Postmodern created JRUBY-6574:
---------------------------------

             Summary: Socket#bind does not convert nil to 0
                 Key: JRUBY-6574
                 URL: https://jira.codehaus.org/browse/JRUBY-6574
             Project: JRuby
          Issue Type: Bug
          Components: Standard Library
    Affects Versions: JRuby 1.6.7
         Environment: jruby 1.6.7 (ruby-1.8.7-p357) (2012-02-22 3e82bc8) 
(OpenJDK 64-Bit Server VM 1.6.0_24) [linux-amd64-java]
            Reporter: Postmodern
            Assignee: Thomas E Enebo


`Socket#bind` does not accept `nil` for the local port to bind to. Both MRI 
1.8.7 and Rubinius seem to convert a `nil` port value to `0`.

Reproduction:

{code}
require 'socket'
socket = UDPSocket.new
socket.bind('localhost',nil)
{code}

Expected Results:

{code}
# => 0
{code}

Actual Results:

{noformat}
TypeError: no implicit conversion from nil to integer
        from org/jruby/ext/socket/RubyUDPSocket.java:131:in `bind'
        from (irb):3:in `evaluate'
        from org/jruby/RubyKernel.java:1083:in `eval'
        from /home/hal/.rvm/rubies/jruby-1.6.7/lib/ruby/1.8/irb.rb:158:in 
`eval_input'
        from /home/hal/.rvm/rubies/jruby-1.6.7/lib/ruby/1.8/irb.rb:271:in 
`signal_status'
        from /home/hal/.rvm/rubies/jruby-1.6.7/lib/ruby/1.8/irb.rb:155:in 
`eval_input'
        from org/jruby/RubyKernel.java:1410:in `loop'
        from org/jruby/RubyKernel.java:1183:in `catch'
        from /home/hal/.rvm/rubies/jruby-1.6.7/lib/ruby/1.8/irb.rb:154:in 
`eval_input'
        from /home/hal/.rvm/rubies/jruby-1.6.7/lib/ruby/1.8/irb.rb:71:in `start'
        from org/jruby/RubyKernel.java:1183:in `catch'
        from /home/hal/.rvm/rubies/jruby-1.6.7/lib/ruby/1.8/irb.rb:70:in `start'
        from /home/hal/.rvm/rubies/jruby-1.6.7/bin/irb:17:in `(root)'
{noformat}

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