错误类型参数:字符串，无黏液安装

Question

我正在尝试安装并安装GNU中的黏液，方法是遵循SLIME页面中的快速安装。https://github.com/slime/slime

我已经遵循了设置MELPA存储库链接的说明，该链接要求您将代码添加到.emacs文件中。下面是我的.emacs文件中的代码：

;; Added by Package.el.  This must come before configurations of
;; installed packages.  Don't delete this line.  If you don't want it,
;; just comment it out by adding a semicolon to the start of the line.
;; You may delete these explanatory comments.
(require 'package)
(let* ((no-ssl (and (memq system-type '(windows-nt ms-dos))
                    (not (gnutls-available-p))))
       (proto (if no-ssl "http" "https")))
  ;; Comment/uncomment these two lines to enable/disable MELPA and MELPA Stable as desired
  (add-to-list 'package-archives (cons "melpa" (concat proto "://melpa.org/packages/")) t)
  ;;(add-to-list 'package-archives (cons "melpa-stable" (concat proto "://stable.melpa.org/packages/")) t)
  (when (< emacs-major-version 24)
    ;; For important compatibility libraries like cl-lib
    (add-to-list 'package-archives '("gnu" . (concat proto "://elpa.gnu.org/packages/")))))
(package-initialize)

;; Set your lisp system and, optionally, some contribs
(setq inferior-lisp-program "/opt/sbcl/bin/sbcl")
(setq slime-contribs '(slime-fancy))

(custom-set-variables
 ;; custom-set-variables was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 '(ansi-color-faces-vector
   [default default default italic underline success warning error])
 '(ansi-color-names-vector
   ["#073642" "#dc322f" "#859900" "#b58900" "#268bd2" "#d33682" "#2aa198" "#657b83"])
 '(compilation-message-face (quote default))
 '(cua-global-mark-cursor-color "#2aa198")
 '(cua-normal-cursor-color "#839496")
 '(cua-overwrite-cursor-color "#b58900")
 '(cua-read-only-cursor-color "#859900")
 '(custom-enabled-themes (quote (deeper-blue)))
 '(custom-safe-themes
   (quote
    ("8aebf25556399b58091e533e455dd50a6a9cba958cc4ebb0aab175863c25b9a4" default)))
 '(fci-rule-color "#073642")
 '(highlight-changes-colors (quote ("#d33682" "#6c71c4")))
 '(highlight-symbol-colors
   (--map
    (solarized-color-blend it "#002b36" 0.25)
    (quote
     ("#b58900" "#2aa198" "#dc322f" "#6c71c4" "#859900" "#cb4b16" "#268bd2"))))
 '(highlight-symbol-foreground-color "#93a1a1")
 '(highlight-tail-colors
   (quote
    (("#073642" . 0)
     ("#546E00" . 20)
     ("#00736F" . 30)
     ("#00629D" . 50)
     ("#7B6000" . 60)
     ("#8B2C02" . 70)
     ("#93115C" . 85)
     ("#073642" . 100))))
 '(hl-bg-colors
   (quote
    ("#7B6000" "#8B2C02" "#990A1B" "#93115C" "#3F4D91" "#00629D" "#00736F" "#546E00")))
 '(hl-fg-colors
   (quote
    ("#002b36" "#002b36" "#002b36" "#002b36" "#002b36" "#002b36" "#002b36" "#002b36")))
 '(magit-diff-use-overlays nil)
 '(package-archives (quote (("gnu" . "http://elpa.gnu.org/packages/"))))
 '(package-selected-packages (quote (slime solarized-theme)))
 '(pos-tip-background-color "#073642")
 '(pos-tip-foreground-color "#93a1a1")
 '(smartrep-mode-line-active-bg (solarized-color-blend "#859900" "#073642" 0.2))
 '(term-default-bg-color "#002b36")
 '(term-default-fg-color "#839496")
 '(vc-annotate-background nil)
 '(vc-annotate-color-map
   (quote
    ((20 . "#dc322f")
     (40 . "#c85d17")
     (60 . "#be730b")
     (80 . "#b58900")
     (100 . "#a58e00")
     (120 . "#9d9100")
     (140 . "#959300")
     (160 . "#8d9600")
     (180 . "#859900")
     (200 . "#669b32")
     (220 . "#579d4c")
     (240 . "#489e65")
     (260 . "#399f7e")
     (280 . "#2aa198")
     (300 . "#2898af")
     (320 . "#2793ba")
     (340 . "#268fc6")
     (360 . "#268bd2"))))
 '(vc-annotate-very-old-color nil)
 '(weechat-color-list
   (quote
    (unspecified "#002b36" "#073642" "#990A1B" "#dc322f" "#546E00" "#859900" "#7B6000" "#b58900" "#00629D" "#268bd2" "#93115C" "#d33682" "#00736F" "#2aa198" "#839496" "#657b83"))))
(custom-set-faces
 ;; custom-set-faces was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 )

接下来，我在GitHub页面上运行以下命令并尝试下载SLIME：

M-x package-install RET slime RET

当我执行上面的命令时，我会得到以下错误：

错误类型参数:字符串，零

有人知道我为什么会犯这个错误或如何解决这个问题吗？我正在运行GNUEmacs25.2.2(x86_64-，GTK+版本3.22.21)，操作系统是Ubuntu18.04.1LTS。任何帮助都将不胜感激。

编辑:添加回溯-

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  string-match("\\`https?:" nil nil)
  package-install-from-archive([cl-struct-package-desc slime (2 22) "Superior Lisp Interaction Mode for Emacs" ((cl-lib (0 5)) (macrostep (0 9))) tar "melpa" nil ((:commit . "8d9fdf34fe542ec280ee042ee7bdea16e512d3c0") (:keywords "languages" "lisp" "slime") (:url . "https://github.com/slime/slime")) nil])
  mapc(package-install-from-archive ([cl-struct-package-desc slime (2 22) "Superior Lisp Interaction Mode for Emacs" ((cl-lib (0 5)) (macrostep (0 9))) tar "melpa" nil ((:commit . "8d9fdf34fe542ec280ee042ee7bdea16e512d3c0") (:keywords "languages" "lisp" "slime") (:url . "https://github.com/slime/slime")) nil]))
  package-download-transaction(([cl-struct-package-desc slime (2 22) "Superior Lisp Interaction Mode for Emacs" ((cl-lib (0 5)) (macrostep (0 9))) tar "melpa" nil ((:commit . "8d9fdf34fe542ec280ee042ee7bdea16e512d3c0") (:keywords "languages" "lisp" "slime") (:url . "https://github.com/slime/slime")) nil]))
  package-install(slime nil)
  funcall-interactively(package-install slime nil)
  call-interactively(package-install record nil)
  command-execute(package-install record)
  execute-extended-command(nil "package-install" "package-install")
  funcall-interactively(execute-extended-command nil "package-install" "package-install")
  call-interactively(execute-extended-command nil nil)
  command-execute(execute-extended-command)

Answer 1

同样的事情也发生在我安装不同的软件包时。M-x package-refresh-contents修好了。在重新启动之后，您可能每次都要运行这个程序包，并且尝试安装一个包。