c:/ruby/lib/ruby/1.8/pathname.rb:341:in `realpath'
  from test.rb:2

any ideas? seems like Pathname doesn't support windows at all?

where to submit this kind of bugs?

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