From f0613184cfa410215724966a9a476dc0eeebdbbe Mon Sep 17 00:00:00 2001
From: Keegan McAllister <kmcallister@mozilla.com>
Date: Wed, 11 Dec 2013 15:26:05 -0800
Subject: [PATCH] Don't clear buffers if we have no native graphics context

Fixes ./servo -z for content that calls window.close(), such as content tests.
---
 src/components/gfx/render_task.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/components/gfx/render_task.rs b/src/components/gfx/render_task.rs
index e25c1354bba..00c30a51958 100644
--- a/src/components/gfx/render_task.rs
+++ b/src/components/gfx/render_task.rs
@@ -174,7 +174,9 @@ impl<C: RenderListener + Send,T:Send+Freeze> RenderTask<C,T> {
             render_task.start();
 
             // Destroy all the buffers.
-            render_task.buffer_map.clear(native_graphics_context!(render_task));
+            render_task.native_graphics_context.as_ref().map(|ctx|
+                render_task.buffer_map.clear(ctx)
+            );
         }
     }