From 01b5350bdcbe5c26f94f5fff9d72da955f56d7b3 Mon Sep 17 00:00:00 2001
From: Simon Ser <contact@emersion.fr>
Date: Tue, 5 Nov 2019 18:31:41 +0100
Subject: [PATCH] Fix segfault in set_mode

best is NULL prior to being assigned to a mode.

Closes: https://github.com/swaywm/sway/issues/4705
Fixes: f33dcd4c604f ("Prefer higher refresh rate default modes")
---
 sway/config/output.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sway/config/output.c b/sway/config/output.c
index 6c716ccb..a30d7954 100644
--- a/sway/config/output.c
+++ b/sway/config/output.c
@@ -222,7 +222,9 @@ static bool set_mode(struct wlr_output *output, int width, int height,
 				best = mode;
 				break;
 			}
-			best = mode->refresh > best->refresh ? mode : best;
+			if (best == NULL || mode->refresh > best->refresh) {
+				best = mode;
+			}
 		}
 	}
 	if (!best) {