From 8fbfa955de38d2c59a460d5b9e1c62b622f6b50d Mon Sep 17 00:00:00 2001
From: Benjamin Otte <otte@redhat.com>
Date: Wed, 20 Feb 2019 04:05:37 +0100
Subject: [PATCH] widget: Fail if matrix not invertible

---
 gtk/gtkwidget.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index d4a8284ae4..c3395494ad 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -11292,7 +11292,8 @@ gtk_widget_compute_transform (GtkWidget         *widget,
 
       graphene_matrix_multiply (&inverse, &priv->transform, &inverse);
     }
-  graphene_matrix_inverse (&inverse, &inverse);
+  if (!graphene_matrix_inverse (&inverse, &inverse))
+    return FALSE;
 
   graphene_matrix_multiply (&transform, &inverse, out_transform);
 
-- 
2.30.2