From da91a9de4b6b3d4501a053e1528abe4e44b3a726 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Tue, 3 Mar 2020 18:24:31 +0100
Subject: [PATCH] render: csd: assert surfaces exist before trying to use them

---
 render.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/render.c b/render.c
index dc884d17..919cf8bd 100644
--- a/render.c
+++ b/render.c
@@ -942,6 +942,9 @@ render_csd(struct terminal *term)
         struct wl_surface *surf = term->window->csd.surface[i];
         struct wl_subsurface *sub = term->window->csd.sub_surface[i];
 
+        assert(surf != NULL);
+        assert(sub != NULL);
+
         if (width == 0 || height == 0) {
             /* CSD borders aren't rendered in maximized mode */
             assert(term->window->is_maximized || term->window->is_fullscreen);