class Crash < RuntimeError
  def backtrace
    IO.readlines($0)
  end
end

puts 'Wait for it. Starting in 0.5 sec. Once the dots stop, kill the process with SIGKILL.'
sleep 0.5

loop do
  begin
    raise Crash.new 'boo!'
  rescue => e
    putc '.'
  ensure
  end
end