From d0ebd42e3ee2a716b9b76db3d96a786e9ba54e45 Mon Sep 17 00:00:00 2001
From: Daniel Boles <dboles.src@gmail.com>
Date: Sun, 11 Jun 2023 11:46:36 +0100
Subject: [PATCH] Popover: If can't get widget rect, zero output ptr

cherry-pick of commit a6d40b610be6acb635d8732c11bb6d866bf2e95d

Fixes https://gitlab.gnome.org/GNOME/gtk/-/issues/893#note_1766079
---
 gtk/gtkpopover.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gtk/gtkpopover.c b/gtk/gtkpopover.c
index 5093962aa1..2532472877 100644
--- a/gtk/gtkpopover.c
+++ b/gtk/gtkpopover.c
@@ -133,6 +133,8 @@
 
 #include "gdk/gdksurfaceprivate.h"
 
+#include <string.h> /* memset */
+
 #define MNEMONICS_DELAY 300 /* ms */
 
 #define TAIL_GAP_WIDTH  24
@@ -2192,7 +2194,10 @@ gtk_popover_get_pointing_to (GtkPopover   *popover,
       GtkWidget *parent = gtk_widget_get_parent (GTK_WIDGET (popover));
 
       if (!gtk_widget_compute_bounds (parent, parent, &r))
-        return FALSE;
+        {
+          memset (rect, 0, sizeof (GdkRectangle));
+          return FALSE;
+        }
 
       rect->x = floorf (r.origin.x);
       rect->y = floorf (r.origin.y);