From d89504e345f29d0ef9b30f063b990f1e99c76a19 Mon Sep 17 00:00:00 2001
From: Eric Horacek <horacek.eric@gmail.com>
Date: Thu, 5 May 2016 23:47:50 -0700
Subject: [PATCH] Fix index path arithmetic error

---
 AsyncDisplayKit/Private/ASMultidimensionalArrayUtils.mm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/AsyncDisplayKit/Private/ASMultidimensionalArrayUtils.mm b/AsyncDisplayKit/Private/ASMultidimensionalArrayUtils.mm
index 722414047f..5c0ca004bf 100644
--- a/AsyncDisplayKit/Private/ASMultidimensionalArrayUtils.mm
+++ b/AsyncDisplayKit/Private/ASMultidimensionalArrayUtils.mm
@@ -67,7 +67,12 @@ static BOOL ASElementExistsAtIndexPathForMultidimensionalArray(NSArray *array, N
     return NO;
   }
 
-  return ASElementExistsAtIndexPathForMultidimensionalArray(array[firstIndex], [indexPath indexPathByRemovingLastIndex]);
+  NSUInteger indexesLength = indexLength - 1;
+  NSUInteger indexes[indexesLength];
+  [indexPath getIndexes:indexes range:NSMakeRange(1, indexesLength)];
+  NSIndexPath *indexPathByRemovingFirstIndex = [NSIndexPath indexPathWithIndexes:indexes length:indexesLength];
+
+  return ASElementExistsAtIndexPathForMultidimensionalArray(array[firstIndex], indexPathByRemovingFirstIndex);
 }
 
 #pragma mark - Public Methods