File::makedirs stack err, win32 1.8.0-pre3

Obtuse case, I know, but an error nonetheless:

Microsoft Windows 2000 [Version 5.00.2195]
(C) Copyright 1985-2000 Microsoft Corp.

S:\>irb
irb(main):001:0> VERSION
=> "1.8.0"
irb(main):002:0> require 'ftools'
=> true
irb(main):003:0> File::makedirs('//')
SystemStackError: stack level too deep
        from c:/ruby/lib/ruby/1.8/ftools.rb:134:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `each'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:136:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `each'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:136:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `each'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:136:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `each'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:136:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `each'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:136:in `makedirs'
... 1772 levels...
        from c:/ruby/lib/ruby/1.8/ftools.rb:136:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `each'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:136:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `each'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:136:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `each'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:136:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `each'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:136:in `makedirs'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `each'
        from c:/ruby/lib/ruby/1.8/ftools.rb:133:in `makedirs'
        from (irb):3irb(main):004:0>
···

Chris
http://clabs.org/blogki
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