古いVimだと動くけど、最新のVimだと動かない

pythread.vim

echomsg 'begin'

python <<EOF
# coding: utf-8
import thread
import time

def func():
    for i in range(0, 10):
        print i
        time.sleep(1)

thread.start_new_thread(func, ())
EOF

echomsg 'end'

rbthread.vim

echomsg 'begin'

ruby <<EOF
Thread.new do
    10.times do |i|
        puts i
        sleep 1
    end
end
EOF

echomsg 'end'