ruby_2.3.3_linux.txt

vagrant@vagrant-ubuntu-trusty-64:/vagrant$ ruby hoge.rb 
{:here=>"rescue", :closed=>true, :error=>#<IOError: stream closed>}
vagrant@vagrant-ubuntu-trusty-64:/vagrant$ ruby -e 'puts RUBY_VERSION'
2.3.3
vagrant@vagrant-ubuntu-trusty-64:/vagrant$ ruby -v
ruby 2.3.3p222 (2016-11-21 revision 56859) [x86_64-linux-gnu]

ruby_2.4.0_linux.txt

vagrant@vagrant-ubuntu-trusty-64:/vagrant$ ruby -v
ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-linux]
vagrant@vagrant-ubuntu-trusty-64:/vagrant$ ruby hoge.rb 
{:here=>"rescue", :closed=>true, :error=>#<IOError: stream closed>}

ruby_2.4.0_osx.txt

MBA:fluentd tagomoris$ ruby -v
ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-darwin15]
MBA:fluentd tagomoris$ ruby hoge.rb 
{:here=>"rescue", :closed=>true, :error=>#<Errno::EBADF: Bad file descriptor>}

ruby_2.5.0_linux.txt

vagrant@vagrant-ubuntu-trusty-64:/vagrant$ ruby -v
ruby 2.5.0dev (2017-01-25 trunk 57420) [x86_64-linux]
vagrant@vagrant-ubuntu-trusty-64:/vagrant$ ruby hoge.rb 
{:here=>"rescue", :closed=>false, :error=>#<IOError: stream closed>}

ruby_2.5.0_osx.txt

MBA:fluentd tagomoris$ ruby -v
ruby 2.5.0dev (2017-01-24 trunk 57413) [x86_64-darwin15]
MBA:fluentd tagomoris$ ruby hoge.rb 
{:here=>"rescue", :closed=>true, :error=>#<Errno::EBADF: Bad file descriptor>}

simple_unix_server.rb

require 'socket'

server = UNIXServer.new('/tmp/yaaaay')
thread = Thread.new do
  begin
    while sock = server.accept
      p(here: "accepted", sock: sock)
      sock.close rescue nil
    end
  rescue => e
    p(here: "rescue", closed: server.closed?, error: e)
  end
end

sleep 1

server.close

sleep 1

File.delete('/tmp/yaaaay')