From 88013bbdab331961fd4aae04b9637cc94e9f1998 Mon Sep 17 00:00:00 2001
From: Alice Mikhaylenko <alicem@gnome.org>
Date: Sun, 24 Sep 2023 15:21:43 +0400
Subject: [PATCH] header-bar: Add a precondition to track_default_decoration()

---
 gtk/gtkheaderbar.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gtk/gtkheaderbar.c b/gtk/gtkheaderbar.c
index b0c0963254..c5fbbf5744 100644
--- a/gtk/gtkheaderbar.c
+++ b/gtk/gtkheaderbar.c
@@ -229,6 +229,8 @@ update_default_decoration (GtkHeaderBar *bar)
 void
 _gtk_header_bar_track_default_decoration (GtkHeaderBar *bar)
 {
+  g_assert (GTK_IS_HEADER_BAR (bar));
+
   bar->track_default_decoration = TRUE;
 
   update_default_decoration (bar);
-- 
2.30.2