From 25096117e77b6a6682e49ada886ce1114c6a2fe9 Mon Sep 17 00:00:00 2001
From: Levi McCallum <levi@pinterest.com>
Date: Wed, 6 Apr 2016 16:55:12 -0700
Subject: [PATCH] Prevent ASInsetLayoutSpec from creating a computed layout
 when child is nil

Reviewers: scottg, schneider, ricky, garrett

Reviewed By: garrett

Subscribers: garrett, jenkins

Differential Revision: https://phabricator.pinadmin.com/D83683

JIRA Issue(s): BRIO-4729
---
 AsyncDisplayKit/Layout/ASInsetLayoutSpec.mm | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/AsyncDisplayKit/Layout/ASInsetLayoutSpec.mm b/AsyncDisplayKit/Layout/ASInsetLayoutSpec.mm
index 960360f8c4..ce7e6b4ea9 100644
--- a/AsyncDisplayKit/Layout/ASInsetLayoutSpec.mm
+++ b/AsyncDisplayKit/Layout/ASInsetLayoutSpec.mm
@@ -88,6 +88,12 @@ static CGFloat centerInset(CGFloat outer, CGFloat inner)
       MAX(0, constrainedSize.max.height - insetsY),
     }
   };
+  
+  if (self.child == nil) {
+    ASDisplayNodeAssert(NO, @"Inset spec measured without a child. The spec will do nothing.");
+    return [ASLayout layoutWithLayoutableObject:self size:CGSizeZero];
+  }
+  
   ASLayout *sublayout = [self.child measureWithSizeRange:insetConstrainedSize];
 
   const CGSize computedSize = ASSizeRangeClamp(constrainedSize, {