Where do I report this bug?

Only happens on windows platform:

causes some error ot lock that doesnt occur on Unices

require \'socket\'
require \'thread\'
 
sock = TCPSocket.new(\'ancient.anguish.org\',2222) # login name is :
guest (no password needed)
 
t1 = Thread.new do
if line = gets
sock.write line
end
end
 
t2 = Thread.new do
loop do 
ch = sock.recv(1)
putc ch
end
end
  
 t1.join
 t2.join

Thanks

Kingsley