From ae5ee2926d8d413f489b32dd6c68451fce698bdd Mon Sep 17 00:00:00 2001
From: Li Tan <lit@fb.com>
Date: Thu, 12 Feb 2015 13:56:28 -0800
Subject: [PATCH] Add assertion to avoid inserting elements that is out of
 range

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

diff --git a/AsyncDisplayKit/Details/ASMultidimensionalArrayUtils.mm b/AsyncDisplayKit/Details/ASMultidimensionalArrayUtils.mm
index aeca317dbe..deb3a411dc 100644
--- a/AsyncDisplayKit/Details/ASMultidimensionalArrayUtils.mm
+++ b/AsyncDisplayKit/Details/ASMultidimensionalArrayUtils.mm
@@ -71,6 +71,8 @@ void ASInsertElementsIntoMultidimensionalArrayAtIndexPaths(NSMutableArray *mutab
     [arr insertObjects:[elements subarrayWithRange:NSMakeRange(idx - indexSet.count, indexSet.count)]
              atIndexes:indexSet];
   });
+
+  ASDisplayNodeCAssert(curIdx == indexPaths.count, @"Indexpth is out of range");
 }
 
 void ASDeleteElementsInMultidimensionalArrayAtIndexPaths(NSMutableArray *mutableArray, NSArray *indexPaths) {
@@ -84,6 +86,8 @@ void ASDeleteElementsInMultidimensionalArrayAtIndexPaths(NSMutableArray *mutable
   ASRecursivelyUpdateMultidimensionalArrayAtIndexPaths(mutableArray, indexPaths, curIdx, indexPath, [indexPaths[0] length], ^(NSMutableArray *arr, NSIndexSet *indexSet, NSUInteger idx) {
     [arr removeObjectsAtIndexes:indexSet];
   });
+
+  ASDisplayNodeCAssert(curIdx == indexPaths.count, @"Indexpth is out of range");
 }
 
 NSArray *ASFindElementsInMultidimensionalArrayAtIndexPaths(NSMutableArray *mutableArray, NSArray *indexPaths) {
@@ -99,6 +103,8 @@ NSArray *ASFindElementsInMultidimensionalArrayAtIndexPaths(NSMutableArray *mutab
     [deletedElements addObjectsFromArray:[arr objectsAtIndexes:indexSet]];
   });
 
+  ASDisplayNodeCAssert(curIdx == indexPaths.count, @"Indexpth is out of range");
+
   return deletedElements;
 }