From: Alice Mikhaylenko <alicem@gnome.org>
Date: Sun, 24 Sep 2023 11:22:36 +0000 (+0400)
Subject: dialog: Check header bar type before calling track_default_decoration()
X-Git-Tag: archive/raspbian/4.12.4+ds-3+rpi1^2~21^2~1^2~19
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=60d0213ce03a3c9491546ff8290d6560eb17b77f;p=gtk4.git

dialog: Check header bar type before calling track_default_decoration()

Fixes https://gitlab.gnome.org/GNOME/gtk/-/issues/6116
---

diff --git a/gtk/deprecated/gtkdialog.c b/gtk/deprecated/gtkdialog.c
index c046c61df5..8dd104db02 100644
--- a/gtk/deprecated/gtkdialog.c
+++ b/gtk/deprecated/gtkdialog.c
@@ -454,7 +454,8 @@ gtk_dialog_constructed (GObject *object)
         }
       g_list_free (children);
 
-      _gtk_header_bar_track_default_decoration (GTK_HEADER_BAR (priv->headerbar));
+      if (GTK_IS_HEADER_BAR (priv->headerbar))
+        _gtk_header_bar_track_default_decoration (GTK_HEADER_BAR (priv->headerbar));
     }
   else
     {
@@ -1397,7 +1398,8 @@ gtk_dialog_buildable_add_child (GtkBuildable  *buildable,
   else if (g_str_equal (type, "titlebar"))
     {
       priv->headerbar = GTK_WIDGET (child);
-      _gtk_header_bar_track_default_decoration (GTK_HEADER_BAR (priv->headerbar));
+      if (GTK_IS_HEADER_BAR (priv->headerbar))
+        _gtk_header_bar_track_default_decoration (GTK_HEADER_BAR (priv->headerbar));
       gtk_window_set_titlebar (GTK_WINDOW (buildable), priv->headerbar);
     }
   else if (g_str_equal (type, "action"))