From d178eafa74873182883b1c724f2e82c4332eafbb Mon Sep 17 00:00:00 2001
From: Adam Barth <github@adambarth.com>
Date: Wed, 18 May 2016 09:55:11 -0700
Subject: [PATCH] Don't call Dart_TimelineGetMicros during startup on Mac
 (#2696)

It crashes. We either need to make it safe to call before
Dart_Initialize on Mac or we need to use some other way of measuring
startup time.

Fixes #4006
---
 sky/shell/platform/mac/platform_mac.mm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sky/shell/platform/mac/platform_mac.mm b/sky/shell/platform/mac/platform_mac.mm
index 5fa9be6aff..6aef28eada 100644
--- a/sky/shell/platform/mac/platform_mac.mm
+++ b/sky/shell/platform/mac/platform_mac.mm
@@ -56,7 +56,11 @@ static void RedirectIOConnectionsToSyslog() {
 class EmbedderState {
  public:
   EmbedderState(int argc, const char* argv[], std::string icu_data_path) {
+#if TARGET_OS_IPHONE
+    // This calls crashes on MacOS because we haven't run Dart_Initialize yet.
+    // See https://github.com/flutter/flutter/issues/4006
     blink::engine_main_enter_ts = Dart_TimelineGetMicros();
+#endif
     CHECK([NSThread isMainThread])
         << "Embedder initialization must occur on the main platform thread";
 
-- 
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