From 5a677915baf77239636526712ce0005f80ea09e1 Mon Sep 17 00:00:00 2001
From: Huy Nguyen <allforone1511@gmail.com>
Date: Fri, 15 Apr 2016 22:08:48 +0300
Subject: [PATCH] ASDisplayNode should bail early if a scheduled transition was
 invalidated before its block executes

- Idea borrowed from _enqueueAsyncSizingWithSentinel
---
 AsyncDisplayKit/ASDisplayNode.mm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/AsyncDisplayKit/ASDisplayNode.mm b/AsyncDisplayKit/ASDisplayNode.mm
index d5f37c5e..0c8b189a 100644
--- a/AsyncDisplayKit/ASDisplayNode.mm
+++ b/AsyncDisplayKit/ASDisplayNode.mm
@@ -681,6 +681,10 @@ static ASDisplayNodeMethodOverrides GetASDisplayNodeMethodOverrides(Class c)
   });
   
   void (^transitionBlock)() = ^{
+    if ([self _shouldAbortTransitionWithID:transitionID]) {
+      return;
+    }
+    
     ASLayout *newLayout;
     {
       ASLayoutableSetCurrentContext(ASLayoutableContextMake(transitionID, NO));