From 5229069101a48aba7ee9c1fd8dbcadf4da917f70 Mon Sep 17 00:00:00 2001
From: Matthias Clasen <mclasen@redhat.com>
Date: Sun, 28 Jun 2020 11:24:09 -0400
Subject: [PATCH] widget: Avoid uninitialized access

Initialize all field in the GtkCrossingData struct
when synthesizing crossing events.

Fixes: #2743
---
 gtk/gtkwidget.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 857aa9ac62..1134e4a979 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -7539,9 +7539,11 @@ _gtk_widget_synthesize_crossing (GtkWidget       *from,
   g_return_if_fail (from != NULL || to != NULL);
 
   crossing.type = GTK_CROSSING_POINTER;
-  crossing.old_target = from;
-  crossing.new_target = to;
   crossing.mode = mode;
+  crossing.old_target = from;
+  crossing.old_descendent = NULL;
+  crossing.new_target = to;
+  crossing.new_descendent = NULL;
 
   if (from)
     {