From 970ebd987e65be3ffa34c424da35886aadb4e99a Mon Sep 17 00:00:00 2001
From: Huy Nguyen <allforone1511@gmail.com>
Date: Fri, 11 May 2018 17:26:00 +0100
Subject: [PATCH] Improve thread-safety of ASDisplayNode's didExitHierarchy
 #trivial (#916)

Since `didExitHierarchy` is called without the node's instance lock being held, the lock must be acquired before accessing `pendingInterfaceState`.
---
 Source/ASDisplayNode.mm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Source/ASDisplayNode.mm b/Source/ASDisplayNode.mm
index aa1497ac1..ed8f4a421 100644
--- a/Source/ASDisplayNode.mm
+++ b/Source/ASDisplayNode.mm
@@ -3016,7 +3016,7 @@ - (void)didExitHierarchy
     return;
   }
 #endif
-  if (ASInterfaceStateIncludesVisible(_pendingInterfaceState)) {
+  if (ASInterfaceStateIncludesVisible(self.pendingInterfaceState)) {
     void(^exitVisibleInterfaceState)(void) = ^{
       // This block intentionally retains self.
       __instanceLock__.lock();