rbx open_timeout woes

mri

$ ruby -v
ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin11.4.2]
$ time ruby open_timeout.rb
/Users/michaelfairley/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/net/http.rb:762:in `initialize': execution expired (Timeout::Error)
  from /Users/michaelfairley/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/net/http.rb:762:in `open'
	from /Users/michaelfairley/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/net/http.rb:762:in `block in connect'
	from /Users/michaelfairley/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/net/http.rb:762:in `connect'
	from /Users/michaelfairley/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/net/http.rb:755:in `do_start'
	from /Users/michaelfairley/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/net/http.rb:744:in `start'
	from /Users/michaelfairley/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/net/http.rb:1284:in `request'
	from /Users/michaelfairley/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/net/http.rb:1195:in `request_get'
	from open_timeout.rb:5:in `<main>'

real	0m1.328s
user	0m0.076s
sys	0m0.037s

open_timeout.rb

require 'net/http'

http = Net::HTTP.new("192.0.2.1", "80")
http.open_timeout = 1
http.request_get("/")

rbx

$ ruby -v
rubinius 2.0.0rc1 (1.9.3 release 2012-11-02 JI) [x86_64-apple-darwin11.4.2]
$ uname -a
Darwin veritas.local 11.4.2 Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64 x86_64
$ rbenv -v
rbenv 0.4.0
$ ruby-build --version
ruby-build 20130628
$ time ruby open_timeout.rb
An exception occurred running open_timeout.rb
    execution expired (Timeout::Error)

Backtrace:
           FFI::MemoryPointer#free at kernel/platform/pointer.rb:446
            FFI::MemoryPointer.new at kernel/platform/pointer.rb:309
           Socket::Foreign.connect at /Users/michaelfairley/.rbenv/versions/rbx-2.0.0-rc1/lib/19/socket.rb:251
        { } in TCPSocket#tcp_setup at /Users/michaelfairley/.rbenv/versions/rbx-2.0.0-rc1/lib/19/socket.rb:1101
                        Array#each at kernel/bootstrap/array.rb:68
               TCPSocket#tcp_setup at /Users/michaelfairley/.rbenv/versions/rbx-2.0.0-rc1/lib/19/socket.rb:1060
              TCPSocket#initialize at /Users/michaelfairley/.rbenv/versions/rbx-2.0.0-rc1/lib/19/socket.rb:1032
                         Class#new at kernel/alpha.rb:96
                           IO.open at kernel/common/io.rb:250
          { } in Net::HTTP#connect at /Users/michaelfairley/.rbenv/versions/rbx-2.0.0-rc1/lib/19/net/http.rb:762
                   Timeout.timeout at /Users/michaelfairley/.rbenv/versions/rbx-2.0.0-rc1/lib/19/timeout.rb:149
         Object(Net::HTTP)#timeout at /Users/michaelfairley/.rbenv/versions/rbx-2.0.0-rc1/lib/19/timeout.rb:168
                 Net::HTTP#connect at /Users/michaelfairley/.rbenv/versions/rbx-2.0.0-rc1/lib/19/net/http.rb:762
                Net::HTTP#do_start at /Users/michaelfairley/.rbenv/versions/rbx-2.0.0-rc1/lib/19/net/http.rb:755
                   Net::HTTP#start at /Users/michaelfairley/.rbenv/versions/rbx-2.0.0-rc1/lib/19/net/http.rb:744
                 Net::HTTP#request at /Users/michaelfairley/.rbenv/versions/rbx-2.0.0-rc1/lib/19/net/http.rb:1284
             Net::HTTP#request_get at /Users/michaelfairley/.rbenv/versions/rbx-2.0.0-rc1/lib/19/net/http.rb:1195
                 Object#__script__ at open_timeout.rb:5
  Rubinius::CodeLoader#load_script at kernel/delta/codeloader.rb:68
  Rubinius::CodeLoader.load_script at kernel/delta/codeloader.rb:118
           Rubinius::Loader#script at kernel/loader.rb:614
             Rubinius::Loader#main at kernel/loader.rb:815

real  1m16.394s
user	0m0.331s
sys	0m0.047s