Raise 'wrong-type-argument' when installing package nil

* lisp/emacs-lisp/package-vc.el (package-vc-install): Check if the
package is nil.

diff --git a/lisp/emacs-lisp/package-vc.el b/lisp/emacs-lisp/package-vc.el
index 62724d398c13dc6778a11f673c77187a51a4a563..36d17c6116bfca95308a378892937d63319337f4 100644 (file)
--- a/lisp/emacs-lisp/package-vc.el
+++ b/lisp/emacs-lisp/package-vc.el
@@ -648,6 +648,8 @@ uses `package-vc-heuristic-alist' to guess the backend."
              (and current-prefix-arg :last-release)))))
   (package-vc--archives-initialize)
   (cond
+   ((null name-or-url)
+    (signal 'wrong-type-argument nil))
    ((and-let* (((stringp name-or-url))
                (backend (or backend (package-vc--guess-backend name-or-url))))
       (package-vc--unpack