From 59ff876b677f4bea606a7e42d0f7cda6ad16703e Mon Sep 17 00:00:00 2001
From: Levi McCallum <levi@levimccallum.com>
Date: Sun, 29 Nov 2015 13:51:15 -0800
Subject: [PATCH] Ensure that nil message doesn't cause invalid scalar value

---
 AsyncDisplayKit/ASCollectionView.mm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/AsyncDisplayKit/ASCollectionView.mm b/AsyncDisplayKit/ASCollectionView.mm
index 985a8f0271..2bf3ecdb8b 100644
--- a/AsyncDisplayKit/ASCollectionView.mm
+++ b/AsyncDisplayKit/ASCollectionView.mm
@@ -664,7 +664,10 @@ static BOOL _isInterceptedSelector(SEL sel)
 
 - (ASSizeRange)dataController:(ASDataController *)dataController constrainedSizeForNodeAtIndexPath:(NSIndexPath *)indexPath
 {
-  ASSizeRange constrainedSize = [_layoutInspector collectionView:self constrainedSizeForNodeAtIndexPath:indexPath];
+  ASSizeRange constrainedSize;
+  if (_layoutInspector) {
+    constrainedSize = [_layoutInspector collectionView:self constrainedSizeForNodeAtIndexPath:indexPath];
+  }
   
   if (!ASSizeRangeEqualToSizeRange(constrainedSize, kInvalidSizeRange)) {
     return constrainedSize;