diff options
Diffstat (limited to 'lisp')
| -rw-r--r-- | lisp/newcomment.el | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lisp/newcomment.el b/lisp/newcomment.el index 9f0aeabe21f..1c9c0dfd4b6 100644 --- a/lisp/newcomment.el +++ b/lisp/newcomment.el @@ -251,8 +251,10 @@ this function before any other, so the rest of the code can assume that the variables are properly set." (unless (and (not comment-start) noerror) (unless comment-start - (set (make-local-variable 'comment-start) - (read-string "No comment syntax is defined. Use: "))) + (let ((cs (read-string "No comment syntax is defined. Use: "))) + (if (zerop (length cs)) + (error "No comment syntax defined") + (set (make-local-variable 'comment-start) cs)))) ;; comment-use-syntax (when (eq comment-use-syntax 'undecided) (set (make-local-variable 'comment-use-syntax) |