From e75d563da7ee9bffe672cecce50798ace9552be3 Mon Sep 17 00:00:00 2001
From: Milan Sreckovic <milan@mozilla.com>
Date: Wed, 17 Jun 2015 10:33:00 -0400
Subject: [PATCH] Bug 1175521 - Posting to a dead loop. r=nical

---
 gfx/layers/ipc/CompositorParent.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gfx/layers/ipc/CompositorParent.cpp b/gfx/layers/ipc/CompositorParent.cpp
index 7c1ef323ed5..c1141d77e17 100644
--- a/gfx/layers/ipc/CompositorParent.cpp
+++ b/gfx/layers/ipc/CompositorParent.cpp
@@ -1550,7 +1550,10 @@ CompositorParent::DeallocateLayerTreeId(uint64_t aId)
   // Here main thread notifies compositor to remove an element from
   // sIndirectLayerTrees. This removed element might be queried soon.
   // Checking the elements of sIndirectLayerTrees exist or not before using.
-  MOZ_ASSERT(CompositorLoop());
+  if (!CompositorLoop()) {
+    gfxCriticalError() << "Attempting to post to a invalid Compositor Loop";
+    return;
+  }
   CompositorLoop()->PostTask(FROM_HERE,
                              NewRunnableFunction(&EraseLayerState, aId));
 }