From 3e2414da6fbfd972f7ea9d911720f0c2bf1ab13f Mon Sep 17 00:00:00 2001
From: Scott Goodson <scottgoodson@gmail.com>
Date: Sun, 27 Mar 2016 18:15:40 -0700
Subject: [PATCH] [ASInterfaceState] Fix for an edge case of exiting Visible
 state before node deallocation.

---
 AsyncDisplayKit/Details/_ASDisplayView.mm | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/AsyncDisplayKit/Details/_ASDisplayView.mm b/AsyncDisplayKit/Details/_ASDisplayView.mm
index 22477a0490..f4d95b99b8 100644
--- a/AsyncDisplayKit/Details/_ASDisplayView.mm
+++ b/AsyncDisplayKit/Details/_ASDisplayView.mm
@@ -90,6 +90,11 @@
     self.keepalive_node = _node;
   }
   else if (currentSuperview && !newSuperview) {
+    // Clearing keepalive_node may cause deallocation of the node.  In this case, __exitHierarchy may not have an opportunity (e.g. _node will be cleared
+    // by the time -didMoveToWindow occurs after this) to clear the Visible interfaceState, which we need to do before deallocation to meet an API guarantee.
+    if (_node.inHierarchy) {
+      [_node __exitHierarchy];
+    }
     self.keepalive_node = nil;
   }