From edffd820573a3b2cc5fb4015880d8ee19da58886 Mon Sep 17 00:00:00 2001
From: Maria Matejka <mq@ucw.cz>
Date: Thu, 27 Jun 2024 09:48:38 +0200
Subject: [PATCH] Config undo queuing bug fixed

---
 conf/conf.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/conf/conf.c b/conf/conf.c
index 77740bb8..9f259691 100644
--- a/conf/conf.c
+++ b/conf/conf.c
@@ -358,8 +358,16 @@ config_done(void)
   if (future_cftype)
     {
       int type = future_cftype;
+      struct config *fc = OBSREF_GET(future_config);
 
-      CONFIG_REF_LOCAL(conf, OBSREF_GET(future_config));
+      if (type == RECONFIG_UNDO)
+      {
+	ASSERT_DIE(!fc);
+	ASSERT_DIE(old_config);
+	fc = old_config;
+      }
+
+      CONFIG_REF_LOCAL(conf, fc);
 
       future_cftype = RECONFIG_NONE;
       OBSREF_CLEAR(future_config);