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-rw-r--r--libdbusmenu-gtk/parser.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/libdbusmenu-gtk/parser.c b/libdbusmenu-gtk/parser.c
index 3243c81..e988c62 100644
--- a/libdbusmenu-gtk/parser.c
+++ b/libdbusmenu-gtk/parser.c
@@ -283,6 +283,9 @@ toggle_widget_visibility (GtkWidget * widget)
static void
watch_submenu(DbusmenuMenuitem * mi, GtkWidget * menu)
{
+ g_return_if_fail(DBUSMENU_IS_MENUITEM(mi));
+ g_return_if_fail(GTK_IS_MENU_SHELL(menu));
+
ParserData *pdata = (ParserData *)g_object_get_data(G_OBJECT(mi), PARSER_DATA);
pdata->shell = menu;