安装el-get说明如下：
;; Copy/paste this code into your *scratch* buffer,
;; hit C-j, and you have a working el-get.
(url-retrieve
"https://raw.github.com/dimitri/el-get/master/el-get-install.el"
(lambda (s)
(goto-char (point-max))
(eval-print-last-sexp)))
当我这样做时，会*Backtrace*打开一个名为的缓冲区，debugger-mode其中包含以下内容：
Debugger entered--Lisp error: (void-variable closed)
eval(closed nil)
eval-last-sexp-1(t)
eval-last-sexp(t)
eval-print-last-sexp()
(lambda (s) (goto-char (point-max)) (eval-print-last-sexp))(nil)
apply((lambda (s) (goto-char (point-max)) (eval-print-last-sexp)) nil)
url-http-activate-callback()
url-http-content-length-after-change-function(589 3952 3363)
url-http-generic-filter(#<process raw.github.com> ";;; el-get-install.el --- installer for the lazy
;;
;; Copyright (C) 2010 Dimitri Fontaine
;;
;; Author: Dimitri Fontaine <dim@tapoueh.org>
;; URL: http://www.emacswiki.org/emacs/el-get.el
;; Created: 2010-06-17
;; Keywords: emacs package elisp install elpa git git-svn bzr cvs apt-get fink http http-tar
;; Licence: WTFPL, grab your copy here: http://sam.zoy.org/wtfpl/
;;
;; This file is NOT part of GNU Emacs.
;;
;; bootstrap your el-get installation, the goal is then to use el-get to
;; update el-get.
;;
;; So the idea is that you copy/paste this code into your *scratch* buffer,
;; hit C-j, and you have a working el-get.
(let ((el-get-root
(file-name-as-directory
(or (bound-and-true-p el-get-dir)
(concat (file-name-as-directory user-emacs-directory) \"el-get\")))))
(when (file-directory-p el-get-root)
(add-to-list 'load-path el-get-root))
;; try to require el-get, failure means we have to install it
(unless (require 'el-get nil t)
(unless (file-directory-p el-get-root)
(make-directory el-get-root t))
(let* ((package \"el-get\")
(buf (switch-to-buffer \"*el-get bootstrap*\"))
(pdir (file-name-as-directory (concat el-get-root package)))
(git (or (executable-find \"git\")
(error \"Unable to find `git'\")))
(url (or (bound-and-true-p el-get-git-install-url)
\"http://github.com/dimitri/el-get.git\"))
(default-directory el-get-root)
(process-connection-type nil) ; pipe, no pty (--no-progress)
;; First clone el-get
(status
(call-process
git nil `(,buf t) t \"--no-pager\" \"clone\" \"-v\" url package)))
(unless (zerop status)
(error \"Couldn't clone el-get from the Git repository: %s\" url))
;; switch branch if we have to
(let* ((branch (cond
;; Check if a specific branch is requested
((bound-and-true-p el-get-install-branch))
;; Check if master branch is requested
((boundp 'el-get-master-branch) \"master\")
;; Read the default branch from the el-get recipe
((plist-get (with-temp-buffer
(insert-file-contents-literally
(expand-file-name \"recipes/el-get.rcp\" pdir))
(read (current-buffer)))
:branch))
;; As a last resort, use the master branch
(\"master\")))
(remote-branch (format \"origin/%s\" branch))
(default-directory pdir)
(bstatus
(if (string-equal branch \"master\")
0
(call-process git nil (list buf t) t \"checkout\" \"-t\" remote-branch))))
(unless (zerop bstatus)
(error \"Couldn't `git checkout -t %s`\" branch)))
(add-to-list 'load-path pdir)
(load package)
(let ((el-get-default-process-sync t) ; force sync operations for installer
(el-get-verbose t)) ; let's see it all
(el-get-post-install \"el-get\"))
(unless (boundp 'el-get-install-skip-emacswiki-recipes)
(el-get-emacswiki-build-local-recipes))
(with-current-buffer buf
(goto-char (point-max))
(insert \"\
Congrats, el-get is installed and ready to serve!\")))))
closed
")
我是否认为文件中有错误https://raw.github.com/dimitri/el-get/master/el-get-install.el？还是我必须设置其他任何东西才能使这样的脚本正常工作？