From f77dbd234236322d99ae4df6bf07d06db7709d3a Mon Sep 17 00:00:00 2001
From: rcaridade145 <rcaridade145@gmail.com>
Date: Sat, 22 Feb 2020 11:59:45 +0000
Subject: [PATCH 8/9] Introduce nullpointer checks and return null if
 validation fails

---
 src/core/frame.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/core/frame.c b/src/core/frame.c
index f6e884a5..7ad74e5e 100644
--- a/src/core/frame.c
+++ b/src/core/frame.c
@@ -408,10 +408,13 @@ meta_frame_sync_to_window (MetaFrame *frame,
 cairo_region_t *
 meta_frame_get_frame_bounds (MetaFrame *frame)
 {
-  return meta_ui_get_frame_bounds (frame->window->screen->ui,
-                                   frame->xwindow,
-                                   frame->rect.width,
-                                   frame->rect.height);
+  if(frame->xwindow && frame->window !=NULL && frame->window->screen  !=NULL && frame->window->screen->ui !=NULL)  {
+	return meta_ui_get_frame_bounds (frame->window->screen->ui,
+                                     frame->xwindow,
+                                     frame->rect.width,
+                                     frame->rect.height);
+  }
+  return NULL;
 }
 
 void
-- 
2.21.1