From ffe6655cba7dfc4cc559190151a45b8e497502dc Mon Sep 17 00:00:00 2001
From: nicm <nicm@openbsd.org>
Date: Wed, 10 Apr 2024 07:15:21 +0000
Subject: [PATCH] Do not get muddled and crash if focusing a pane that is
 exiting, reported by Saul Nogueras in GitHub issue 3776.

---
 usr.bin/tmux/window.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/usr.bin/tmux/window.c b/usr.bin/tmux/window.c
index 3d4361a4a12..e9a9a1ef202 100644
--- a/usr.bin/tmux/window.c
+++ b/usr.bin/tmux/window.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: window.c,v 1.289 2024/03/21 11:30:42 nicm Exp $ */
+/* $OpenBSD: window.c,v 1.290 2024/04/10 07:15:21 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -474,7 +474,7 @@ window_pane_update_focus(struct window_pane *wp)
 	struct client	*c;
 	int		 focused = 0;
 
-	if (wp != NULL) {
+	if (wp != NULL && (~wp->flags & PANE_EXITED)) {
 		if (wp != wp->window->active)
 			focused = 0;
 		else {
-- 
2.20.1