From 5932140d304ac7fd222e3404a507c15a44d026c6 Mon Sep 17 00:00:00 2001
From: nicm <nicm@openbsd.org>
Date: Fri, 2 Oct 2026 12:12:51 +0000
Subject: [PATCH] Do not use client for copy-mode -S if NULL, reported by
 Martin Vlach.

---
 cmd-copy-mode.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cmd-copy-mode.c b/cmd-copy-mode.c
index e6888ca7e..28a1a742e 100644
--- a/cmd-copy-mode.c
+++ b/cmd-copy-mode.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-copy-mode.c,v 1.54 2026/07/14 17:17:17 nicm Exp $ */
+/* $OpenBSD: cmd-copy-mode.c,v 1.55 2026/10/02 12:12:51 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -103,6 +103,8 @@ cmd_copy_mode_exec(struct cmd *self, struct cmdq_item *item)
 	if (args_has(args, 'd'))
 		window_copy_pagedown(wp, 0, args_has(args, 'e'));
 	if (args_has(args, 'S')) {
+		if (c == NULL)
+			return (CMD_RETURN_NORMAL);
 		tty_window_offset(&c->tty, &tty_ox, &tty_oy, &tty_sx, &tty_sy);
 		window_copy_scroll(wp, c->tty.mouse_slider_mpos, event->m.y,
 		    tty_oy, args_has(args, 'e'));