Check array size before accessing section - rare crash for improper d…

…ata source use, de-escalated to messaging nil.
facebookarchive · Jan 14, 2016 · df10f8f · df10f8f
1 parent 9afb77f
commit df10f8f
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/AsyncDisplayKit/Details/ASDataController.mm b/AsyncDisplayKit/Details/ASDataController.mm
@@ -900,7 +900,8 @@ - (NSUInteger)numberOfSections
 - (NSUInteger)numberOfRowsInSection:(NSUInteger)section
 {
   ASDisplayNodeAssertMainThread();
-  return [[self completedNodes][section] count];
+  NSArray *completedNodes = [self completedNodes];
+  return (section < completedNodes.count) ? [completedNodes[section] count] : 0;
 }
 
 - (ASCellNode *)nodeAtIndexPath:(NSIndexPath *)indexPath