From: Lukáš Tyrychtr <ltyrycht@redhat.com>
Date: Mon, 29 May 2023 13:14:51 +0000 (+0200)
Subject: GtkStack: Fix a potential crash in gtk_stack_get_first_accessible_child
X-Git-Tag: archive/raspbian/4.12.3+ds-1+rpi1~1^2^2^2~22^2~1^2~203^2
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=ab7a4f64cb0b3a974f83e2c2b5fba554cbac743a;p=gtk4.git

GtkStack: Fix a potential crash in gtk_stack_get_first_accessible_child

This one can occur when the stack has no pages.
---

diff --git a/gtk/gtkstack.c b/gtk/gtkstack.c
index 59a3a0357b..dad2036250 100644
--- a/gtk/gtkstack.c
+++ b/gtk/gtkstack.c
@@ -809,9 +809,12 @@ gtk_stack_accessible_get_first_accessible_child (GtkAccessible *accessible)
 {
   GtkStack *stack = GTK_STACK (accessible);
   GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
-  GtkStackPage *page = g_ptr_array_index (priv->children, 0);
+  GtkAccessible *page_accessible = NULL;
 
-  return GTK_ACCESSIBLE (g_object_ref (page));
+  if (priv->children->len > 0)
+    page_accessible = GTK_ACCESSIBLE (g_object_ref (g_ptr_array_index (priv->children, 0)));
+  
+  return page_accessible;
 }
 
 static void