From 1f74f8d2c188a39c2c8c46b01921e6569cb4fc81 Mon Sep 17 00:00:00 2001
From: Orestis Floros <orestisf1993@gmail.com>
Date: Mon, 30 Apr 2018 03:54:38 +0300
Subject: [PATCH] Fix: ConfigureNotify can crash i3 with fake-outputs

handle_screen_change() and handle_configure_notify() call
randr_query_outputs() where root_output is not initialized because
randr_init() is never called when config.fake_outputs is not NULL.
---
 src/randr.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/randr.c b/src/randr.c
index d7e1acca..d4d7402a 100644
--- a/src/randr.c
+++ b/src/randr.c
@@ -856,8 +856,9 @@ void randr_query_outputs(void) {
     /* If there's no randr output, enable the output covering the root window. */
     if (any_randr_output_active()) {
         DLOG("Active RandR output found. Disabling root output.\n");
-        if (root_output->active)
+        if (root_output && root_output->active) {
             root_output->to_be_disabled = true;
+        }
     } else {
         DLOG("No active RandR output found. Enabling root output.\n");
         root_output->active = true;