From ea8c509275089bd181df5a1a1ff6483cbadb5c00 Mon Sep 17 00:00:00 2001
From: Kaushik Iska <kaushikiska@google.com>
Date: Thu, 11 Jun 2020 15:28:39 -0700
Subject: [PATCH] Exit before pushing a trace event when layer tree holder is
 empty

---
 shell/common/rasterizer.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/shell/common/rasterizer.cc b/shell/common/rasterizer.cc
index e09a29df7f9f0..75327b3548374 100644
--- a/shell/common/rasterizer.cc
+++ b/shell/common/rasterizer.cc
@@ -120,6 +120,11 @@ void Rasterizer::DrawLastLayerTree() {
 }
 
 void Rasterizer::Draw(std::shared_ptr<LayerTreeHolder> layer_tree_holder) {
+  if (layer_tree_holder->IsEmpty()) {
+    // We do not have any frame to raster.
+    FML_LOG(ERROR) << "empty frame!!!!!";
+    return;
+  }
   TRACE_EVENT0("flutter", "GPURasterizer::Draw");
   if (raster_thread_merger_ &&
       !raster_thread_merger_->IsOnRasterizingThread()) {