module Kernel

def silence_stream(stream)

This method is not thread-safe.

puts 'But this will'

end
puts 'This will never be seen'
silence_stream(STDOUT) do

Silences any stream for the duration of the block.
Deprecated : this method is not thread safe 
def silence_stream(stream)
  old_stream = stream.dup
  stream.reopen(RbConfig::CONFIG['host_os'] =~ /mswin|mingw/ ? 'NUL:' : '/dev/null')
  stream.sync = true
  yield
ensure
  stream.reopen(old_stream)
  old_stream.close
end