From: Spencer Baugh <sbaugh@janestreet.com>
Date: Fri, 10 Nov 2023 16:27:10 +0000 (-0500)
Subject: Don't infinite loop in map-y-or-n-p if at the end of kmacro
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=7cfe088bc35f14391014b4f93a784fdef412da9c;p=emacs.git

Don't infinite loop in map-y-or-n-p if at the end of kmacro

Previously, if map-y-or-n-p got -1 from read-event (indicating no
input due to the end of a keyboard macro), it would just infinite
loop.

Now it behaves like other commands which use read-event/read-char/etc,
and just errors when we try to look up -1 in our keymap and find
nothing.

Also, just for the sake of users, print a slightly prettier message
when this happens.

* lisp/emacs-lisp/map-ynp.el (map-y-or-n-p): Don't loop if we reach
the end of a keyboard macro.  (Bug#67046)
---

diff --git a/lisp/emacs-lisp/map-ynp.el b/lisp/emacs-lisp/map-ynp.el
index cb1cc88e78f..fffb199e2ea 100644
--- a/lisp/emacs-lisp/map-ynp.el
+++ b/lisp/emacs-lisp/map-ynp.el
@@ -168,16 +168,14 @@ The function's value is the number of actions taken."
 				(key-description (vector help-char)))
 		       (if minibuffer-auto-raise
 			   (raise-frame (window-frame (minibuffer-window))))
-		       (while (progn
-				(setq char (read-event))
-				;; If we get -1, from end of keyboard
-				;; macro, try again.
-                                (equal char -1)))
+		       (setq char (read-event))
 		       ;; Show the answer to the question.
 		       (message "%s(y, n, !, ., q, %sor %s) %s"
 				prompt user-keys
 				(key-description (vector help-char))
-				(single-key-description char)))
+				(if (equal char -1)
+                                    "[end-of-keyboard-macro]"
+                                  (single-key-description char))))
 		     (setq def (lookup-key map (vector char))))
 		   (cond ((eq def 'exit)
 			  (setq next (lambda () nil)))