clean fds then exec, workaround https://bugs.ruby-lang.org/issues/8594

clean-rd-run.rb

#!/usr/bin/env ruby
#
def clean_fds
  # Don't clean $stdin, $stdout, $stderr, process_status_pipe.
  3.upto(256) do |n|
    begin
      fd = File.for_fd(n)
      fd.close if fd
    rescue
    end
  end
end

clean_fds
exec(ARGV.join(" "))