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-rw-r--r--lisp/emacs-lisp/tabulated-list.el4
1 files changed, 3 insertions, 1 deletions
diff --git a/lisp/emacs-lisp/tabulated-list.el b/lisp/emacs-lisp/tabulated-list.el
index 47ecd2b7922..4bd8a19937d 100644
--- a/lisp/emacs-lisp/tabulated-list.el
+++ b/lisp/emacs-lisp/tabulated-list.el
@@ -520,7 +520,9 @@ With a numeric prefix argument N, sort the Nth column."
(car (aref tabulated-list-format n))
(get-text-property (point)
'tabulated-list-column-name))))
- (tabulated-list--sort-by-column-name name)))
+ (if (nth 2 (assoc name (append tabulated-list-format nil)))
+ (tabulated-list--sort-by-column-name name)
+ (user-error "Cannot sort by %s" name))))
(defun tabulated-list--sort-by-column-name (name)
(when (and name (derived-mode-p 'tabulated-list-mode))