From d1f58218b350d7719e4e9720ab5599c23e4b101d Mon Sep 17 00:00:00 2001
From: dvh <vinnyhorgan@gmail.com>
Date: Wed, 11 Nov 2026 10:07:32 +0100
Subject: [PATCH] fix a crash in focusmon() when no monitor is enabled

closemon() sets selmon to NULL when every output is disabled (e.g. turned
off with wlr-randr), and dirtomon() dereferences it.
---
 dwl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dwl.c b/dwl.c
index 921f353..259ebab 100644
--- a/dwl.c
+++ b/dwl.c
@@ -1702,6 +1702,8 @@ void
 focusmon(const Arg *arg)
 {
 	int i = 0, nmons = wl_list_length(&mons);
+	if (!selmon)
+		return;
 	if (nmons) {
 		do /* don't switch to disabled mons */
 			selmon = dirtomon(arg->i);