From c15b64b7206e6c6d129b5d732878bc61221390d5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>
Date: Wed, 18 Apr 2018 20:58:57 -0500
Subject: [PATCH] stack: protect set_visible_child_name from NULL stack

Return with error if gtk_stack_set_visible_child_name is called
with NULL parameter


(cherry picked from commit 2ee5aee4a9f01cce3dda7dff877070b62c3e2880)
---
 gtk/gtkstack.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gtk/gtkstack.c b/gtk/gtkstack.c
index b508aee659..34f5491c48 100644
--- a/gtk/gtkstack.c
+++ b/gtk/gtkstack.c
@@ -1670,6 +1670,8 @@ gtk_stack_set_visible_child_name (GtkStack   *stack,
 {
   GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
 
+  g_return_if_fail (GTK_IS_STACK (stack));
+
   gtk_stack_set_visible_child_full (stack, name, priv->transition_type);
 }