From: Eli Zaretskii <eliz@gnu.org>
Date: Sat, 17 Aug 2024 18:35:08 +0000 (+0300)
Subject: Avoid rare crashes due to clobbering of input events
X-Git-Tag: archive/raspbian/1%30.1+1-3+rpi1^2~2^2~20^2~544
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=9e7c2d3816ec3e1247b1bd3cfcafc60a84b0f5ec;p=emacs.git

Avoid rare crashes due to clobbering of input events

* src/keyboard.c (read_char): Declare C 'volatile', to prevent
clobbering it by setjmp/longjmp.  Do not merge to master.
(Bug#71744)
---

diff --git a/src/keyboard.c b/src/keyboard.c
index c75e80d2a05..e7b0af9f63c 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -2522,7 +2522,7 @@ read_char (int commandflag, Lisp_Object map,
 	   Lisp_Object prev_event,
 	   bool *used_mouse_menu, struct timespec *end_time)
 {
-  Lisp_Object c;
+  volatile Lisp_Object c;
   sys_jmp_buf local_getcjmp;
   sys_jmp_buf save_jump;
   Lisp_Object tem, save;