请问为什么这个语句会出错 safari applescript

[ddqp]

之前都还是好好的,升级到 10.12.4 Beta 就出错了,错在 "URL of front document" 中的 URL 这个变量. 本人小白, 大神请轻喷.

on run {theURL, parameters}

-- Copies URL of the current tab to the clipboard
-- Requires Alfred PowerPack
tell application "Safari"
	set theURL to URL of front document
	set the clipboard to theURL as string
end tell

set input02 to (theURL as text)
#do shell script "/usr/local/bin/you-get -p /usr/local/bin/mpv ' input02' &"
do shell script ("/usr/local/bin/you-get -p /usr/local/bin/mpv '" & input02 & "'")

return theURL

end run